Heating is a major energy service across homes and commercial buildings, but its scale depends on climate, building type, fuel, equipment and the definition used. The figures below combine U.S. residential and commercial surveys with global estimates and forecasts, keeping measurement periods and scope explicit.
Key Heating Industry Statistics
The most useful headline figures include:
- In 2020, space heating accounted for 42% of U.S. residential-sector energy consumption in the occupied-home end-use estimate.
- In 2020, space heating and air conditioning together represented 52% of average U.S. household annual energy consumption.
- The 2020 U.S. RECS counted 123.53 million primary occupied housing units.
- In 2020, natural gas was the main heating fuel for 62.71 million U.S. homes.
- In 2020, electricity was the main heating fuel for 42.57 million U.S. homes.
- In 2020, central warm-air furnaces were the main heating equipment in 74.42 million U.S. homes.
- In 2020, heat pumps were the main heating equipment in 16.13 million U.S. homes, about 13% of primary occupied units.
- U.S. households spent an average of $519 on space heating in 2020.
- U.S. homes used 549.6 trillion Btu of site electricity for space heating in 2020.
- The United States had about 5.9 million commercial buildings and 96.4 billion square feet of floorspace in 2018.
- U.S. commercial buildings consumed about 6.8 quadrillion Btu of energy in 2018.
- Space heating used 2.2 quadrillion Btu, nearly one-third of U.S. commercial-building energy consumption, in 2018.
- Natural gas supplied 73% of major-fuel space-heating energy in U.S. commercial buildings in 2018.
- Globally, heat pumps supplied 12% of space-heating service demand in 2022 in the IEA net-zero pathway milestone table.
- The IEA pathway targets heat pumps meeting 25% of global space-heating service demand in 2030.
- Modern renewable uses for heat are projected to expand nearly 40% globally from 2023 to 2028.
- Heat-pump installations avoided an estimated 50 billion cubic metres of natural-gas use for building heating across Europe, Japan and China in 2024.
- The IEA space-heating pathway projects building space-heating energy consumption decreasing by almost 70% by 2050 while heated floor area increases 30%.
Contents
- Heating’s role in energy use and demand
- Residential heating fuels and household coverage
- Residential heating equipment and adoption
- Residential heating costs and seasonal consumption
- Commercial-building heating scale and fuel mix
- Global heat-pump and renewable-heat transition
- Heating outlook, efficiency and market direction
Heating Industry Energy Demand and Its Role in Energy Use
Space heating is one of the largest household energy services measured in the United States. The Energy Information Administration (EIA) reported that space heating accounted for 42% of U.S. residential-sector energy consumption in 2020, based on an occupied-home end-use estimate (EIA, “Space heating consumed the most energy of any end use in homes”).
The broader household picture includes cooling and other end uses. In 2020, space heating and air conditioning together accounted for 52% of average U.S. household annual energy consumption, while water heating, lighting and refrigeration together accounted for 25% (EIA, “Use of energy in homes”).
| U.S. residential energy measure | 2020 result | Scope |
|---|---|---|
| Space heating | 42% | Residential-sector energy consumption |
| Space heating plus air conditioning | 52% | Average household annual energy consumption |
| Water heating, lighting and refrigeration | 25% | Household annual energy use |
| Retail electricity purchases | 44% | Residential-sector end-use energy |
Retail electricity purchases supplied about 44% of U.S. residential-sector end-use energy in 2020. Natural gas was used in 58% of homes and supplied about 43% of residential-sector end-use energy, while petroleum supplied about 8% and renewable sources including geothermal, solar energy and wood supplied about 5%; these fuel shares cover multiple end uses, not only space heating (EIA, “Use of energy in homes”).
Heating demand also follows weather. EIA estimated nearly 4,300 population-weighted heating degree days for the United States in 2019, compared with nearly 1,500 cooling degree days; heating degree days measure how often and how far average temperatures fall below 65°F (EIA, “EIA projects air-conditioning energy use to grow faster than any other use in buildings”).
Residential Heating Fuel Statistics and Household Coverage
The 2020 Residential Energy Consumption Survey counted 123.53 million primary occupied housing units. Its scope excludes vacant, seasonal and second homes, military housing and group quarters, so the figures describe occupied U.S. primary housing rather than every dwelling (EIA, “Highlights for space heating in U.S. homes by state, 2020”).
| Main heating fuel | U.S. homes in 2020 |
|---|---|
| Natural gas | 62.71 million |
| Electricity | 42.57 million |
| Propane | 5.21 million |
| Fuel oil or kerosene | 4.93 million |
| Wood | 2.25 million |
Natural gas and electricity were the dominant main heating fuels in 2020. The detailed fuel counts come from EIA’s table on space heating in U.S. homes and refer to main fuel in occupied primary housing units (EIA, “Table HC6.4 Space heating in U.S. homes, by number of household members, 2020”).
A further 5.79 million U.S. homes reported not using heating equipment in 2020, although that does not mean the dwelling never received heat from another source. Secondary heating was also common: 51.80 million homes used secondary heating equipment, while 65.94 million did not (EIA, “Table HC6.4 Space heating in U.S. homes, by number of household members, 2020”).
The fuel mix has changed over earlier RECS rounds. In the 2015 RECS, 5.9 million U.S. homes used fuel oil or kerosene as their main heating fuel, 20% fewer than in the 2009 RECS; this is a comparison of two survey rounds, not a current estimate (EIA, “U.S. households’ heating equipment choices are diverse and vary by climate region”).
Residential Heating Equipment Adoption and Age
Central warm-air furnaces remained the most common main equipment category in 2020, serving 74.42 million U.S. homes. Heat pumps were the main heating equipment in 16.13 million homes, including 1.06 million homes where ductless mini-split heat pumps were the main equipment (EIA, “Table HC6.4 Space heating in U.S. homes, by number of household members, 2020”).
| Main heating equipment | U.S. homes in 2020 |
|---|---|
| Central warm-air furnaces | 74.42 million |
| Heat pumps | 16.13 million |
| Steam or hot-water systems | 9.29 million |
| Portable electric heaters | 3.03 million |
| Ductless mini-split heat pumps | 1.06 million |
The heat-pump figure is about 13% of primary occupied units, and heat pumps can also provide cooling. Portable electric heaters can likewise be used as secondary heat, so equipment categories should not be interpreted as mutually exclusive ownership of every device in a home (EIA, “Table HC6.4 Space heating in U.S. homes, by number of household members, 2020”).
Equipment age shows a mixed replacement landscape. The main heating equipment was less than two years old in 13.29 million U.S. homes in 2020, while it was at least 20 years old in 23.54 million homes; age alone does not measure operating efficiency.
Controls were widespread but not universal. A thermostat was present in 109.45 million U.S. homes in 2020, including 12.78 million with a smart or internet-connected thermostat, and programmable thermostats were present in 52.59 million homes; these are inventories, not measured savings (EIA, “Table HC6.4 Space heating in U.S. homes, by number of household members, 2020”).
Residential Heating Costs and Seasonal Consumption Data
U.S. households spent an average of $519 on space heating in 2020. The average varies by climate and energy source, so it should not be treated as a universal household bill (EIA, “Space heating consumed the most energy of any end use in homes”).
Site electricity used for residential space heating totaled 549.6 trillion Btu in 2020. Monthly consumption was 114.6 trillion Btu in January, 104.8 trillion Btu in February and 133.3 trillion Btu in December, according to the monthly RECS estimate (EIA, “Table CE8.2.M.2020 Monthly household site electricity space heating consumption”).
State and fuel differences can be substantial. Michigan homes averaged 72.7 million Btu of natural-gas space-heating consumption in 2020 among homes using natural gas; this is a Michigan-specific measure of natural-gas space heating, not all heating fuels (EIA, “Space heating consumed the most energy of any end use in homes”).
EIA’s winter 2023–24 forecast illustrates fuel-specific cost exposure. Households heating primarily with electricity were forecast to spend about $1,060 on winter electricity bills, while households heating primarily with heating oil were forecast to use about 440 gallons and spend about $1,850; these were base-case forecasts, sensitive to weather and prices and concentrated for heating oil in the Northeast (EIA, “Winter Fuels Outlook”).
Commercial-Building Heating Scale and Fuel Mix
The 2018 Commercial Buildings Energy Consumption Survey counted about 5.9 million U.S. commercial buildings with 96.4 billion square feet of floorspace. CBECS excludes residential, manufacturing, agricultural and industrial buildings (EIA, “Use of energy in commercial buildings”).
Those buildings consumed about 6.8 quadrillion Btu of energy in 2018. Space heating used 2.2 quadrillion Btu, nearly one-third of commercial-building energy consumption, and average commercial space-heating intensity was 25,000 Btu per square foot (EIA, “Space heating accounted for nearly one-third of U.S. energy consumption in commercial buildings in 2018”).
| Major fuel for commercial space heating | Share of 2,167 trillion Btu in 2018 |
|---|---|
| Natural gas | 73% |
| District heat | 12% |
| Electricity | 11% |
| Fuel oil | 4% |
The fuel shares use a 2,167 trillion Btu major-fuel base that excludes other sources such as propane and wood. An additional 558,000 commercial buildings, or 11% of heated commercial buildings, used other heating sources in 2018 (EIA, “Heating U.S. commercial buildings is most energy intensive in cold climates”).
Climate changes building coverage. In 2018, 62% of commercial buildings in cold or very cold climate zones heated all their floorspace, compared with 40% in hot or very hot zones; this is a climate-zone comparison, not a national average (EIA, “Heating U.S. commercial buildings is most energy intensive in cold climates”).
Global Heat-Pump and Renewable-Heat Transition Statistics
The IEA’s net-zero pathway places heat pumps at 12% of global space-heating service demand in 2022 and targets 25% in 2030. The same pathway shows heat pumps installed in buildings rising from 1,000 GW in 2022 to 3,000 GW in 2030, while heated floor area rises from 157 billion to 170 billion square metres; these are pathway milestones and projections, not annual sales or a census (IEA, “Space heating”).
Renewable heat is also broader than heat pumps alone. Modern renewable uses for space and water heating and cooking are projected to expand nearly 40% from 2023 to 2028, and renewables’ share of buildings-sector heat consumption is projected to rise from 15% to 21%; the IEA definition includes direct renewables, ambient heat, renewable electricity and district-heat components (IEA, “Heat – Renewables 2023”).
The IEA projects renewable heat to displace 5.7 exajoules of fossil-fuel consumption in buildings in 2028. In a separate 2024 estimate, heat-pump installations avoided 50 billion cubic metres of natural-gas use for building heating across Europe, Japan and China; this is an avoided-use counterfactual, not metered consumption (IEA, “Heat – Renewables 2023”; IEA, “Key findings – Heat Pump Monitor 2026”).
Heating Efficiency Outlook and Market Direction
The IEA space-heating pathway projects global building space-heating energy consumption decreasing by almost 70% by 2050 while heated floor area increases 30%. It targets heat pumps meeting 40% of global space-heating service demand in 2035 and 55% in 2050 (IEA, “Space heating”).
The pathway also targets zero-carbon-ready standards in 100% of new buildings and deep renovations by 2030, 2035 and 2050. For the existing building stock, it targets zero-carbon-ready status in 20% by 2030, 35% by 2035 and 80% by 2050; these are retrofit and construction milestones, not observed completion rates (IEA, “Space heating”).
Older U.S. projections point in a similar efficiency direction but must be read as historical forecasts. EIA’s AEO2020 Reference case projected delivered space-heating energy in U.S. residential and commercial buildings to decline by more than 1.5 quadrillion Btu from 2019 to 2050, while total delivered building energy consumption increased 7%; it also projected natural gas at about 70% of U.S. building space-heating energy in 2019 (EIA, “EIA projects air-conditioning energy use to grow faster than any other use in buildings”).
That forecast assumed population growth of more than 58 million people and household growth of 24 million between 2019 and 2050. These are demographic and housing assumptions, not direct measures of heating demand, and the AEO2020 figures are not 2026 observations.