Let Us Count the Ways We Love Induction
CategoriesSustainable News Zero Energy Homes

Let Us Count the Ways We Love Induction

How we cook our food plays a key role in our ability to decarbonize our lives and keep our families healthy. Compared to activities like transportation and space heating, cooking can be modest in its emissions. It’s also one of the last holdouts in the transition to an all-electric, zero carbon home. Fortunately, there are lots of reasons why induction cooking is better than gas: control, speed, safety, health, and the environment. Let’s also look at some things to consider when buying an induction range for your home.

Induction ranges can eliminate the need for gas piped to your home, which is a game changer. Gas stoves have long been the gateway drug that fossil fuel companies use to get inside homes in the first place. Few people care about what fuel heats their water or air, but many home chefs have an emotional attachment to cooking with gas: its ability to adjust temperature quickly and the cozy blue flames that hearken back to humans’ prehistoric love of fire.

Old-school electric-resistance coils take forever to heat up and cool down, making temperature control difficult. Induction technology, however, creates an electromagnetic field that generates heat via the iron in pans. Rather than heating the space under a pan, like a traditional range, the heat emanates from the pan itself. (Here’s more info about the science for those who want to geek out.)

Like many efficient, clean energy technologies, the history of induction cooking goes back 100 years. But induction cooking’s moment has arrived. Currently, only 3% of homes in the US have induction (but the market has grown more than 40% in the past two years), and 70% of homeowners say they would consider induction for their next stove.

Image of three types of induction ranges (includes electric oven) - photo

Different types of induction ranges. Image courtesy of Yale Appliances.

Types of Induction Cooktops

The easiest way to try out induction is with a portable cooktop, also known as a hob. This countertop appliance has one or two burners and plugs into a standard outlet. These are great because they 1. let you try induction for only $60 to $200; 2. are small and portable, allowing anyone (including renters) to use them; 3. serve as a supplemental cooktop when your main range is full; and 4. support resilience. (Our friend, Brian Stewart from Electrify Now, uses his with a portable battery when camping or when the power goes out.) Check out these Epicurious reviews for the best models.

An installed induction cooktop has four or five hobs and sits in a countertop without an oven beneath. If your kitchen design currently has a gas or electric-resistance cooktop, then this will be the easiest swap-out. There are many cooktop options at multiple price points. The Yale Appliances Buying Guide gives a comprehensive list of current models.

An induction range is the full package, with a cooktop and electric-resistance oven, usually convection. It comes in three varieties: 1. freestanding, with knobs and controls at the back; 2. front control, with finished sides and controls on the front; and 3. slide-in, with front controls and unfinished sides, so they work best between cabinets.

Seven Reasons to Love Induction

Our family has been cooking with induction for the past five years. We see many pros, and only one con, when it comes to this technology that is undoubtedly the future of cooking.

Environmental

For us, transitioning to induction means that our cooking fuel comes from clean, renewable sources. Induction is slightly (5–10%) more efficient than electric coils and much more efficient (300%) than gas, according to ENERGY STAR. Because cooking accounts for only 4–5% of energy use in the home, you’ll see only modest carbon reductions by switching to induction.

Burning “natural” gas emits multiple greenhouse gases, including methane, an even more powerful greenhouse gas than carbon. A recent study found that 75% of unburned gas leakage occurs when the stove is off. Induction allows you to remove gas from your home, decarbonizing without sacrifice.

Health

We’ve likely  all heard the accumulating body of research showing that gas is a a major source of indoor air pollution posing a health hazard. Cooking with gas releases toxins like nitrogen oxides, particulate matter, and carbon monoxide—all of which can exacerbate asthma and cardiovascular disease. One Rocky Mountain Institute (RMI) researcher commented that, “For children who live in a home with a gas stove, the increased risk of asthma is on par with living in a home with a smoker.” While there are no regulations for a home’s indoor air quality, the RMI study found that some gas stoves emit indoor NO2 at levels above the outdoor standards.

Safety

In a related home-safety benefit, induction only heats the pans and pots and not the space around them, reducing cooktop temperatures and almost eliminating the possibility that anyone will get burned. Induction “burners” also turn off automatically after 10 seconds when they don’t detect a pan, and they cool down much faster after use. Our three-year-old can help stir hot pots and pans on our induction stove (as long as the contents aren’t boiling), and there is no risk of her burning herself on live flames. If she drops a towel on the stove while cooking, or even touches a burner, it’s no big deal.

Control

Induction stovetops exceed gas ranges’ performance in their ability to quickly change and control heat. There is no lag time with induction cooking like there is with electric resistance. Lowering your heat setting will almost instantly reduce your sauce from a rapid boil to a slow simmer. Induction also offers excellent low heat settings that gas burners typically struggle with.

Speed

You can boil six cups of water in two minutes. (Mic drop.) Because induction stoves are twice as fast as gas or old electric coils, boiling a large pot of water for a quick pasta dinner is actually quick. When first switching to induction, you might be surprised by how much more quickly your food cooks. Watch out!

Cleaning

The solid surface of an induction range means you can clean it with the swipe of a sponge. This is vastly superior to the time and effort it takes to remove and clean the parts of a gas or electric coil range. Plus, the smooth surface serves as an additional kitchen prep surface when it’s not cooking.

Future Proofing

As of this writing, more than 100 cities around the country (including New York City) have banned gas in new buildings, with some of those laws including a phaseout strategy for existing buildings. Go ahead and embrace the induction future before you have to.

Closeup of touch control panel of induction stove; index finger is adjusting timer - photo

Controls like this have a learning curve and many newer models are moving to knobs which are more intuitive. Image courtesy of Maytag.

You get really used to them

The one (and only) con for us is that our stove model has a bit of a learning curve. The button plus slider interface is not as intuitive as knobs (which is why many newer induction models are moving to knobs). While we quickly learned the technique, when we Airbnb our house, or have a new babysitter, we need to run through basic instructions. The advantages to the touch-and-slide controls are  that they rarely break and are more precise than dials, according to Yale Appliances. A stove with touch controls may beep and/or turn off when something—spilled liquid, a spoon, or potholder—touches the control panel. This protects the controls but can be annoying.

Last year at Thanksgiving, we rented an Airbnb with a gas stove and did a lot of holiday cooking. After not using gas for several years, the difference was striking! We could feel the particulate matter in the air infiltrating our eyes and lungs. The flames blew every which way, making us hot, and we had to remind the kids to stay back. One time a burner didn’t ignite, and we had to wait for the smell of gas to dissipate before lighting a match to make it catch. It felt crazy! How is this form of cooking still legal in our homes?

It’s time to add induction stoves to your list of home improvement priorities, so you can look forward to the improved cooking experience, safety, and human health benefits in your future. Here’s a few things you need to consider when buying induction for your home.

The transition to induction means that most of the 47 million homes that currently cook with gas will have to upgrade an electrical outlet. Most gas ranges (unless they are dual-fuel where the oven is electric) plug into a standard 120V outlet, while most induction cooking (except portable) requires a 240V wire with a 50A circuit. If you currently use an old-school electric cooktop, you may still want to upgrade the outlet. When we purchased our induction stove, the install was fairly easy. We already had a 220V outlet, but it was the older version, without grounding, rather than the modern four-prong one.

Some estimates for running a new wire and outlet for an induction stove can run as high as $3,000. Though, in our experience working with a trusted handyman, it was only about $300. Carbon Switch surveyed 90 people who switched to induction and found the average price for electrical work was $987.

Because induction works by magnetic force, it requires pots and pans made of magnetic stainless steel, cast iron, enameled iron, and nickel. Aluminum and some copper pans won’t work. High-end brands usually work, and there are also now many more affordable options. You can check your pots and pans for compatibility simply by grabbing a fridge magnet and seeing if it sticks.

Hoods that vent outdoors are important for all cooking. Even though induction and electric cooktops don’t produce NOx or CO pollution like gas stoves, any cooking, especially at high heat, produces particulate matter that needs to be vented. (This includes cooking on the portable induction hobs.) But ventilation is easier with induction because the stoves produce less ambient heat and far fewer emissions.

Inexpensive Induction range in white kitchen - photo

Inexpensive induction range in our Cleveland house. Image courtesy Naomi Cole and Joe Wachunas

Induction stoves put you on the path to superior, clean cooking and are a core technology in the decarbonized life. Fortunately, Consumer Reports has reported on a recent price decline in induction stoves, with many models now selling for about $1000.

 

For low- and medium-income households, the new Inflation Reduction Act offers rebates of up to $840 to purchase an induction stove. These low-income rebates are expected to roll out later this year. We couldn’t find many local utility rebates, but there are a couple, like this $750 one in the Bay Area.

Decarbonize your life logo

This article springs from two posts by Naomi Cole and Joe Wachunas, first published in CleanTechnica. Their “Decarbonize Your Life,” series shares their experience, lessons learned, and recommendations for how to reduce household emissions.

The authors:

Joe Wachunas and Naomi Cole both work professionally to address climate change—Naomi in urban sustainability and energy efficiency and Joe in the electrification of buildings and transportation. A passion for debarbonization, and their commitment to walk the walk, has led them to ductless heat pumps, heat pump water heaters, induction cooking, solar in multiple forms, hang-drying laundry (including cloth diapers), no cars to electric cars and charging without a garage or driveway, a reforestation grant from the US Department of Agriculture, and more. They live in Portland, OR, with two young children.

 

Reference

Start with SIP Panels: Cost Savings, Efficiency, Health, Resilience
CategoriesSustainable News Zero Energy Homes

Start with SIP Panels: Cost Savings, Efficiency, Health, Resilience

Healthy homes for a healthy planet

A building envelope is the armor that protects inhabitants, as well as interior finishes, furnishings and equipment. In the walls, roof, flooring, healthy materials are important to anyone suffering respiratory problems, like allergies and asthma. A well-designed home envelope is durable, healthy, insulating, and tightly sealed. Panelized construction homes are engineered to bring these qualities together.

In a well-sealed building, fresh air is provided through controlled ventilation systems, ensuring occupants breathe healthier, filtered air, and removing pollutants produced inside the home (dust, CO2, natural gas byproducts, etc.). Heating and cooling are maintained more efficiently and more comfortably, without leaking conditioned air through gaps in doors, walls, and ceilings. This means no drafts or ingress of polluted air, particularly during pollen or smoke advisories! SIPs have uniform insulation, which means there are no cavities where moisture might accumulate and promote mold, mildew, or rot.

Where you’re stopping air leaks you’re also blocking noise transmission pathways, leading to a quieter, and perhaps more private, living situation.

The components in insulated panels (including adhesives) meet some of the most stringent standards for indoor air quality, with low off-gassing. SIP panels have such low formaldehyde emission levels that they easily meet or are exempt from US Housing and Urban Development and California Air Resources Board (CARB) standards.

Reference

Realty Sage is Revolutionizing the Green Real Estate Market
CategoriesSustainable News Zero Energy Homes

Realty Sage is Revolutionizing the Green Real Estate Market

Zillow created a powerful and historical shift in real estate by opening up the traditional real estate industry to the public, offering home listing information directly to consumers. A full 99% of home buyers between the ages of 23 and 56 use the internet to find their homes. This remarkable effort has unmasked previously hidden information, so that home buyers are now more educated and confident in their home buying and selling. Consumer trust has shifted from real estate agents to publicly accessible data, helping buyers and sellers better understand market trends. Specializing in the green real estate market, Realty Sage shines that light on the features and real benefits of eco-friendly homes.

While Zillow helped bring the real estate industry into the light, sustainable homes are demanding more attention. Realtors see value in promoting green home features to the public, but most well-known national real estate websites do not offer the ability to search for sustainable homes in a comprehensive way. Even though sustainable homes are almost always a better investment compared to traditionally built and equipped homes, tracking and understanding their eco features has been difficult. The data about sustainable homes is, for the most part, unavailable, inaccurate, or difficult to trust. And realtors with real green home expertise can be difficult to find.

Some of the links in this article are affiliate links, meaning at no additional cost to you, we may earn a commission if you click through and register. Thank you for helping us continue to bring you great content.

Bringing the Sustainable Homes Market to the Fore

Realty Sage has stepped in to fill that void in the market with a green real estate website that focuses primarily on sustainable homes. Structured differently than Zillow or Trulia, Realty Sage listings deliver innovative marketing and education that specifically focus on sustainability and new building technologies. It gives homebuyers, sellers, and real estate professionals an online shopping experience that helps them better understand the hidden value of sustainable homes.

Realty Sage listings provide detailed and educational information about eco and energy-efficient homes for sale, including renewable energy, advanced building techniques, energy rating scores, and numerous third-party certifications like Energy Star, Pearl, Passive House, and the Department of Energy’s Zero Energy Ready Home. Listings feature verified information on cost savings and environmental impact, in addition to all the standard home listing information.

More Trust in Eco Claims for Home Listings

Energy Sage works to verify the eco claims about each home listed on the site, including energy efficiency scores and third-party certifications. The database’s Sage Score simplifies verified information on the sustainable qualities of listed homes. The score considers hundreds of features in a home and its community: renewable energy and energy efficiency; water efficiency; advanced smart home systems and appliances; interior finishes; quality construction; community and outdoor amenities; and utility costs. In conjunction, the Realty Sage Livability Categories evaluate the potential benefits of certain property features, including potential cost savings, comfort, environmental impact, and health benefits.

This helps green real estate agents and sellers more accurately market homes for a better return on the homeowners’ eco investments. And verification boosts buyers confidence in the seller’s claims. Meanwhile, industry professionals can track and understand the performance of real estate listings showcasing detailed eco features and certifications.

Connecting with Green Real Estate Agents

The right professionals can make it easier to evaluate your high-performance home at the time of sale, or when financing a new home or undertaking a sustainable renovation. Green-savvy real estate agents and other eco professionals serve every state. And Realty Sage Pros helps homeowners identify the ideal agent. To minimize spam, customers complete a short questionnaire of their real estate needs, and Realty Sage Pros will send inquiries to just three to local, knowledgeable professionals.

Realty Sage supports a culture where home buying is not just about price, location, and features. Selecting a home that delivers a positive homeowner experience includes ongoing cost savings, comfort, health, quiet, durability, functional design, future-proofing, and environmental impacts. Buying a home is one of the most important and most expensive purchases a person may ever make, so having access to the hidden attributes of a home is critical.

Realty Sage.com provides:

  1. A platform for home buyers to search thousands of sustainable homes for sale across the country.
  2. Searchability by type: energy and water efficiency, third-party certifications, healthy communities, smart homes, and much more
  3. Free green real estate listings for sellers and real estate agents with advanced marketing opportunities
  4. Hundreds of more-detailed property fields than many local multiple listing services (MLS)
  5. Prominent promotion of sustainable features and green certifications
  6. Information on long-term value, cost savings, and environmental impact of sustainable homes
  7. Resources for buyer’s financing
  8. In-depth information on sustainability and the benefits of eco features
  9. Easy connection to local real estate professionals who are knowledgeable and experienced with sustainable homes

The next time you venture into the housing market, visit Realty Sage and then let us know how it helped you. Or connect with a local, green real estate agent via RealtySagePros for advice and guidance. And if you’re a realtor with a sustainable, high-benefit home ready to sell, be sure to post your listing for free.

The author:

Kari Klaus is the Founder and CEO of Realty Sage, a dynamic real estate platform solving one of the largest obstacles to consumer adoption of high performance and sustainably built homes: education and return on investment. Realty Sage applies intelligence to big data, simplifying eco-home features with the Sage Score and benefits with the Realty Sage Livability Categories. An award-winning tech startup, Realty Sage has been featured in The Washington Post, Chicago Tribune, Silicon Valley Startups Radio, Elemental.green, and more.

 

Reference

Tackling Water Scarcity: RainStick Showers Changing the Game
CategoriesSustainable News Zero Energy Homes

Tackling Water Scarcity: RainStick Showers Changing the Game

In-home greywater recycling systems offer significant advantages to certain homes and businesses. However, due to the involved installation process, storage requirements, and extended payback period, distributed greywater treatment has been slow to take hold. Centralized public greywater treatment systems still involve several carbon-intensive transportation and treatment processes.

The founders of  RainStick Shower  have created  a point-of-use (POU) water treatment technology to combat water scarcity. The first-of-its-kind, recirculating shower in North America, RainStick offers a self-contained, sustainable alternative to traditional showers that waste water by constantly sending it down the drain. Employing a closed-loop system captures, treats, and recirculates shower water, minimizing waste and maximizing efficiency.

How RainStick works

The innovative POU loop features three distinct cleaning stages to ensure the water remains suitable and safe for reuse:

Rainstick water-saver shower in white-tile and glass walk-in shower - photo

  1. A micron-level screen traps debris, such as hair and dirt, preventing them from circulating in the water.
  2. Precisely controlled, fresh hot water is continuously introduced, maintaining the desired water temperature and pressure.
  3. RainStick disinfects the recirculating water, using high-intensity UV LED technology. This eliminates harmful bacteria and viruses, delivering purified water.

RainStick can reduce water consumption by up to 80% compared to conventional showers, with no compromise on the quality of the shower experience. According to a study conducted by the US EPA, the average American uses 82 gallons of water per day. By adopting water-saving technologies like RainStick on a larger scale, we can collectively minimize the strain on freshwater resources and reduce the energy footprint of water use in our homes.

Reference

Cost-Effective Retrofits: 7 Steps to Zero Energy
CategoriesSustainable News Zero Energy Homes

Cost-Effective Retrofits: 7 Steps to Zero Energy

How to use the 7 Steps

Building professionals can use the resource to inform clients and help explain sustainable design-build processes that maximize energy efficiency and cost-effectiveness. All eight pages are easily integrated into PowerPoints, and are free to share with colleagues. A builder’s or architect’s website can reference the steps as a proven methodology that is part of their corporate mission. And it’s easy to write and post case studies that show how a project successfully followed the steps.

The design and construction team work together to integrate each step’s purpose and strategies. So the 7 Steps spur discussions on where additional evaluations and expertise may be required, and how the different trades can be impacted. There are reminders that existing buildings are all different and that upgrades will interact with each other, so sequencing and phased implementation require careful consideration. Future maintenance requirements and expected lifetimes of different systems are major factors in determining the lifecycle cost and carbon accounting.

Think globally, act locally

Construction Worker Installing New Windows In apartment

The ZERO Coalition unites businesses, nonprofits, and local governments to propel our shared goal to change how we build and retrofit our homes and businesses. We seek to reduce buildings’ carbon footprint and electrify them with clean energy. As a coalition, we are accelerating the transition to a decarbonized building sector in Oregon. But builders, designers, policymakers, and other members of the sustainable building industry can use the 7 Steps to advance building decarbonization anywhere in North America, and beyond.

Buildings in Oregon account for about 30% of Oregonians’ energy use and 40% of our GHG emissions, the most significant chunk after transportation. According to Rocky Mountain Institute, buildings also account for 40% of global energy GHG emissions. Architecture 2030 found that “To accommodate the largest wave of building growth in human history, from 2020 to 2060, we expect to add about 2.6 trillion ft2 (240 billion m2) of new floor area to the global building stock, the equivalent of adding an entire New York City to the world, every month, for 40 years.” This is why building decarbonization is finally getting wider attention. The time is now.

Reference

Demand Response Technology: Key to Decarbonizing Multifamily
CategoriesSustainable News Zero Energy Homes

Demand Response Technology: Key to Decarbonizing Multifamily

As municipal and state regulations targeting carbon emissions in buildings slowly come online, multifamily building emissions are becoming most critical. These codes challenge owners, designers, facilities engineers, and even tenants to meet net zero commitments. Unfortunately, multifamily properties pose difficult obstacles to retrofitting with clean technologies and energy upgrades, given their split incentive between owners and tenants. One key is demand response technology, which lets homeowners and tenants voluntarily reduce energy use during grid emergencies.

For example, more than 30,000 New York City building owners must undertake energy transition upgrades to prepare for the city’s groundbreaking Local Law 97. The law propels New York City’s Climate Mobilization Act of 2019, which hopes to cut the city’s carbon emissions by 40% over the next 6 years. Starting in January 2024, these larger buildings must comply with mandatory greenhouse gas limits or face steep fines. Multifamily properties face the strictest rulings, as they comprise the largest energy consumption and overall contributions to carbon emissions.

Most of these buildings fail to comply with the new limits as they currently stand. Emissions reductions can only be achieved through building efficiency upgrades, like insulation; electrification of HVAC systems; and integration of smart home devices like thermostats. These properties demand research and widespread implementation initiatives as we head closer to 2024. First, owners and management companies must educate their tenants on the necessary changes and encourage them to play an active role in their building’s energy transition.

Demand response technology offers split incentives

How can multifamily properties overcome split incentives for making energy consumption changes and meeting emissions regulations? The primary answer lies with DR platforms, which provide financial incentives to both building owners and tenants. When electricity usage across a community spikes, utility companies are often forced to turn to polluting, fossil fuel–powered “peaker plants” to meet the excess demand. This leads to a mass increase in both carbon emissions and the cost of producing electricity–as well as local pollution.

image of smartphones showing energy management/demand response app - photoDemand response (DR) technology and pricing programs have proven to reduce energy consumption during peak periods, benefiting both local utility and the environment. Some DR programs allow utilities and grid operators to directly tap into participating customer assets, like energy storage systems, to use stored energy to support the grid. Other programs use customer engagement tactics, like alerts via app to encourage the resident to voluntarily reduce energy use themselves to help lower the peak.

Tenants and owners can receive direct cash payments from utility companies for participating. Most often, residents shift their energy consumption during peak demand times. This could be as simple as turning off a few lights or raising thermostats by a few degrees during warmer weather. These simple actions—multiplied across a city or region—add up! Collectively, they balance the strain on the grid and reduce the need for utilities to resort to peaker plants.

Automation makes it easy

Demand response technology can activate smart home devices deployed at scale in apartments, condos, and co-ops, to automatically adjust energy consumption during a grid event: thus creating “virtual power plants” (VPPs). Groups of residents living in the same building, or even spread across an entire utility territory, using the same DR platform represent a potentially significant amount of flexible energy use. When called upon to support the grid during times of high demand, their combined load reduction could offset several tons of CO2 emissions, or even negate the need for a utility to fire up a peaker plant. Utility companies benefit by cutting costs and emissions.

DR technologies also allow utility companies and building owners to compile data. Dashboards show how and when buildings are using energy, which can then be used to understand how energy is being used, further adjust schedules, and assess impact of reducing or shifting energy use. Access to data is instrumental for buildings and utility companies to understand existing emissions levels, manage energy usage, and maintain or achieve compliance after emission caps are instituted.

 

modern affordable housing project - exterior photo

 

How can multifamily properties participate in DR?

To help building owners get started with these DR technologies, rebates (most recently via the Inflation Reduction Act) can support investments in energy efficient capital improvements with smart load management. Tax incentives and rebates provide owners with a more accessible path to lower energy costs for themselves and residents, and reduce carbon emissions building-wide. Building owners can also take advantage of regional programs that provide financing for upgrading buildings. In New York for example, owners can participate in this local funding facility to accelerate VPP projects and overall decarbonization.

As climate laws similar to Local Law 97 pop up across the country, multifamily properties are adopting necessary DR technologies and encouraging changes among residents. The appliances and tools that multifamily buildings will need to meet emissions rulings and other climate laws are available now. Ultimately, owners must take control of their energy usage and include residents on the journey to a cleaner future, for their building and community.

The author:

Jeff Hendler serves as CEO and co-founder of Logical Buildings,

Reference

Heat Pumps Pave the Way to Zero Carbon
CategoriesSustainable News Zero Energy Homes

Heat Pumps Pave the Way to Zero Carbon

According to the The International Energy Association, “Heat pumps, powered by low-emissions electricity, are the central technology in the global transition to secure and sustainable heating.” Why? As rooftop solar panels, community solar, and utility-scale renewable energy expand, the incredible efficiency of heat pumps will free us from fossil fuels and help propel the way to zero carbon.

Heat pumps have been around for decades in the form of air conditioners and refrigerators, so the technology is mature and already cost competitive. The Inflation Reduction Act will bring tax credits, 30% off the cost of installation, bringing the technology within reach of even more families and property owners.

And best of all, heat pumps provide better comfort, using a more constant flow of heat compared to the on/off blast of a 3000° natural gas furnace. Heat pumps run smoothly, without temperature swings, and they filter and move more air through the house.

Whole house heat pumps

Similar to a furnace or central AC system, whole house heat pumps pump heat throughout your home via ductwork. For homes with existing ducts, this can be an easy change out of a fossil fuel –burning furnace for a heat pump.

The ducted, whole house heat pumps come in constant speed and variable speed. Constant speed heat pumps (also called single– or dual-stage heat pumps) run at only one or two speeds. They either run at full blast or they’re off, nothing. These often feature a lower upfront cost, but higher operational costs. And they usually require some type of backup (electric-resistance or gas) heating system, because they will struggle to work efficiently below 20° or 30°F. You’ll recognize a constant speed heat pump by the fan on the top of the outdoor unit, looking like a classic air conditioner box.

Variable speed heat pumps run at different speeds, modulating up and down to maintain the target temperature. They run a lot, but at lower energy levels and are overall more efficient. They will cost more upfront, but many work well in much colder temperatures. Thus, all cold climate heat pumps run at variable speeds.

Compared to the on/off blast of constant speed heat pumps, variable speed models run more quietly at lower speeds. You’ll see a more vertical looking outdoor unit with a fan on the side rather than the top. Variable speed units can be used with both ductless and ducted heat pump systems.

In 2021, we replaced an ancient gas furnace on one side of a Cleveland, OH, duplex. This whole-house, variable-speed heat pump provides heating and cooling under highly variable weather conditions. Because it’s used for short-term rentals, we keep it at a comfortable 72° all year. This all-electric arrangement on this side of the duplex costs far less to operate than the gas side.

Ductless heat pumps

As their name implies, ductless heat pumps don’t use ducts to distribute heat. Instead, they rely on indoor units (aka “heads”) installed in the wall, linking directly to an individual outdoor condenser; similar to a window or wall air-conditioning unit. This means that no conditioned air is escaping through leaky ducts, nor are ducts exposed to sunlight or unconditioned space. So ductless installations are most efficient.

Ductless heat pumps are logical for any space without ductwork. And they offer efficiency, economic, and environmental advantages over a central ducted heating system. All DHPs use variable speed technology. One downside is that you need to install a head on an exterior wall wherever you want heat; or provide backup electric-resistance heaters for rooms that don’t (or can’t) have a head

In our home in Portland, OR, heat pumps have kept our family warm for over a decade, since we removed our gas furnace. We also gained some square footage in our garage, which we have converted to an accessory dwelling unit.

The home came with baseboard electric heat in bedrooms and bathrooms, in addition to the central furnace. We now have two heat pump “heads” in the living room and master bedroom, and we use the backup electric-resistance heat very occasionally in the other rooms. This hybrid approach reduced our capital costs and costs us incredibly little to run. Our energy bills are only 20% of the national average!

How will they propel us to zero?

A heat pump uses refrigerant to capture heat and then moves that heat into (heating) or out of (cooling) your house. In the winter they pump heat from outside (even from cold air) to the inside, and in summer, they reverse. Here in Portland, and other places across the globe, climate change is bringing a greater need for cooling. A heat pump is, essentially, a super-efficient, reversible air-conditioner that you can use year-round.

Heating currently accounts for nearly half of all the energy used in homes. For heating, heat pumps are three to five times more efficient than fossil fuels, and save 50% on electric bills compared to electric resistance systems. They will heat everything, from air to water to laundry, and where they’re powered solely by renewable energy, they produce zero operating carbon.

Heat pumps are therefore key to decarbonization. As they are becoming more widely available, more contractors are becoming familiar with how to size, install, and maintain them. Of the 41% of US homes that use electricity for heating, only a quarter of those (13 million) use efficient heat pumps. But in 2021, heat pump sales surpassed gas furnaces, in the US, for the first time.

Whether it’s ducted or ductless, in Oregon or Ohio, modern ranches or old craftsman duplexes, our family has used the mighty heat pump to stay warm, save money, and do our part to solve the climate crisis. So while heat pumps might not get as much love, they rank up there with solar panels and electric vehicles as crucial technologies that will decarbonize our lives without sacrificing modern comforts. Let’s get heat pumped up and put one of these amazing machines in every home ASAP.Decarbonize your life logo

This article springs from an post by Naomi Cole and Joe Wachunas, first published in CleanTechnica. Their “Decarbonize Your Life,” series shares their experience, lessons learned, and recommendations for how to reduce household emissions.

The authors:

Joe Wachunas and Naomi Cole both work professionally to address climate change—Naomi in urban sustainability and energy efficiency and Joe in the electrification of buildings and transportation. A passion for debarbonization, and their commitment to walk the walk, has led them to ductless heat pumps, heat pump water heaters, induction cooking, solar in multiple forms, hang-drying laundry (including cloth diapers), no cars to electric cars and charging without a garage or driveway, a reforestation grant from the US Department of Agriculture, and more. They live in Portland, OR, with two young children.

Reference

Top Policies That Propel Passive House in North America
CategoriesSustainable News Zero Energy Homes

Top Policies That Propel Passive House in North America

To further understand the policy structures and mechanisms driving Passive House adoption across North America, the Passive House Network (PHN) studied what, where, and how Passive House policies succeed. Beginning in 2017, a research team inventoried Certified Passive House projects and professionals, and then analyzed Passive House–focused (or Passive House–related) local policies. Three frontrunner regions shone through. And the final report examines how specific policies operating in those regions harness the power of voluntary standards, like Passive House, that are already delivering high performance; and the key patterns or mechanisms they share. Scaling and replicating these patterns has proven incredibly successful both here and abroad.

Passive House Network leader Bronwyn Barry is an architect and principal of Passive House BB. Her webinar presentation with green building resource Rate it Green deep dives into the Policy That Works report. According to Barry, “Our goal is to have everybody look at how to implement these patterns and use them in their own policies.”

Watch the 2022 video presentation on the report’s implications

 

 

The Passive House framework offers tools and training that target buildings’ operational energy use, aiming to create a long-lived built environment that is regenerative and restorative. Passive House strategies are proven to produce reliable, low energy-use intensity. And after years in practice, Passive House buildings actually cost less to build than code-compliant buildings.

The report identified New York, Pennsylvania, and British Columbia as having both a critical mass of trained Passive House professionals and a significant lead in terms of Passive House project numbers and square footage. The data confirmed that Passive House adoption in North America is primarily being driven by large, multi-family buildings.

Connecting policy to projects

The PHN research discovered a layered mix of cities, states, and utilities driving high-performance energy policies in these accelerated regions, most being state-mandated, utility-funded programs. These policies and programs were competitively run; included tiered incentives and options and/or stepped implementation; and required reporting and monitoring, so data was captured to inform further policy.

The report then distills specific features that these policies have in common:

  1. They all included training subsidies to achieve a critical mass of well-trained building professionals and civil service employees.
  2. They all included carrots: project subsidies that help to remove the risk burden of the developer and owner community.
  3. They all clearly identified, up front, the end goal.

Interestingly, the researchers determined that all three of these drivers must be in place for successful implementation at scale. They also found, in all of the frontrunner regions, a local community of advocates and practitioners who supported policymakers implementing these programs: a local, grassroots community of activists.

Further accelerating Passive House adoption, policies connected one area of regulatory framework with others. In addition, most of the frontrunner regions had removed roadblocks within the baseline code, allowing Passive House pathways to compliance.

Finally, required monitoring and cost reporting circularly fed back into either reach codes or baseline code adoption, or back into the existing incentive program to reconfigure and refine the next iteration.

Exterior image Passive House Multifamily - photo by Triplecaña

Working cooperatively

Starting the energy code process with an explicitly and clearly defined end goal helps to structure the interim steps (a back-casting structure, as contrasted with an iterative code update process). A stepped energy code can also replace a multitude of reach codes in different municipalities.

In the webinar, Barry points out that at the city, state, and utility level, all of these successful policies connect. They were “quilted together” to work effectively. Each civic entity developed programs that supported programs and incentives run by fellow entities.

As an example, Barry highlighted a Vancouver program that connected zoning variances to certified passive house projects. Vancouver’s zero-emissions building plan issued in 2016 includes training of municipal staff, for an integrated approach. Bary emphasized training repeatedly as an oft-overlooked but essential component of successful programs.

British Columbia also provided up to $80,000 to incentivize manufacturers to develop Passive House Certified windows. The local building codes and incentives then created the market for them, producing a “virtuous feedback loop.”

New York City required their public works buildings to be Certified Passive House: fire stations, school retrofits, affordable housing, etc. NYC also implemented a benchmarking law (all the large buildings must measure and report energy consumption) and then set carbon caps, driving emissions gradually toward net zero carbon. This goal-oriented approach motivates owners to leap ahead when retrofitting and to plan for net zero in new buildings.

Barry then highlighted New York State’s Buildings of Excellence Program, a competitive award that funds early design explorations. The feedback that tracks modeling methodologies is encouraging innovation, because it removes some of the developers’ risk.

Pennsylvania linked their affordable housing tax credits to high-performance buildings, giving far more points for Passive House Certification. “See how policies, programs, and incentives actually can quilt together with policies similarly operating, and make each of them work better together. [The] additional points make it more likely to get financing through the state-run financing program.” explained Barry. “And lo and behold, after three years of running this program, the Passive House buildings performed reliably and ended up costing less money per square foot than the baseline code-compliant buildings. Because the professional community figured out ways to do this cost effectively.”

Reference

The Unsung Success Story of Increased Efficiency (And Why We All Need More of It)
CategoriesSustainable News Zero Energy Homes

The Unsung Success Story of Increased Efficiency (And Why We All Need More of It)

A number of organizations have charted a path to a decarbonized world by 2050 and broken down required action in four areas or “pathways.” The third pathway is often the unsung hero of our climate successes to date: efficiency.

Simply put, efficiency means using less of a resource to achieve the same result. The 1970s oil embargo and energy crisis inspired the modern energy efficiency movement in the United States, which led to a $360 billion energy efficiency industry. This industry managed to keep both energy and electricity usage flat over the past 20 years, despite the fact that the population has grown by 10% from 301 million to 331 million over the same period.

According to the American Council for an Energy Efficient Economy, over a 25 year period from 1980 to 2014, efficiency investments resulted in a 50% improvement in US energy intensity. This means that while energy use increased by 26%, overall gross domestic product (GDP) far outpaced energy use, increasing by 149%.

These decades of unsung progress have significantly reduced energy use in buildings, industry, and transportation and thus lowered demand for more fossil fueled power. Amidst the doom and gloom of the climate crisis, it’s important to remember to celebrate and amplify what we humans are doing right. Efficiency falls on the bright side of the “best of times, worst of times” dichotomy, so let’s make sure to give ourselves credit for our successes.

We might call efficiency the low hanging fruit on the pathway to decarbonization. There’s so much more to be picked.

Efficiency sometimes gets a bad rap because it so often includes messages of scarcity like “reduce” and “limit,” and can feel like doing less bad rather than more good. This narrative suggests that people have to sacrifice or change their lifestyle, which few of us want to hear. But this is largely a communication problem.

Amazing advances in technology mean that our homes and vehicles can use less energy without anyone noticing, and without sacrificing our quality of life. For example, refrigerators use 75% less energy now than they did a couple decades ago, and they perform better and cost less. Light bulbs have followed the same trend, accounting for 10% of an average home’s electricity consumption in 2015 and only 4% in 2021, thanks to LEDs. A decarbonized life has many advantages and thus offers a narrative of abundance rather than scarcity. Denmark uses about 40% of the energy that the US uses and yet it’s recognized for the second highest quality of life in the world.

Taking efficiency to the next level

While we celebrate all these society-wide gains in efficiency, in our family we find it easy to take efficiency to the next level. We believe the climate crisis asks this of us. For us, being efficient and wasting less involves both:

  1. Technologies—the products, appliances and fixtures in our home that reduce energy use through their operations. Think efficient appliances, insulation, LED lighting, etc. (shower heads are a personal favorite), along with what we call the “big moves” of heat pumps for space and water heating, which cut home energy use by a whopping 50% to 75%.
  2. Behaviors—the routines, habits, and practices we form that have a measurable impact on carbon reduction. Think hang-drying laundry and eating less meat.

Combining both strategies will supercharge energy savings and make it easier for utilities, or rooftop solar panels, to provide all the clean power our household needs.

But it’s also clear that efficiency isn’t a silver bullet, and we can’t collectively “efficiency our way out” of the climate crisis. Many of the efficiency solutions of recent decades included enhanced methane and petroleum burning technologies, but no matter how efficient your gas furnace or gas car is, it’s still burning fossil fuels that emit the greenhouse gases that are changing the climate. This is why efficiency and the electrification pathway go hand in hand. It’s much easier to electrify everything and run our lives on clean electricity if we first reduce our energy needs.

At the same time, while some proponents of electrification believe we can decarbonize without worrying much about efficiency, a commitment to efficiency is undoubtedly the best way to make electrification work. Efficiency lowers how much new renewable electricity we’ll need in the coming decades.

Household efficiency strategies

Our family’s efficiency strategies (which mostly now feel old school) include blowing in extra cellulose insulation into our attic, to increase home comfort, and air sealing all the penetrations so conditioned air doesn’t sneak out. Other strategies include installing low-flow shower heads and faucet aerators to reduce both water use and the energy needed to heat the water.

Over the past decade, we also replaced most of our old appliances with ENERGY STAR–certified, all-electric, super-efficient ones, and opted for heat pumps to heat our home and water and to dry our clothes, because heat pumps are the most efficient way to create heat. We also practice easy passive cooling techniques during our increasingly hot summers, which most of the time means we don’t need air-conditioning. Finally, we bought our home in a neighborhood with a high walk score so that we can move efficiently and walk, bike, and ride transit whenever possible. All these efficiency measures make it easier for our family’s 28 solar panels to meet most of our home and transportation energy needs.

All in all, efficiency is a crucial pathway to both personal and societal decarbonization. And whether you sing it’s praises or not, we’ve all gotten a lot more efficient in how we use energy over the past decades. It’s time to build on this success and continue to find ways to use electric, renewable energy better.

This article is part of a series by Naomi Cole and Joe Wachunas, first published in CleanTechnica. Through “Decarbonize Your Life,” they share their experience, lessons learned, and recommendations for how to reduce household emissions, building a decarbonization roadmap for individuals.

The authors:

Joe Wachunas and Naomi Cole both work professionally to address climate change—Naomi in urban sustainability and energy efficiency and Joe in the electrification of buildings and transportation. A passion for debarbonization, and their commitment to walk the walk, has led them to ductless heat pumps, heat pump water heaters, induction cooking, solar in multiple forms, hang-drying laundry (including cloth diapers), no cars to electric cars and charging without a garage or driveway, a reforestation grant from the US Department of Agriculture, and more. They live in Portland, OR, with two young children.

 

Reference

Four Heating & Cooling Myths Costing You Money
CategoriesSustainable News Zero Energy Homes

Four Heating & Cooling Myths Costing You Money

Record-high utility prices have homeowners eager for short- and long-term solutions to reduce costs and improve the efficiency and value of their home. Operating an HVAC system takes the largest toll on energy use in most homes and drives up utility bills. And it’s absolutely crucial to the occupants’ comfort. Debunking a few common heating and cooling myths reveals ways to lower energy costs and lessen the impacts of climate change.

MYTH #1
My other appliances don’t impact how well my HVAC works

Shocked sad young man surprised and stressed as read utility bill, holding eyeglassesMost appliances and tools use energy even when not in active use. Items that require a lot of energy to operate (e.g., dryer, dishwasher, EV charger) increase a home’s peak load, i.e., how much electricity it needs to pull from the local grid at a given moment. Running several energy-intensive or inefficient appliances at once, particularly at a time when energy costs are high (summer afternoons, for instance) can not only trigger higher bills and strain the grid, but also cause the appliances themselves to run less efficiently.

Look up your utility’s rate schedule to understand when costs and demand are high, and try to plan around these windows. Not every task can be completed overnight, but waiting to charge your EV or run the dishwasher will help you avoid peak pricing and keep other appliances and systems, like HVAC, more efficient and effective.

Whole home energy monitoring devices and platforms provide a deeper understanding of how energy is being used and wasted in your home. These are available at a variety of price points and identifying simple actions that could lower utility bills may make that upfront cost worth it! In the same way, upgrading to smart appliances with advanced technology and those with ENERGY STAR certifications could prove worthwhile investments in the long term.

MYTH #2
I won’t notice a difference in energy costs with a smart thermostat

Green tech- Smart thermostat can save money and energy

The US Energy Information Administration estimates that HVAC operations account for over 50% of home energy use. That’s a large portion of your utility bill and an area where even small changes to your habits can make a big difference.

Smart thermostats have grown in popularity in recent years. These devices are designed to take the guesswork out of saving energy while also keeping your home comfortable. Many come with suggested eco-friendly settings or profiles that run automatically and will raise or lower your set temperature during portions of the day to maintain efficiency and keep costs low.

Even just upgrading from a traditional thermostat to one that allows for programmable digital temperature controls can help lower costs over time. While you may not notice an immediate difference on your next bill, the consistent changes will reduce costs and preserve the health of your HVAC system. For instance, setting a thermostat back 7-10 degrees for eight hours a day can lower utility bill costs by 10% annually.

MYTH #3
Relying on space heaters in drafty parts of my home is more efficient

Halogen or infrared heater in action against wooden floor - photo

Space heaters are notoriously inefficient and expensive to run. If you’re bringing in space heaters to keep areas of your home warm while your heating is also running, you have a larger weatherization problem. Drafts come from improper or worn sealing on doors and windows, in attics and even around electrical outlets. Cranking up your heat or plugging in those space heaters is not a long-term fix and will cost you more over time as heat continues to escape in these places.

The same goes for summer. If you find yourself turning to window or wall units and additional fans because your central air conditioning isn’t up to the job, insulation issues are to blame.

Addressing these issues can be simple. Look for DIY weather-sealing solutions like adhesive barrier tape that can be applied to windows and doors. A professional home energy audit may also come in handy here if initial repairs don’t do the trick. These assessments can cost as little as $100 to $150 and identify places where larger, planned repairs can lead to terrific cost savings over time. According to the EPA, air sealing and insulation upgrades in attics, crawlspaces, and basement rim joists can save homeowners an average of 15% on heating and cooling costs.

MYTH #4
Setting my thermostat higher/lower will heat/cool my home more quickly

Young woman comfortable near air conditioner at home

Maintaining a consistent, eco-friendly temperature is always the smarter choice for energy efficiency and the health of your HVAC system. The DOE recommends a set point of 68 degrees during winter months and 78 degrees for summer. While it can be tempting to bump the temperature down several degrees on a hot day when you’re returning home from running errands and craving a blast of cool air, doing so will not cool your home faster and, in fact, a lot of energy can be wasted in the process.

Even if you want variation in your home’s climate throughout the day—keeping things cooler at night or warmer on winter days when you work from home, for instance—try to stick to a schedule and consistent set points when you do make changes. This is another instance where a smart thermostat with automated and programmable options can help you save energy and reduce bills by sticking to your plan. No matter what type of thermostat you’re using, you can also look to fans, shades, dehumidifiers, and other tools to help maintain comfortable temperatures in your home.

Easing the path to savings

To begin addressing these myths, you simply need to commit to behavioral changes that require little to no financial investment. There are also larger upgrades and projects, including installing renewable energy technologies and storage to lower a home’s carbon footprint and decrease utility costs over time. But that undertaking will always be preceded by an energy and weatherization audit and any needed improvements.

While many homeowners still may be unsure where to start, the Inflation Reduction Act (IRA) introduced last year extended a 30% tax credit for rooftop solar and energy storage, and expanded rebates and tax credits for a range of home improvements and technologies. By easing the point of entry for millions of homeowners, the IRA offers attractive options for bolstering home efficiency and value through clean energy.

The author:

Smiling clean-cut man in white collared shirt; Greg Fasullo headshot - photoGreg Fasullo is CEO of Elevation, a whole-home energy solutions company that provides energy efficiency repairs, solar panels, and energy consumption education across the country. 

 

Reference