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Five findings from an extremely thorough study by the National Renewable Energy Lab.
Some Americans install heat pumps because they care about climate change. But most people aren’t going to make the switch until it makes sense economically. Pinpointing where and for whom heat pumps are a good investment is surprisingly tricky because U.S. housing is so diverse, with a wide range of building sizes and ages, situated in different local climates with different utility rates.
But for the first time, researchers at the National Renewable Energy Lab have sorted through much of this complexity to get deeper to the truth about the costs, benefits, and challenges of deploying heat pumps in the U.S.
Ultimately, they found that heat pumps are a cost-effective choice in roughly 65 million U.S. homes, or about 60% of the country — and that’s before taking into account available subsidies. But there are substantial economic barriers to widespread adoption.
It’s hard to overstate how detailed the study is. The authors started with a model of 550,000 statistically representative households — basically housing archetypes that typify different combinations of building size, age, occupancy level, local climate, heating usage patterns, and existing heating systems. Each one represents about 242 real-world households. Then the authors looked at how switching to a heat pump would affect greenhouse gas emissions and energy bills across all of these different homes in a wide range of scenarios. They considered heat pumps with lower and higher efficiency ratings, and whether or not the building owner pursued insulation upgrades. They looked at different scenarios for how quickly the grid would decarbonize, how sensitive the results were to energy prices, and how subsidies from the Inflation Reduction Act affect the economics.
The paper has many interesting findings beyond the top-line result. Here are five things that stood out.
Eric Wilson, a senior research engineer at NREL and the study’s lead author, told me one of his motivations was to try to settle the question of whether heat pumps reduce emissions.
“I see a lot of people saying, well, the grid is still dirty in this state, and maybe it makes sense to wait five years to put in a heat pump because it could increase emissions,” he said.
But he found that in each of the 48 contiguous U.S. states, switching to a heat pump reduces emissions today, even if that heat pump is one of the cheaper, less-efficient models. Heat pumps are just so much more efficient than other options that they still reduce emissions despite today’s relatively dirty grid.
On average, each home could cut between 2.5 to 4.4 tons of carbon over the approximately 16 years the equipment lasts, meaning widespread adoption could result in a 5% to 9% drop in national economy-wide emissions. The effect is much more pronounced in some states, like those in the Northeast, where a lot of homes currently use fossil fuels for heating. A household in Maine that installs a high efficiency model, combined with completing insulation upgrades, would reduce emissions by an average of 11 tons per year — or about the equivalent of taking two cars off the road for a year.
The study breaks down the costs of switching to a heat pump in a few different ways.
First, there’s the up-front costs of upgrading to a heat pump, which are relatively high. A lower-rated, less efficient heat pump system may be a cheaper option than a new furnace or boiler for about 43% of households. But a higher-performing heat pump is almost always more expensive, costing an extra $8,000 to $13,000 before government subsidies (more on them later). That alone might keep heat pumps out of reach for many households.
Next, there's the potential for bill savings — which is significant. Using state average electricity and gas rates in the winter of 2021 to 2022, the study found that 86% of households can save money on their utility bills by switching to a medium-efficiency heat pump, and a whopping 95% of households will see their bills go down if they install the highest efficiency system.
So in theory, if homeowners do have the extra cash to put down, there’s a chance they could make up for high up-front costs in bill savings over time. But how good a chance?
Putting this all together, the authors looked at what percentage of households that upgraded to heat pumps would see a positive cash flow, calculated as the “net present value,” from the initial investment. Here, the results were less rosy. In many cases, high up-front costs cancel out potential savings. For example, despite the near-certain bill savings from buying one of the most efficient heat pump models, only 21% of households would see an overall economic benefit from the switch.
Still, more than half of all homes would see a positive cash flow by switching to a cheaper, minimum-efficiency heat pump.
Distribution of energy bill savings, upgrade costs, and unsubsidized net present value, relative to a reference equipment replacement scenario, using energy prices from winter 2021 to 2022 Courtesy NREL / Wilson et al., Heat pumps for all? Distributions of the costs and benefits of residential air-source heat pumps in the United States, Joule (2024), https://doi.org/10.1016/j.joule.2024.01.022
These findings underscore the importance of bringing down the cost of more efficient heat pump models, which are out of reach for many Americans but can provide significant energy bill savings. The authors suggest that policymakers can help by deploying incentives more strategically and pursuing research on “lower-cost, higher performance, and easier to install equipment.” There also may be opportunities for bulk purchasing and aggregating installations across an apartment building or neighborhood.
When it comes to bill savings, the study found that those who have systems that run on propane, fuel oil, or electric resistance heaters will pretty much always lower their bills by switching to a heat pump, no matter how efficient it is. But those who use natural gas are far more likely to lower their bills if they can afford to switch to one of the pricier, better-performing heat pumps — which cuts into the value proposition.
The following maps show the percentage of homes in each state that would see a positive cash flow from switching to a heat pump, looking at those switching from natural gas, electric resistance, or fuel oil and propane, illustrating how the value proposition is most challenging for those using natural gas.
Percentage of homes that currently have air conditioning that will see a positive cash flow from switching to a heat pump from natural gas, electricity, and fuel oil and propane. Courtesy NREL / Wilson et al. 2024
The authors also note that fixed charges on natural gas bills can play a significant role in the economics of switching to a heat pump. Most natural gas utilities charge customers a fixed amount each month, regardless of how much gas they use. If a homeowner switches to heat pumps but continues using gas for cooking, they’ll still have to pay the full fee, which can be as high as $34 a month, whereas homes that fully electrify can avoid these fees.
The results I described in the previous two sections include homes both with and without existing air conditioning systems of some kind. (With the exception of the maps, which only consider homes that have air conditioning already.)
But since heat pumps provide both heating and cooling, the economics are actually quite different for those households who already have air conditioners versus those who don't. If a household already has A/C, heat pumps appear more favorable, because a family would be able to replace two systems — an air conditioner and a furnace — with just one. If there is no pre-existing air conditioner, the heat pump will not only have higher up-front costs, but it’s more likely to increase energy bills, since the family might start using the heat pump for cooling in addition to heating.
Here are the same maps included in the previous section, but looking just at homes that do not have air conditioning.
Percentage of homes that do not have air conditioning that will see a positive cash flow from switching to a heat pump. The first column is homes that currently use natural gas, the second column is those that us electricity, and the third is those that use fuel oil and propane. Courtesy NREL / Wilson et al. 2024
There are basically zero cases where a house with natural gas heating, and no A/C, will save by switching to a heat pump. However, that result doesn’t take into account the benefits of getting air conditioning for the first time.
“They didn't include the new value that someone has, especially in a warming world and a world with more heat waves, of now having an air conditioner in your home,” Kevin Kircher, an assistant professor of mechanical engineering at Purdue University, told me. “So if you add that in, I think the economics look better.”
None of the results in the previous sections take into account the various subsidies that states and the federal government offer for heat pumps. For example, the Inflation Reduction Act included a $2,000 tax credit for heat pumps and an additional $11,500 in rebates for low- and moderate-income households. Both will increase the percentage of households for whom the investment will pencil out.
The study also doesn’t take into account the potential for homes to use smart controls that optimize their systems, or the opportunity for households to participate in demand response programs which will pay them to turn down their thermostats by a few degrees when the grid is taxed. Kircher, the Purdue professor, recently published a study of a real-world house in a cold climate where smart controls reduced heating energy costs by 23-34%.
Finally, one big takeaway from the study was that the results are very sensitive to the price ratio between natural gas rates and electricity rates, and there are reasons to believe that may become more favorable. For example, as more renewable energy is deployed, electricity could become more affordable. Meanwhile, if the U.S. increases exports of liquified natural gas, the cost of domestic natural gas could go up. The study cites a 2022 survey of oil and gas executives which found that 69% expect ‘‘the age of inexpensive U.S. natural gas to end by year-end 2025.”
“Big modeling like this entails a lot of assumptions about the future that are really hard to pin down with any real precision,” said Kircher. “But I think there's cause for optimism there.”
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Current conditions: Yosemite could get 9 inches of snow between now and Sunday • Temperatures will rise to as high as 104 degrees Fahrenheit in Ashgabat, Turkmenistan, as Central and Southeast Asia continue to bake in a heatwave • Hail, tornadoes, and severe thunderstorms will pummel the U.S. Heartland into early next week.
It was a busy week of earnings calls for the clean energy sector, which, as a whole, saw investment dip by nearly $8 billion in the first three months of the year. Tariffs — especially as they impact the battery supply chain — as well as changes to federal policy under the new administration and electricity demand were the major themes of the week, my colleague Matthew Zeitlin wrote.
Like companies across many different sectors, inverter and battery maker Enphase, turbine manufacturer GE Vernova, Tesla, and the utility NextEra all mentioned the tariffs in their earnings reports and calls. Enphase, for one, is bracing for as much as 8% knocked off its gross margin by the third quarter, while Tesla’s highly-anticipated call managed expectations for the rest of the year, with the company citing the difficulty measuring “the impacts of global trade policy on the automotive and energy supply chains, our cost structure, and demand for durable goods and related services.” Meanwhile, on Thursday, Xcel Energy — which recently reached settlements for its role in the ignition of the most destructive wildfire in Colorado history and the largest wildfire in Texas history — reported missing first-quarter estimates and feeling the squeeze of high interest rates at a time of soaring, data-center-driven electricity demand.
The Department of Justice’s lawyers warned the Department of Transportation that its case against New York City’s congestion pricing program is likely a loser. We know this because someone mistakenly uploaded the DOJ’s memo into the court record for the Metropolitan Transportation Authority’s lawsuit challenging Transportation Secretary Sean Duffy’s actions. Whoops.
As my colleague Emily Pontecorvo reports, the leaked memo was dated before Duffy announced “he would put a moratorium on any new federal approvals for transit projects in Manhattan until the state shut down the tolling program.” But as Emily goes on to say, the memo “warns that continuing down this route could open up both the department and Duffy personally to further probes.” The New York Times adds that the DOT has since replaced the DOJ lawyers who authored the memo and plans to transfer the case to the civil division of the Justice Department in Washington.
More than 100 new cars and vehicles are expected to debut at the 2025 Shanghai Auto Show, which began on Wednesday and runs through next Friday. Of the approximately 1,300 total vehicles on display, 70% are new energy vehicles, according to Gu Chunting, the vice chairman of the Council for the Promotion of International Trade Shanghai, one of the event’s organizers.
The show is already off to an exciting start. Volkswagen is showcasing 50 new models, including three electrified concept vehicles specifically targeted at the Chinese market: the ID. Aura sedan, the ID. Evo SUV, and ID. Era three-row SUV, a hybrid with over 621 miles of range. BYD’s Denza line also premiered its Z, a luxury electric vehicle designed to compete with Tesla and Porsche. “Beauty is in the eye of the beholder, of course, but most people will find the Denza Z to be drop dead gorgeous,” Clean Technica raved.
That’s not all. The Faw Group, a Chinese state-owned car manufacturer, showed off a flying vehicle with a range of 124 miles, while fellow Chinese automaker Changan Automobile announced an autonomous flying car that reportedly already has government approval to transport passengers, per IoT World Today. France’s Le Monde was wowed by China’s innovations all around: “Gone are the days when the vast exhibition space had one hall dedicated to foreign brands and another for Chinese ones. Today, each Chinese group occupies a hall, showcasing domestic brands and leaving only some space for foreigners around the edges.”
Volkswagen
In a private ceremony Thursday night, President Trump signed an executive order to “unleash” deep-sea mining. The order — which directs the secretaries of Interior and Commerce to accelerate “the process of renewing and issuing seabed mineral exploration licenses and commercial recovery permits” for the U.S. Outer Continental Shelf and “areas beyond national jurisdiction”— is an attempt to offset China’s dominance of the critical minerals supply chain. Deep-sea mining operations harvest “nodules” that take millions of years to form and contain minerals like nickel, copper, cobalt, and manganese necessary for lithium-ion batteries for electric vehicles, among other applications. “For too long, we’ve been over reliant on foreign sources, and today this historic announcement marks a big step in the right direction to onshore these resources that are critical to national homeland security,” a senior administration official told reporters on Thursday, as reported by CNN.
Deep-sea mining is controversial due to how little we know about the ocean’s abyss, including the potential impact of large-scale mining operations on marine biodiversity and carbon sequestration. The United States has largely abstained from the deliberations of the United Nations’ International Seabed Authority, which determines whether and how to mine the seabed for critical minerals. The industrial mining of international waters, as cued up by Trump’s executive order, is opposed by “nearly all other nations,” The New York Times writes, and is “likely to provoke an outcry from America’s rivals and allies alike.”
It has already been a tragic year for wildfires, with more than 57,000 acres of Los Angeles and the surrounding hillsides burned in January. Now, AccuWeather is predicting that fires in the U.S. could “rapidly escalate” and burn up to 9 million acres total this year, well above the historic average of 7 million acres and close to the 8.9 million acres that burned in 2024.
Specifically, AccuWeather predicts an extreme fire season in the Northwest, northern Rockies, Southwest, and South Central states, particularly as late summer and fall approach. “There was plenty of rain and snow across Northern California this winter. All of that moisture has supported a lot of lush vegetation growth this spring,” AccuWeather’s lead long-range expert, Paul Pastelok, said. “That grass and brush will dry out and become potential fuel for wildfires this fall,” when any “trigger mechanism … could cause big wildfire problems.”
AccuWeather
Slate Auto, a three-year-old Jeff Bezos-backed startup, has announced an EV truck that will cost less than $20,000 after the federal tax credit and before customization. “It’s the Burger King of trucks,” writes Car and Driver, because “it’s affordable” and “lets customers ‘have it their way’ with a lengthy accessory list, including one that turns this pickup into an SUV.”
Three weeks after “Liberation Day,” Matador Resources says it’s adjusting its ambitions for the year.
America’s oil and gas industry is beginning to pull back on investments in the face of tariffs and immense oil price instability — or at least one oil and gas company is.
While oil and gas executives have been grousing about low prices and inconsistent policy to any reporter (or Federal Reserve Bank) who will listen, there’s been little actual data about how the industry is thinking about what investments to make or not make. That changed on Wednesday when the shale driller Matador Resources reported its first quarter earnings. The company said that it would drop one rig from its fleet of nine, cutting $100 million of capital costs.
“In response to recent commodity price volatility, Matador has decided to adjust its drilling and completion activity for 2025 to provide for more optionality,” the company said in its earnings release.
In February, Matador was projecting that its capital expenditures in 2025 would be between $1.4 and $1.65 billion.This week, it lowered that outlook to $1.3 to $1.55 billion. “We’re very open to and want to have reason to grow again,” Matador’s chief executive Joseph Foran said on the company’s earnings call Thursday. “This is primarily a timing matter. Is this a temporary thing on oil prices? Or is this a new world we live in?”
Mizuho Securities analyst William Janela wrote in a note to clients Thursday morning that, as the first oil exploration and production company to report its earnings this go-round, Matador would be “somewhat of a litmus test for the sector: we don't believe the market was expecting E&Ps to announce activity reductions this soon, but MTDR's update could signal more cuts to come from peers over the next few weeks.”
West Texas Intermediate crude oil prices are currently sitting at just below $63, up from around $60 in the wake of President Donald Trump’s “Liberation Day” tariff announcements. While the current price is off its lows, it’s still well short of the almost $84 a barrel crude prices were at around this time last year.
The price decline could be attributable to any number of factors — macroeconomic uncertainty due to the trade war, production hikes by foreign producers — but whatever the cause, it has made an awkward situation for the Trump administration’s energy strategy.
The iShares U.S. Oil & Gas Exploration & Production ETF, which tracks the American oil and gas exploration industry, is down 9% for the year and more than 13% since “Liberation Day,” while the rest of the market has almost recovered as the Trump administration has indicated it may ease up on some of his more drastic tariff policies.
If other drillers follow Matador’s investment slowdown, it could imperil Trump’s broader energy policy goals.
Trump has both encouraged other countries to produce more oil (and bragged about lower oil prices) while also exhorting American drillers to “drill, baby, drill,”with enticements ranging from kneecapping emissions standards to a reduced regulatory burden.
As Heatmap has written, these goals sit in conflict with each other. Energy executives told the Federal Reserve Bank of Dallas that they need oil prices ranging from $61 to $70 a barrelin order to profitably drill new wells. If prices fall further, “what would happen is ‘Delay, baby, delay,’”Wood Mackenzie analyst Fraser McKay wrote Wednesday. “We now expect global upstream development spend to fall year-on-year for the first time since 2020.”
A $65 per barrel price “dents” margins for drillers, meaning “growth capex and discretionary spend will be delayed,” McKay wrote.
Matador also announced that it had authorized $400 million worth of buybacks, and itsstock price rose some 4% on the earnings announcement, indicating that Wall Street will reward drillers who pull back on drilling and ramp up shareholder payouts.
“We’ve got the tools in the toolbox, including the share repurchase, to make Matador more value quarter by quarter,” Foran said. Rather than “blindly” pouring capital into growth, Matador would aim for a “measured pace,” he explained. “And if you mean what you say about a measured pace, that means when prices get a little lower, you take a few more moments to think about what you’re doing and don’t rush into things.”
At San Francisco Climate Week, everything is normal — until it very much isn’t.
San Francisco Climate Week started off on Monday with an existential bang. Addressing an invite-only crowd at the Exploratorium, a science museum on the city’s waterfront, former vice president and long-time climate advocate Al Gore put the significance and threat of this political moment — and what it means for the climate — in the most extreme terms possible. That is to say, he compared the current administration under President Trump to Nazi Germany.
“I understand very well why it is wrong to compare Adolf Hitler’s Third Reich to any other movement. It was uniquely evil,” Gore conceded before going on: “But there are important lessons from the history of that emergent evil.” Just as German philosophers in the aftermath of World War II found that the Nazis “attacked the very heart of the distinction between true and false,” Gore said, so too is Trump’s administration “trying to create their own preferred version of reality,” in which we can keep burning fossil fuels forever. With his voice rising and gestures increasing in vigor, Gore ended his speech on a crescendo. “We have to protect our future. And if you doubt for one moment, ever, that we as human beings have that capacity to muster sufficient political will to solve this crisis, just remember that political will is itself a renewable resource.”
The crowd went wild. Former House Speaker Nancy Pelosi took the stage and reminded the crowd that Gore has been telling us this for decades — maybe it’s time we listen. But I missed all that. Because just a few miles away, things were getting a little more in the weeds at the somewhat less exclusive venture capital-led panel entitled “The Economics of Climate Tech: Building Resilient, Scalable, and Sustainable Startups.” Here, I learned about a new iron-sodium battery chemistry and innovations in transformers for data centers, microgrids, and EV charging infrastructure.
I heard Tom Chi, founding partner of At One Ventures, utter sentences such as “parity dies because of capex inertia,” referring to the need to make clean tech not only equivalent to but cheaper than fossil-fuels on a unit economics basis. Such is the duality of climate week during the Trump administration — occasionally lofty in both its alarm and its excitement, but more often than not simply business-as-usual, interrupted by bouts of heady doom or motivational proclamations.
Some panels, like the one I moderated on the future of weather forecasting using artificial intelligence, made it a full hour without discussing Trump, tariffs, or tax credits at all. So far, that’s held true for a number of talks on how AI can be a boon to climate tech. It makes sense — the administration is excited about AI, and there’s really no indication that Trump has given any thought to either the positive or negative climate externalities of it.
But rapid data center buildout and the attendant renewables boom that it may (or may not) bring will certainly be influenced by the administration’s fluctuating policies, an issue that was briefly discussed during another panel: “AI x Energy: Gridlocked or Grid Unlocked?” Here, representatives from Softbank, Pacific Gas & Electric, and the data center builder and operator Switch touched on how market uncertainty is making it difficult to procure energy for data centers — and to figure out the cost of building a data center, period.
“There is a lot of refiguring and rereading contracts and looking at the potential exposure to things like the escalation in the cost of steel for construction projects,” Skyler Holloway of Switch said. Pinning down a price on the energy required to power data centers is also a bottleneck, Gillian Clegg, vice president of energy policy and procurement at PG&E explained. “For projects that want to connect between now and 2030, any kind of uncertainty or delay means that the generation doesn't get to the market,” Clegg said. “Maybe the load gets there first, and you have an out of balance situation.”
Everyone acknowledges that uncertainty is bad for business, and that delays related to funding, contracts, and construction can kill otherwise viable companies. But unsurprisingly, nobody here has admitted that said uncertainty might put them out of business, or even deeply in the red.Every panel I attend, I find myself wondering whether a founder or investor is finally going to raise their voice, à la Al Gore, and tell the audience that while their company’s business model is well and good, the Trump administration’s illogical antipathy towards green-coded tech and ill-conceived trade war is throwing the underlying logic — sound as it may have been just a year ago — into disarray.
None of the seven energy, food, and agricultural startups that presented at the nonprofit climate investor Elemental Impact’s main show, for instance, discussed the impacts of the administration’s policies on their businesses. Rather, they maintained a consistently upbeat tone as they described the promise of their concepts — which ranged from harnessing ocean energy to developing plant-based fertilizers to using robotics for electronics recycling — and the momentum building behind them. Nuclear and geothermal companies, seemingly poised to be the clean tech winners of Chris Wright’s Department of Energy, have been especially optimistic this week.
But really, what else can climate tech companies and investors be expected to do right now besides, well, rise and grind? It’s not like anybody has answers as to what’s coming down the policy pike. In a number of more casual conversations this week, a common sentiment I heard was that it’s not necessarily a bad time to be an early-stage startup — keep your head down, focus on research and prototyping, and reassess the political environment when you’re ready to build a pilot or demonstration plant. As for later-stage companies and venture capital firms, they’re likely working to ensure that their business models and portfolios really aren’t dependent on government subsidies, grants, or policies — as they keep assuring me is the case.
Even that might not be enough these days though. Chi said he’s always tailored his investments with At One Ventures towards companies that are viable based on unit economics alone, no subsidies and no green premium. So he wasn’t initially worried about his portfolio when Trump was elected. “None of our business models were invalidated by the election,” he said. “The only way that we could be in trouble is if they mess it up so bad that it ruins all of business, not just climate …”
Oops.
If there’s one dictum that I would expect to hold, though, it’s that the startups that make it through this period will likely be around for the long haul. I’ve been hearing that sentiment since the election, and Mona ElNagger, a partner at Valo Ventures, echoed it once again this week. “Microsoft and Apple were founded in the mid 1970s, which was a time of severe recession and stagflation. Amazon started at the tail end of a big recession in the early 1990s,” ElNagger reminded the audience at the Economics of Climate Tech panel, which she moderated. “Companies that survive and actually thrive in such periods share a common thread of resilience.”
As that panel wrapped up, things got existential once more as Chi’s talk moved from describing his investment thesis to the moment at large. “This time period in history is going to bring us tragedy after tragedy, and it’s really that moment that we’re going to understand the deep underlying structure of half of the world that we’ve built, and also the character of who we are,” Chi told the audience. It was unclear whether we were even talking about climate tech anymore. Chi continued, “It’s in that time period that we are going to step up and become whatever we are meant to be or not at all.”
The crowd sat there, a little stunned. Were we, in this very moment, becoming who we were meant to be? I took a bite of my free sushi as the networking and hobnobbing began.