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For every level of laundry needs.

Americans love laundry. Of the common household chores, it is
by far the most popular — and the most energy-intensive. Washing and drying a load of laundry every two days for a year generates roughly the same emissions as driving from Chicago to New York and back again in a gasoline-powered passenger vehicle. Nearly three-quarters of those emissions come from drying alone; meanwhile, according to the Environmental Protection Agency, the average washing machine generates up to 8% of a home’s total energy use. The whole process can cost up to $150 per year in electricity alone, depending on where you live and the frequency of your washes.
With some regulatory prodding, manufacturers have tried to improve water and energy efficiency in new appliances and have rolled out fancy new features like “smart” water-level sensors, vibration reduction technologies, and microfiber-catching filters. But not every house — or budget — has room for the latest and greatest technologies, and systems that would work well in an airy Los Angeles laundry room might make less sense in a drafty apartment in Minnesota.
Heatmap is here to remove some of the guesswork from upgrading one of your home’s most-used appliances. Here is our expert panel’s insight into when and how to purchase a new washer and dryer for your home.
Joanna Mauer is the deputy director of the Appliance Standards Awareness Project, a non-profit advocacy group pushing for stricter energy efficiency legislation. In her role at ASAP, Mauer works with the Department of Energy on its efficiency rules for residential appliances. She has previously worked for the Environmental Protection Agency and the Center for Integrative Environmental Research.
Amber McDaniel is the head of content at Sustainable Jungle, a website and podcast that publishes tips, tricks, and product reviews, including for major household appliances, with a focus on environmentally friendly solutions.
Scott Flint is a licensed California appliance tech with 30 years of experience. He is known as the Fix-It Guy on his YouTube channel, where he promotes the upkeep and repair of home appliances to extend their use. He has also written extensively about washers and dryers for publications such as The Family Handyman, Taste Of Home, and Earth911.
Peruse the latest washers and dryers and you’ll see features like sensors that adjust the water level to match the load of laundry, voice-activated start buttons, WiFi-enabled push notifications for when it’s time to move a load to the dryer, and more. And while there are environmentally friendly upsides to some of these features, “the more simple the machine, the less likely that things will fail,” Flint told me. In his experience repairing hundreds of washers and dryers over the years, “People save money on their initial purchase and the machine is going to last longer if you can minimize the features.”
The Energy Star certification is a great starting point in your shopping journey. But it shouldn’t be the be-all, end-all of your research. Energy Star represents a range of efficiency standards from different brands, with only the top models earning a “ Most Efficient” distinction.
You’ll still want to read reviews to get a better understanding of the reliability of the products you’re looking at, too. Though many new features on the market promise water and energy savings, they’re harder to repair yourself, meaning any potential fixes can get expensive. They can also have shorter lifespans than simpler models.
Eco-friendly washers and dryers are great for a whole laundry list (get it?) of reasons: They lower your household energy bill, they reduce emissions, they reduce wasted water, they’re often easier to install, and they can be gentler on your clothes. But they don’t necessarily save you time. Energy-efficient electric dryers can take up to twice as long to dry your clothes than traditional gas dryers. Still, all of our expert panelists agreed the upsides outweigh the drawbacks.
Yes, this is a buying guide for purchasing a new washer and dryer. But before you spend money on new appliances, you should consider working with what you already have.
If you’re dealing with an old or sub-optimally functional machine and wondering whether now is the time to upgrade, repairing your existing washer or dryer can actually be a smarter and thriftier solution; in fact, Consumer Reports only recommends replacing a dryer if it’s over 10 years old, electric, and cost less than $700 when you initially purchased it. Often, whatever’s going on doesn’t even require a professional to fix. “I think only rarely — let’s say about 20% of the time — would most people need to call in a technician,” Flint told me. Most washer and dryer problems are something you can fix using “normal household tools.” (More on that later.)
Keep in mind, even if you have an old washer or dryer that isn’t very energy efficient, “that’s still not even going to come close to touching the amount of energy that was used to produce and ship a new machine,” McDaniel told me. When your washer or dryer “actually fully stops working and it’s not doing what you need it to do — that’s when it’s time to upgrade.”
Typically, 1.5 to 3.4 cubic feet of capacity is suitable for a one- to two-person household, 3.5 to 4.4 cubic feet will do for two to three people, and 4.5 or more cubic feet will serve a household with more than three people. But having a new baby or pets might mean you do more loads of laundry than an average household, in which case sizing up is better.
Flint told me a common mistake he sees people make is overloading their washing machines, which can destroy an appliance’s rear bearing — the part of the machine that helps the drum rotate smoothly — a repair that is often so costly, it can make more sense to junk the whole machine. On the other hand, running small loads in a large-capacity washing machine can mean wasting water cleaning not-as-many clothes. Consider what washing machine would make the most sense for your needs to maximize efficiency.
Energy and water efficiency are two of the most common considerations when buying a washer and dryer, and are the primary focus of this guide. Some consumers may have additional concerns — McDaniel, for example, recommended looking for a Restriction of Hazardous Substances certification, which signals that an appliance complies with limits on heavy metals like lead and cadmium. Ethical considerations — including a manufacturer’s contributions to armed conflicts, labor practices, and sourcing of conflict minerals — are also worth close inspection. Ethical Consumer offers an excellent guide for finding a brand that best aligns with your values.
“The first thing that we always recommend is: If you need something new, try to go refurbished,” McDaniel told me. Still, there’s a right way and a wrong way to make a major second-hand purchase. McDaniel suggested going through a reputable source that offers a warranty, such as Best Buy (when searching online, make sure to filters for “Energy Star” and “open box” and check the product’s condition).
If you prefer the security of a new product, then it’s time to familiarize yourself with the Energy Star website. You can sort by Energy Star Most Efficient, which are the best of the best, as well as by price, brand, volume, front-load vs. top-load, vented, ventless, heat pump, gas, electric, and more. Energy Star also makes it easy to compare the specs of different products (just tick the “compare” box next to the machines you’re looking at, then scroll to the top to hit the orange “compare” button when you’re ready).
Dryers are the biggest energy suck in most homes, using two to four times as much energy as new washers and nearly twice as much as new refrigerators. McDaniel told me they are also responsible for the greatest wear and tear on clothes. Dryers are an especially American phenomenon; while more than 80% of households in the U.S. own a dryer, just 30% of European households do. That is to say, you probably don’t actually need one, and if you need to save money or space in your laundry routine, this would be the best place to look to make a cut.
“Not relying on a dryer is huge. I only use mine in the wintertime, and in the summer, I line dry my clothes — and the only reason I don’t do that in the winter is I literally don’t have the space inside,” McDaniel said.
Traditional vented dryers — the energy guzzlers of the American home — aren’t the only option anymore, though. The next best thing to a clothesline is a heat pump dryer, which Mauer told me is the “most efficient clothes dryer on the market today,” often far exceeding the Energy Star requirements. Heat pump dryers have a lower maximum temperature, though, so you don’t get that hot-out-of-the-dryer feel when the load is finished. It can also take an hour or more to dry a load of laundry fully. The bright side: Because the heat is lower, heat pump dryers are much gentler on your clothes.
“A big red flag for us is brands that don’t warranty their products in any capacity,” McDaniel told me. Buying a washer or dryer that is durable is important — Flint told me you should expect to get at least a decade of use out of a washer and dryer with proper maintenance and minor repairs — and a warranty is evidence that a company is building a product that they trust to last.
The Electrolux ELFW7637AT has one of the highest energy- and water-efficiency ratings of any washing machine on the market in 2024, with an IMEF of 3.2 and an integrated water factor of 2.6 — both of which are exceptional even by Energy Star’s standards. It also works. Reviewers have lauded its SmartBoost stain removal technology, its internal water heater, and its straightforward controls, although its 85-minute cycle time is a little longer than many other washers on the market.
Both Flint and McDaniel spoke highly of the German brand Miele, which makes this compact washing machine. Though its capacity is about half that of the Electrolux and it didn’t earn Energy Star’s highest level of certification (it has an IMEF of 2.9 and a IWF of 3.2), it is one of the more reliable and best-reviewed washers on the market.
Admittedly, you have to pay for that kind of dependability — Miele is a high-end brand with a sticker price that reflects it. The WXI860 gets high marks for its cleaning ability, including fill-and-forget auto-dispensing features, and boasts 72% lower energy consumption than conventional washers. Additionally, Miele has “a honeycomb-drum technology, so that when it puts the clothes in the spin cycle, it creates a thin film of water between the drum wall and the laundry,” McDaniel told me, which helps prevent clothing fibers from getting caught. “Little features like that that help keep our clothes in circulation for longer are also more sustainable.”
Mauer swears by heat pump dryers, and there are a number of good choices on the market right now. Beko is a favorite of the Sustainable Jungle team, in part because it has a filtration system to stop microplastics from synthetic fabrics from entering the waterways, as well as the company’s ambitious commitments to low-waste and recycled materials. This ventless Beko heat pump dryer is tiny but mighty, making it a great fit for small spaces (it can even fit under the kitchen counter), and it boasts a 2023 “Most Efficient” rating from Energy Star.
Being a heat pump dryer, though, it can take a while to dry clothes — one tester found it took 227 minutes to dry a large, bulky load to 100% — but plan ahead and Beko can give you major savings in the long run. Or, if the Beko isn’t quite what you’re looking for, check out Miele, which makes its own well-reviewed heat pump dryer (although it is small and pricy).
If a heat-pump dryer isn’t right for your lifestyle, the Electrolux ELFE7637AT is one of the more impressive electric dryers on the market right now, earning the Energy Star seal of approval. While it still isn’t super fast (fast takes a lot of heat, which takes a lot of energy, which makes a machine less efficient), reviewers say it can get a large load to 100% dry in 60 minutes if need be. It’s also the best-rated electric dryer on Consumer Reports’ list that isn’t one of the Samsung, LG, or GE models that Flint frequently gets called out to fix.
This combo washer-dryer uses heat pump technology in its dryer, making it one of the more energy-efficient single-unit models on the market. Unlike some of the other options on this list, however, its larger 4.8 cubic foot drum size is big enough for a two- or three-person household. While combo washer/dryers still have some downsides over their two-piece counterparts, including decreased efficiency in cleaning and especially drying, this is one of the better-reviewed units on the market.
Flint told me that you can often find older Kenmore Whirlpool series 80 machines on Craigslist that are “ really good, and tend to sell for about $250 when refurbished, and often come with a one-year warranty.” The only detriment, he said, is that they’re top-loaders — which waste a lot of water — but “if somebody just really needs a tough machine that is going to last, that was a really good design.”
Congratulations! You’re now the proud owner of a new washer and dryer. What happens now?
New washers and dryers are unfortunately not designed with longevity in mind — but that doesn’t mean you need to replace them if something goes wrong after four or five years.
“I can go up to a washing machine that is sitting in the dump, and I can open up the door, and I can spin the spin basket, and I can tell that it’s a perfectly good machine,” Flint told me.
Flint estimates that only about 20% of the time do people actually need to call in a technician to repair their appliances, pointing to fixes like replacing a blown fuse, unsticking a front-load washer that won’t spin, and swapping out a moldy washer door gasket as deceptively simple tasks. Get acquainted with DIY YouTube channels like Flint’s or repair blogs that explain solutions to common problems.
Still, sometimes you need to call in the big guns. In that case, Flint recommends doing your due diligence on a review service like Yelp beforehand.
Once you find someone you like, reach out with the model number of your machine and the symptom you’re experiencing and the technician “should be able to provide you a quote without coming out if they know what they’re doing,” Flint said. If someone does have to come out to figure out what’s going on, then that visit should be free. “Don’t go with someone who’s going to charge you to come out and diagnose the problem and then charge you to fix it.” Repairs to a front-loading washer will probably run around $170, according to Consumer Reports.
You can extend the life of your washer or dryer by following a few more rules of thumb.
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Plus more insights from Heatmap’s latest event Washington, D.C.
At Heatmap’s event, “Supercharging the Grid,” two members of the House of Representatives — a California Democrat and a Colorado Republican — talked about their shared political fight to loosen implementation of the National Environmental Policy Act to accelerate energy deployment.
Representatives Gabe Evans and Scott Peters spoke with Heatmap’s Robinson Meyer at the Washington, D.C., gathering about how permitting reform is faring in Congress.
“The game in the 1970s was to stop things, but if you’re a climate activist now, the game is to build things,” said Peters, who worked as an environmental lawyer for many years. “My proposal is, get out of the way of everything and we win. Renewables win. And NEPA is a big delay.”
NEPA requires that the federal government review the environmental implications of its actions before finalizing them, permitting decisions included. The 50-year-old environmental law has already undergone several rounds of reform, including efforts under both Presidents Biden and Trump to remove redundancies and reduce the size and scope of environmental analyses conducted under the law. But bottlenecks remain — completing the highest level of review under the law still takes four-and-a-half years, on average. Just before Thanksgiving, the House Committee on Natural Resources advanced the SPEED Act, which aims to ease that congestion by creating shortcuts for environmental reviews, limiting judicial review of the final assessments, and preventing current and future presidents from arbitrarily rescinding permits, subject to certain exceptions.
Evans framed the problem in terms of keeping up with countries like China on building energy infrastructure. “I’ve seen how other parts of the world produce energy, produce other things,” said Evans. “We build things cleaner and more responsibly here than really anywhere else on the planet.”
Both representatives agreed that the SPEED Act on its own wouldn’t solve all the United States’ energy issues. Peters hinted at other permitting legislation in the works.
“We want to take that SPEED Act on the NEPA reform and marry it with specific energy reforms, including transmission,” said Peters.
Next, Neil Chatterjee, a former Commissioner of the Federal Energy Regulatory Commission, explained to Rob another regulatory change that could affect the pace of energy infrastructure buildout: a directive from the Department of Energy to FERC to come up with better ways of connecting large new sources of electricity demand — i.e. data centers — to the grid.
“This issue is all about data centers and AI, but it goes beyond data centers and AI,” said Chatterjee. “It deals with all of the pressures that we are seeing in terms of demand from the grid from cloud computing and quantum computing, streaming services, crypto and Bitcoin mining, reshoring of manufacturing, vehicle electrification, building electrification, semiconductor manufacturing.”
Chatterjee argued that navigating load growth to support AI data centers should be a bipartisan issue. He expressed hope that AI could help bridge the partisan divide.
“We have become mired in this politics of, if you’re for fossil fuels, you are of the political right. If you’re for clean energy and climate solutions, you’re the political left,” he said. “I think AI is going to be the thing that busts us out of it.”
Updating and upgrading the grid to accommodate data centers has grown more urgent in the face of drastically rising electricity demand projections.
Marsden Hanna, Google’s head of energy and dust policy, told Heatmap’s Jillian Goodman that the company is eyeing transmission technology to connect its own data centers to the grid faster.
“We looked at advanced transition technologies, high performance conductors,” said Hanna. “We see that really as just an incredibly rapid, no-brainer opportunity.”
Advanced transmission technologies, otherwise known as ATTs, could help expand the existing grid’s capacity, freeing up space for some of the load growth that economy-wide electrification and data centers would require. Building new transmission lines, however, requires permits — the central issue that panelists kept returning to throughout the event.
Devin Hartman, director of energy and environmental policy at the R Street Institute, told Jillian that investors are nervous that already-approved permits could be revoked — something the solar industry has struggled with under the Trump administration.
“Half the battle now is not just getting the permits on time and getting projects to break ground,” said Hartman. “It’s also permitting permanence.”
This event was made possible by the American Council on Renewable Energy’s Macro Grid Initiative.
On gas turbine backorders, Europe’s not-so-green deal, and Iranian cloud seeding
Current conditions: Up to 10 inches of rain in the Cascades threatens mudslides, particularly in areas where wildfires denuded the landscape of the trees whose roots once held soil in place • South Africa has issued extreme fire warnings for Northern Cape, Western Cape, and Eastern Cape • Still roiling from last week’s failed attempt at a military coup, Benin’s capital of Cotonou is in the midst of a streak of days with temperatures over 90 degrees Fahrenheit and no end in sight.

Exxon Mobil Corp. plans to cut planned spending on low-carbon projects by a third, joining much of the rest of its industry in refocusing on fossil fuels. The nation’s largest oil producer said it would increase its earnings and cash flow by $5 billion by 2030. The company projected earnings to grow by 13% each year without any increase in capital spending. But the upstream division, which includes exploration and production, is expected to bring in $14 billion in earnings growth compared to 2024. The key projects The Wall Street Journal listed in the Permian Basin, Guyana and at liquified natural gas sites would total $4 billion in earnings growth alone over the next five years. The announcement came a day before the Department of the Interior auctioned off $279 million of leases across 80 million acres of federal waters in the Gulf of Mexico.
Speaking of oil and water, early Wednesday U.S. armed forces seized an oil tanker off the coast of Venezuela in what The New York Times called “a dramatic escalation in President Trump’s pressure campaign against Nicolás Maduro.” When asked what would become of the vessel's oil, Trump said at the White House, “Well, we keep it, I guess.”
The Federal Reserve slashed its key benchmark interest rate for the third time this year. The 0.25 percentage point cut was meant to calibrate the borrowing costs to stay within a range between 3.5% and 3.75%. The 9-3 vote by the central bank’s board of governors amounted to what Wall Street calls a hawkish cut, a move to prop up a cooling labor market while signaling strong concerns about future downward adjustments that’s considered so rare CNBC previously questioned whether it could be real. But it’s good news for clean energy. As Heatmap’s Matthew Zeitlin wrote after the September rate cut, lower borrowing costs “may provide some relief to renewables developers and investors, who are especially sensitive to financing costs.” But it likely isn’t enough to wipe out the effects of Trump’s tariffs and tax credit phaseouts.
GE Vernova plans to increase its capacity to manufacture gas turbines by 20 gigawatts once assembly line expansions are completed in the middle of next year. But in a presentation to investors this week, the company said it’s already sold out of new gas turbines all the way through 2028, and has less than 10 gigawatts of equipment left to sell for 2029. It’s no wonder supersonic jet startups, as I wrote about in yesterday’s newsletter, are now eyeing a near-term windfall by getting into the gas turbine business.
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The European Union will free more than 80% of the companies from environmental reporting rules under a deal struck this week. The agreement between EU institutions marks what Politico Europe called a “major legislative victory” for European Commission President Ursula von der Leyen, who has sought to make the bloc more economically self-sufficient by cutting red tape for business in her second term in office. The rollback is also a win for Trump, whose administration heavily criticized the EU’s green rules. It’s also a victory for the U.S. president’s far-right allies in Europe. The deal fractured the coalition that got the German politician reelected to the EU’s top job, forcing her center-right faction to team up with the far right to win enough votes for secure victory.
Ravaged by drought, Iran is carrying out cloud-seeding operations in a bid to increase rainfall amid what the Financial Times clocked as “the worst water crisis in six decades.” On Tuesday, Abbas Aliabadi, the energy minister, said the country had begun a fresh round of injecting crystals into clouds using planes, drones, and ground-based launchers. The country has even started developing drones specifically tailored to cloud seeding.
The effort comes just weeks after the Islamic Republic announced that it “no longer has a choice” but to move its capital city as ongoing strain on water supplies and land causes Tehran to sink by nearly one foot per year. As I wrote in this newsletter, Iranian President Masoud Pezeshkian called the situation a “catastrophe” and “a dark future.”
The end of suburban kids whiffing diesel exhaust in the back of stuffy, rumbling old yellow school buses is nigh. The battery-powered bus startup Highland Electric Fleets just raised $150 million in an equity round from Aiga Capital Partners to deploy its fleets of buses and trucks across the U.S., Axios reported. In a press release, the company said its vehicles would hit the streets by next year.
Cities across the state are adopting building codes that heavily incentivize homeowners to make the switch.
A quiet revolution in California’s building codes could turn many of the state’s summer-only air conditioners into all-season heat pumps.
Over the past few months, 12 California cities have adopted rules that strongly incentivize homeowners who are installing central air conditioning or replacing broken AC systems to get energy-efficient heat pumps that provide both heating and cooling. Households with separate natural gas or propane furnaces will be allowed to retain and use them, but the rules require that the heat pump becomes the primary heating system, with the furnace providing backup heat only on especially cold days, reducing fossil fuel use.
These “AC2HP” rules, as proponents call them, were included in a routine update of California building codes in 2024. Rather than make it mandatory, regulators put the heat pump rule in a package of “stretch codes” that cities could adopt as they saw fit. Moreno Valley, a city in Riverside County, east of Los Angeles, was the first to pass an ordinance adopting the AC2HP code back in August. A steady stream of cities have followed, with Los Gatos and Portola Valley joining the party just last week. Dylan Plummer, a campaign advisor for Sierra Club's Building Electrification Campaign, expects more will follow in the months to come — “conversations are moving” in Los Angeles and Sacramento, as well, he told me.
“This is a consumer protection and climate policy in one,” he said. As California gets hotter, more households in the state are getting air conditioners for the first time. “Every time a household installs a one-way AC unit, it’s a missed opportunity to install a heat pump and seamlessly equip homes with zero-emission heating.”
This policy domino effect is not unlike what happened in California after the city of Berkeley passed an ordinance in 2019 that would have prohibited new buildings from installing natural gas. The Sierra Club and other environmental groups helped lead more than 70 cities to follow in Berkeley’s footsteps. Ultimately, a federal court overturned Berkeley’s ordinance, finding that it violated a law giving the federal government authority over appliance energy usage. Many of the other cities have since suspended their gas bans.
Since then, however, California has adopted state-wide energy codes that strongly encourage new buildings to be all-electric anyway. In 2023, more than 70% of requests for service lines from developers to Pacific Gas & Electric, the biggest utility in the state, were for new all-electric buildings. The AC2HP codes tackle the other half of the equation — decarbonizing existing buildings.
A coalition of environmental groups including the Sierra Club, Earthjustice, and the Building Decarbonization Coalition are working to seed AC2HP rules throughout the state, although it may not be easy as cost-of-living concerns grow more politically charged.
Even in some of the cities that have adopted the code, members of the public worried about the expense. In Moreno Valley, for instance, a comparatively low-income community, six out of the seven locals who spoke on the measure at a meeting in August urged elected officials to reject it, and not just because of cost — some were also skeptical of the technology.
In Glendale, a suburb of Los Angeles which has more socioeconomic diversity, all four commenters who spoke also urged the council to reject the measure. In addition to cost concerns, they questioned why the city would rush to do something like this when the state didn’t make it mandatory, arguing that the council should have held a full public hearing on the change.
In Menlo Park, on the other hand, which is a wealthy Silicon Valley suburb, all five speakers were in support of the measure, although each of them was affiliated with an environmental group.
Heat pumps are more expensive than air conditioners by a couple of thousands of dollars, depending on the model. With state and local incentives, the upfront cost can often be comparable. When you take into account the fact that you’re moving from using two appliances for heating and cooling to one, the equipment tends to be cheaper in the long run.
The impacts of heat pumps on energy bills are more complicated. Heat pumps are almost always cheaper to operate in the winter than furnaces that use propane or electric resistance. Compared to natural gas heating, though, it mostly depends on the relative cost of gas versus electricity. Low-income customers in California have access to lower electricity rates that make heat pumps more likely to pencil out. The state also recently implemented a new electricity rate scheme that will see utilities charge customers higher fixed fees and lower rates per kilowatt-hour of electricity used, which may also help heat pump economics.
Matthew Vespa, an senior attorney at Earthjustice described the AC2HP policy as a way to help customers “hedge against gas rates going up,” noting that gas prices are likely to rise as the U.S. exports more of the fuel as liquified natural gas, and also as gas companies lose customers. “It’s really a small incremental cost to getting an AC replaced with a lot of potential benefits.”
The AC2HP idea dates back to a 2021 Twitter thread by Nate Adams, a heat pump installer who goes by the handle “Nate the House Whisperer.” Adams proposed that the federal government should pay manufacturers to stop producing air conditioners and only produce heat pumps. Central heat pumps are exactly the same as air conditioners, except they provide heating in addition to cooling thanks to “a few valves or ~$100-300 in parts,” Adam said at the time.
The problem is, most homeowners and installers are either unfamiliar with the technology or skeptical of it. While heat pumps have been around for decades and are widespread in other parts of the world, especially in Asia, they have been slower to take off in the United States. One reason is the common misconception that they don’t work as well as furnaces for heating. Part of the issue is also that furnaces themselves are less expensive, so heat pumps are a tougher sell in the moment when someone’s furnace has broken down. Adams’ policy pitch would have given people no choice but to start installing heat pumps — even if they didn’t use them for heating — getting a key decarbonization technology into homes faster than any rebate or consumer incentive could, and getting the market better acquainted with the tech.
The idea gained traction quickly. An energy efficiency research and advocacy organization called CLASP published a series of reports looking at the potential cost and benefits, and a manufacturer-focused heat pump tax credit even made its way into a bill proposal from Senator Amy Klobuchar in the runup to the 2022 Inflation Reduction Act. While rules that target California homeowners obviously won’t have the nation-wide effect that Adams’ would have, they still have the potential to send a strong market signal, considering California is the fifth largest economy in the world.
The AC2HP codes, which start going into effect next year, will help smooth the road to another set of building electrification rules that will apply in some parts of the state beginning in 2029. At that point, households in the Bay Area will be subject to new air quality standards that require all newly installed heating equipment to be zero-emissions — in other words, if a family’s furnace breaks down, they’ll have to replace it with a heat pump. State regulators are developing similar standards that would apply statewide starting in 2035. The AC2HP rule ensures that if that same family’s air conditioner breaks between now and then, they won’t end up with a new air conditioner, which would eventually become redundant.
The rule is just one of a bunch of new tools cities are using to decarbonize existing buildings. San Francisco, for example, adopted an even stricter building code in September that requires full, whole-home electrification when a building is undergoing a major renovation that includes upgrades to its mechanical systems. Many cities are also adopting an “electrical readiness” code that requires building owners to upgrade their electrical panels and add wiring for electric vehicle charging and induction stoves when they make additions or alterations to an existing building.
To be clear, homeowners in cities with AC2HP laws will not be forced to buy heat pumps. The code permits the installation of an air conditioner, but requires that it be supplemented with efficiency upgrades such as insulating air ducts and attics — which may ultimately be more costly than the heat pump route.
“I don’t think most people understand that these units exist, and they’re kind of plug and play with the AC,” said Vespa.