Switching from oil heat to a heat pump

DOE and ENERGY STAR both describe heat pumps as an option for homes that heat with oil. This guide covers EIA's heating oil data and the federal guidance on making the switch. It also covers cold-climate heat pump specs. Seattle has an active oil-to-heat-pump program and clear oil tank rules, so we use it as a detailed example. We did not check rules or programs in other cities and states.

Heating oil in U.S. homes

The U.S. Energy Information Administration (EIA) says, "In the winter of 2023–2024, about 4.79 million households in the United States used heating oil (distillate fuel oil) as the primary heating fuel, and about 82% of those households were in the U.S. Northeast Census Region." Its heating oil page, last updated June 13, 2024, adds that home heating oil use "peaked in the 1970s and has declined nearly every year since." EIA says, "Most new and replacement heating systems in homes use natural gas or electricity."

EIA also says "most heating oil use occurs during the heating season—October through March." It collects prices weekly in those months. From April through September, it collects them once a month, so EIA says "no monthly averages will be available for this period."

EIA's price table, released April 1, 2026, shows the U.S. average residential heating oil price for the 2025–26 season. It ranged from $3.555 per gallon in October 2025 to $5.126 in March 2026, excluding taxes. Data for the 2026–27 season had not been released as of October 2026. EIA's next release is scheduled for October 7, 2026.

Is a heat pump a good replacement for oil heat?

DOE's 2022 Energy Saver Guide says, "Heat pumps are an efficient option for all-electric houses or houses with central propane or oil." ENERGY STAR's heat pump page lists several benefits, including "Lower energy bills by switching from electric resistance, propane, and oil to heat pumps." It also lists "No fuel storage or risk of running out of fuel." ENERGY STAR says that because heat pumps burn no fuel, there are "no direct emissions such as NOx, carbon dioxide, or carbon monoxide." ENERGY STAR gives no savings figure on that page, and we do not estimate one.

A 2017 guide on oil-fired boilers from DOE's Building America Solution Center (BASC) covers the ways to replace an oil boiler. BASC is published by Pacific Northwest National Laboratory for DOE. It says a boiler "can be replaced in-kind or with a different type of system." A moderate change keeps the piping and terminal units and replaces the old boiler with a condensing boiler.

The guide calls a ductless air-source heat pump "a bigger change." It says several models "may now be considered a reasonable replacement in colder regions depending on the climate zone and building enclosure." BASC adds, "Ductless air-source heat pumps eliminate the need to install ducts if no ducts currently exist in the home." Our boiler guide covers federal boiler standards.

Cold-climate heat pump specifications

A 2024 BASC guide says, "Until recently, natural gas, fuel oil, and other combustion heating systems have been preferred over heat pumps in cold climates because they do not lose heating capacity when the outside temperature drops."

The Northeast Energy Efficiency Partnerships (NEEP) and ENERGY STAR each publish cold-climate heat pump criteria. NEEP's Version 4.0 specification, effective January 1, 2023, requires a "COP at 5°F ≥ 1.75 at maximum capacity operation." ENERGY STAR's Version 6.2 heat pump specification (Rev. February 2026) sets Cold Climate levels of at least 15.2 SEER2 and 8.5 HSPF2 for non-ducted split heat pumps. For ducted splits, the levels are at least 15.2 SEER2 and 8.1 HSPF2.

ENERGY STAR says, "Your cold climate ASHP will continue working at temperatures below 5°F, but pairing it with a back-up energy source will heat your home the most efficiently when temperatures are even lower." Our guide to heat pumps vs. furnaces explains these ratings and backup heat in more detail.

Seattle's Clean Heat program, as of October 2026

The City of Seattle's Office of Sustainability & Environment has an undated Clean Heat page. It says, "Heating oil is the least efficient, most expensive, and most polluting form of home heating in Seattle." The city estimates 8,000 to 10,000 homes still heat with oil, "down from approximately 18,000 in 2018." It gives no year for the newer estimate. The city says it "is committed to helping transition all remaining households by 2030."

As of October 2026, the page describes these rebates and terms:

• A "$2,000 instant rebate when you switch from heating your home with oil to heating with an energy-efficient Mitsubishi Electric Heat Pump."
• The city's first step is to "Contact participating contractors for no-cost estimates and select a contractor to install a qualified Mitsubishi electric heat pump."
• A "$4,000 bonus rebate on top of the $2,000" for "moderate-income households earning between 81% - 150% of the Area’s Median Income."
• The city says, "Bonus rebates are available for installations completed by May 30, 2027." The page we checked gives no deadline for the $2,000 rebate.

Income-eligible households have another route. The city's Office of Housing says that for eligible households, improvements "could include: Oil-to-electric heated furnace conversion. Oil tank decommission. General health and safety inspections." Seattle City Light says, "Income-eligible Seattle households can receive a no-cost conversion from oil furnace to an electric heat pump through the Seattle Office of Housing Clean Heat program."

City pages also give heating-cost savings estimates for switching. The figures differ from page to page. None states a method, so we do not repeat them. Programs change, so confirm current terms with the city before you start.

Oil tank decommissioning rules in Seattle

The Seattle Fire Department's Client Assistance Memo 5962, updated March 2024, says, "If you have a residential heating oil tank that is no longer being used, you are required to “decommission” the tank and any piping connected to it." It cites Section 5704.2.13 of the 2021 Seattle Fire Code, which "requires decommissioning of tanks that have been out of service for a year or more."

The memo says Section 105.5.20 "requires that a permit be obtained to remove, abandon, place temporarily out of service or otherwise dispose of a heating oil tank." It says, "Decommissioning can be accomplished by one of two methods: (1) removal, or (2) abandon in place." It adds, "Tanks suspected of leaking should be removed from the ground rather than abandoned in place." The work "must be performed, or directly supervised, by an individual certified by the International Code Council (ICC) as an underground storage tank (UST) decommissioner."

The memo also says that "if a tank has leaked, the Washington State Department of Ecology does have reporting requirements based on the extent of contamination found." A city tank flyer says, "If you discover or suspect a leak, report it within 24 hours to 1-800-OILS-911 and stop all automatic heating oil deliveries."

Washington's heating oil loan and grant program

The Washington State Pollution Liability Insurance Agency (PLIA) runs the Heating Oil Loan and Grant Program. As of October 2026, its fact sheet lists total funding of up to $75,000. To qualify, "you must own the property where the heating oil tank is located and submit a complete HOLG application during an open application period."

PLIA says, "Applications for HOLG are open twice a year, from May-June and November-December." It also says, "PLIA must pre-approve all work before it begins. The agency does not reimburse costs for work that has already been completed." For the Preliminary Planning Assessment, PLIA says it "will assign the consultant to complete the PPA for your project." The fact sheet lists no income condition. We did not check tank rules or programs outside Seattle and Washington State.