Wood heating is used by a substantial minority of U.S. households, but the meaning of “use” varies sharply between occasional burning, secondary heat and primary household heating. The available evidence also spans appliance inventories, fuel estimates, emissions inventories, modeled health effects and local changeout programs, so periods and definitions matter.
Key Wood Heating Statistics
The most broadly useful figures are:
- About 10% of U.S. households burned wood for heat in the 2024 DOE estimate.
- About 2% of U.S. households used wood as their primary heat source on the 2024 DOE RFI page.
- Approximately 13 million U.S. households were equated with the 10% wood-heating estimate in 2024 DOE material.
- Wood was the primary heat source for 1.9% of U.S. homes in the 2018 Census figure cited by DOE.
- About 12.5 million U.S. homes were estimated to use wood or pellets for space heating in the DOE workshop report.
- About 2.7 million U.S. homes were estimated to use wood heaters as primary heaters in that report.
- About 9 million U.S. homes were estimated to use wood heaters as secondary heaters in that report.
- More than 16% of homes used wood as primary heat in some rural U.S. counties in the 2018 Census comparison cited by DOE.
- Approximately 12.5 million wood stoves were estimated to be in use nationwide in the 2018 EIA estimate cited by EPA.
- More than 2 million U.S. wood stoves were estimated to be inefficient, uncertified devices in the 2017 inventory cited by EPA.
- U.S. residential wood consumption fell 15% in January–March 2020 compared with January–March 2019.
- Residential wood combustion ranked as the second-largest contributor to national wintertime PM2.5 emissions in the 2017 EPA-cited inventory.
- EPA reported that residential wood smoke emitted more PM2.5 than on-road and non-road vehicles combined in the 2017 inventory.
- A DOE deck estimated that wood heaters represented about 6% of total annual U.S. PM2.5 emissions in the 2017 inventory.
- As many as 30 million U.S. residents were estimated to be impacted by wood smoke each year in studies cited by DOE.
- A New York City model estimated 707 to 1,550 deaths from biomass emissions in 2017.
- EPA estimated $56 billion to $126 billion in annual health benefits from replacing all old U.S. wood stoves with cleaner hearth appliances.
- EPA-certified wood stoves were estimated to emit 70% less particle pollution than stoves manufactured before 1990.
- A Libby, Montana, changeout replaced more than 1,100 wood stoves and reduced wintertime particle pollution by 7 micrograms per cubic meter.
Contents
- Key Wood Heating Statistics
- Wood Heating Household Adoption and Primary-Use Scale
- Wood Heating Appliances and Household Roles
- Wood Fuel Consumption and Heating-Energy Trends
- Wood Heating Emissions and Air Quality
- Wood Smoke Health Exposure and Economic Measurements
- Wood-Stove Upgrades, Efficiency and Community Outcomes
Wood Heating Household Adoption and Primary-Use Scale
The broadest recent DOE estimate says about 10% of U.S. households burn wood for heat, or approximately 13 million households. The same 2024 DOE RFI gives about 2% as the share using wood as their primary heat source; the broader 10% measure includes households that burn wood without making it their main fuel. Department of Energy Releases Request for Information to Achieve More Efficient and Cleaner Residential Wood Heaters
| Measure | Figure | Period and scope |
|---|---|---|
| Any wood burning for heat | About 10% | 2024 estimate, U.S. households |
| Primary wood heat | About 2% | 2024 DOE RFI estimate, U.S. households |
| Households represented by the broader estimate | Approximately 13 million | 2024 DOE estimate, United States |
| Primary heating in Census measure | 1.9% | 2018, U.S. homes |
The DOE workshop report gives a different but related set of estimates: 12.5 million U.S. homes use wood or pellets for space heating, about 2.7 million use wood heaters as primary heaters and about 9 million use them as secondary heaters. Wood and pellets are combined in the 12.5-million figure, and the secondary-heater estimate does not necessarily equal the difference between every cited total. Wood Heater Design Challenge Workshop Report
Wood use is more concentrated in some rural areas than the national average. The 2018 Census comparison cited by DOE found that more than 16% of homes used wood as primary heat in some rural U.S. counties, a local high-use comparison rather than a national rate. Wood Heater Design Challenge Workshop Report
A separate 2023 DOE deck reports 2.4 million U.S. homes using wood as their primary heat source. That estimate differs from other DOE and EIA-linked figures, so it should remain identified as the deck’s estimate rather than treated as a census count. BETO Wood Heat Financial Assistance
Direct renewable-energy comparisons measure a different denominator. In 2020, wood and waste supplied 54% of direct renewable energy consumed by U.S. residential and commercial sectors, excluding liquid biomass fuels, while solar supplied 38%; these are source-mix shares, not shares of all heating energy.
The same DOE deck cites a Vermont plan target of 35% of thermal energy from wood, which is a policy target rather than an achieved statewide observation. BETO Wood Heat Financial Assistance
Wood Heating Appliances and Household Roles
Appliance stock helps describe the installed base, but an appliance count is not an annual active-use count. EPA’s facts page, using a 2018 EIA estimate, lists approximately 12 million fireplaces, 897,000 hydronic heaters and 12.5 million wood stoves in use nationwide; EPA also cites more than 2 million inefficient, uncertified wood stoves in a 2017 inventory. Burn Wise: Facts & Figures + Health and Safety Tips
The main appliance categories in the EPA-cited 2018 estimate are:
- Approximately 12 million fireplaces were in use nationwide.
- Approximately 897,000 hydronic heaters were in use nationwide.
- Approximately 12.5 million wood stoves were in use nationwide.
- More than 2 million wood stoves were inefficient, uncertified devices in the cited 2017 inventory.
The household role of wood heating also has an income dimension. EPA cites 2015 survey data showing that 40% of homes heating with wood had annual household income of $40,000 or less; this is a survey measure from 2015, not a current income profile. Burn Wise: Facts & Figures + Health and Safety Tips
Historical data show how different appliance roles have been over time. A 1993 assessment counted 9.3 million wood stoves, 27 million fireplaces and about 0.6 million other residential wood appliances; about 7 million of those fireplaces were classified as seldom used. Strategies for Reducing Residential Wood Smoke
The 1976 assessment estimated 912,000 housing units using primary wood-fired heating devices, 5.122 million metric tons of wood burned annually for primary heating, 28 million fireplaces burning wood for auxiliary or aesthetic purposes and 7.6 million auxiliary wood stoves burning wood. The fireplaces were estimated to burn 2.7 million metric tons annually, while the auxiliary stoves were estimated to burn 8.8 million metric tons. Strategies for Reducing Residential Wood Smoke
That 1976 assessment also found regional concentration: Alabama, Georgia, North Carolina, South Carolina, Tennessee and Virginia contained about 39% of the nation’s primary wood-fired heating devices and accounted for 32% of wood burned for primary heating. These are historical estimates and should not be read as current regional shares. Strategies for Reducing Residential Wood Smoke
Wood Fuel Consumption and Heating-Energy Trends
Short-period fuel changes can reflect weather as much as adoption. EIA reported that U.S. residential wood consumption fell 15% in January–March 2020 compared with the same period in 2019, while heating degree days were 15% lower on average; EIA also reported a 4% fall in total U.S. residential energy consumption from 2019 to 2020. Despite more people staying at home, U.S. residential energy use fell 4% in 2020
| Measurement | Result | Scope |
|---|---|---|
| Residential wood consumption | 15% lower | January–March 2020 versus January–March 2019, U.S. residential sector |
| Residential energy consumption | 4% lower | 2019–2020, United States |
| Heating degree days | 15% lower | January–March 2020 versus January–March 2019, United States |
EIA’s 2020 RECS methodology uses conversion assumptions for household wood reporting: one cord contains 20,000,000 Btu of energy content, and one 40-pound bag of pellets contains 330,000 Btu. These are tabulation assumptions, not measured heat-delivery outputs. 2020 Residential Energy Consumption Survey (RECS) Consumption and Expenditures Tables
The RECS wood tables are dedicated special tabulations, and EIA notes that some wood amounts were imputed. Wood estimates were not included in total or average household energy-consumption estimates, so wood-fuel quantities should not be casually combined with those totals. 2020 Residential Energy Consumption Survey (RECS) Consumption and Expenditures Tables
Wood Heating Emissions and Air Quality
EPA’s 2017 inventory places residential wood combustion as the second-largest contributor to national wintertime PM2.5 emissions. EPA also says residential wood smoke emitted more PM2.5 than on-road and non-road vehicles combined, and five times more than petroleum refineries, cement manufacturers and pulp-and-paper plants combined; these are PM2.5 comparisons, not claims about every pollutant. Burn Wise: Facts & Figures + Health and Safety Tips
A DOE deck estimates wood heaters at about 6% of total annual U.S. PM2.5 emissions in the 2017 inventory. The deck also attributes more than 57% of residential-heating-sector air-pollution health-related social costs to wood heaters; social cost is modeled and is not a household bill. BETO Wood Heat Financial Assistance
Older EPA estimates provide additional pollutant-specific context. Residential wood combustion was attributed more than 420,000 tons of fine particles per year, 44% of total stationary and mobile polycyclic organic matter emissions and 62% of emissions from seven listed polycyclic aromatic hydrocarbons.
These are historical, report-era estimates. Strategies for Reducing Residential Wood Smoke
Local winter conditions can be much more concentrated than national annual shares. EPA’s examples attribute 25% of the wintertime pollution problem in Keene, New Hampshire, and over 50% of the wintertime particle-pollution problem in both Sacramento, California, and Tacoma, Washington, to wood smoke.
These are local case-study estimates, not national averages. Strategies for Reducing Residential Wood Smoke
Wood Smoke Health Exposure and Economic Measurements
DOE cites studies estimating that as many as 30 million U.S. residents are impacted by wood smoke each year. This is an exposure-related estimate, not a count of diagnosed illness. BETO Wood Heat Financial Assistance
A DOE-cited New York City model estimated 707 to 1,550 deaths from biomass emissions in 2017 and associated economic damages of $8.12 billion to $17.8 billion in 2022 U.S. dollars. Both figures are modeled attribution ranges, not death-certificate counts or observed household losses. BETO Wood Heat Financial Assistance
Counterfactual estimates put a large value on replacing older appliances. EPA estimates that replacing all old U.S. wood stoves with cleaner hearth appliances would yield $56 billion to $126 billion in health benefits per year; an older EPA strategy report estimated at least $35 billion annually for changing out all old U.S. wood stoves.
The estimates come from different EPA materials and should not be merged into one figure. Burn Wise: Facts & Figures + Health and Safety Tips Strategies for Reducing Residential Wood Smoke
Wood-Stove Upgrades, Efficiency and Community Outcomes
EPA says replacing an old inefficient wood stove or fireplace can provide up to 50% more energy efficiency. The actual improvement depends on the appliance, fuel, installation and operation, so the figure is an up-to estimate rather than a guaranteed household fuel saving. Burn Wise: Facts & Figures + Health and Safety Tips
EPA’s older comparisons report that certified wood stoves emitted 70% less particle pollution and were approximately 50% more energy efficient than stoves manufactured before 1990. These are comparative estimates, and field performance varies with fuel and operation. Strategies for Reducing Residential Wood Smoke
| Upgrade or program measure | Result | Period or location |
|---|---|---|
| Certified versus pre-1990 particle emissions | 70% lower | EPA comparison |
| Certified versus pre-1990 energy efficiency | Approximately 50% higher | EPA comparison |
| Libby stove changeout | More than 1,100 stoves replaced | Libby, Montana, case study |
| Libby wintertime particle reduction | 7 micrograms per cubic meter | Libby, Montana, case study |
| Broader changeouts | More than 7,500 stoves and fireplaces in 35 communities | EPA program summary |
| Broader fine-particle reduction | Approximately 200 tons per year | 35 U.S. communities |
| Broader estimated health benefits | Approximately $100 million per year | 35 U.S. communities |
The Libby, Montana, program replaced more than 1,100 wood stoves and reduced wintertime particle pollution by 7 micrograms per cubic meter. EPA’s broader summary reports more than 7,500 wood stoves and fireplaces changed out in 35 communities, with approximately 200 tons per year of fine-particle reductions and approximately $100 million per year in estimated health benefits. Strategies for Reducing Residential Wood Smoke