Heat pumps take majority share of new US apartment builds, reshaping winter load forecasts
Heat pumps reached 53% of new US apartment complexes, up from 46% in 2024, compressing the seasonal load shape utilities have long relied on.
Heat pumps accounted for 53% of new apartment complexes in the United States, up from 46% in 2024, marking the first time the technology has captured a majority of the multifamily new-build market. Winter peak demand is becoming an electric problem, not just a gas one, for utilities and grid operators planning capacity through the end of the decade.4
The same appliance that heats in winter also cools in summer, which compresses the seasonal load shape utilities have long relied on. A decade ago, two conventional air-conditioning systems were sold for every heat pump in the US market; that ratio has now flipped, according to data from the Air-Conditioning, Heating, and Refrigeration Institute.4
The sales data show the pace of change is still modest on a unit basis. Heat pump sales are up about 1% year-on-year, while AC sales are down nearly 8%, the trade group said.4 The bigger story is in new construction, where builders are standardizing on heat pumps for both functions rather than installing separate systems.
For gas utilities, the trend cuts against the industrial demand growth that has been propping up consumption. Industrial consumption averaged a record 23.6 billion cubic feet per day (Bcf/d) in 2025, 1% above the prior record of 23.4 Bcf/d set in 2023, per EIA data. Residential and commercial space heating is the other big gas load, and it is the segment now facing electrification pressure.1
The American Council for an Energy-Efficient Economy released a report on Wednesday (2026-07-15) modeling what a full push toward efficient electric equipment would do to the system. It found the US could cut energy costs by an average of $215 billion a year, or $4.8 trillion cumulatively by 2050, if policymakers adopted measures across buildings, industry and transport.5
About half of the modeled $439 billion in annual savings by 2050 comes from the building sector alone, led by heat pump adoption and high-efficiency appliances. The report assumes a 100% switch to heat pumps for heating in new buildings by 2035, a policy target that would accelerate the current market trajectory considerably.5
The demand-flexibility side of the equation is where the grid math gets complicated. ACEEE assumed demand-response programs could reduce overall peak demand by 20% by 2050, with at least one large operator, Google, already running voluntary programs across its data centers and offices. Replicating that on residential heat pump loads at scale remains an open operational challenge.5
Data centers are adding pressure from the other direction. EIA's Annual Energy Outlook 2026 projects server electricity consumption will reach between 446 billion kilowatthours (BkWh) and 818 BkWh by 2050, up from an estimated 7% of commercial sector electricity use in 2025 to between 22% and 33% by mid-century. Heat pumps in apartments and servers in warehouses are both adding to the same winter peak.1
The European experience offers a cautionary parallel. European Commission president Ursula von der Leyen said the EU spent an additional €24 billion on energy imports in less than two months, with heat pump uptake rising across the bloc as consumers moved to cut gas bills. ICE Endex TTF front-month traded at €63.41/MWh on Thursday (2026-08-20), keeping the electrification incentive intact for European buyers.2
In the US, the price signal is weaker. NYMEX Henry Hub front-month sat at $2.75/MMBtu on Thursday (2026-08-20), cheap enough that the operating-cost argument for heat pumps depends heavily on local electricity rates and climate zone. The ACEEE savings estimates assume policy intervention to close that gap, not current market prices.5
The buildout of new pipeline capacity through 2027, with roughly 70% of 31.6 Bcf/d of additions already under construction and more than 66% originating in Texas, suggests the gas industry is betting on industrial and export demand rather than residential heating. That bet looks increasingly exposed as multifamily builders lock in heat pumps as the default specification.3
The near-term market effect is muted. Heat pump sales growth of 1% does not move gas demand materially this year. But the composition of new-build heating stock is a leading indicator for winter peak load five to ten years out, and the direction is unambiguous.4
The summer peak is where the calculation gets asymmetric. Heat pumps displacing AC units are load-neutral in July, but heat pumps replacing gas furnaces add winter electric load with no offsetting gas credit. ERCOT's solar buildout, projected at 78 BkWh in 2026 against 60 BkWh for coal, helps the summer peak but does nothing for a January morning ramp.1