Home comfort is shaped by heating, cooling, indoor air, building conditions and household routines. The available measures below are predominantly U.S.-specific and distinguish homes, households, occupied housing units, residential energy use and survey respondents.
Key Home Comfort Statistics
The following figures summarize the main measurable patterns:
- In 2020, space heating and air conditioning accounted for 52% of average U.S. household annual energy consumption.
- In 2020, about 40% of energy use in U.S. homes typically went to heating.
- In 2020, average U.S. household electricity consumption was about 10,500 kWh per year.
- In 2020, air conditioning represented 19% of U.S. residential site electricity consumption.
- In 2020, 89% of U.S. homes used air conditioning.
- From 1980 to 2020, central air-conditioning prevalence rose from 27% to 67% of U.S. homes.
- In 2020, natural gas was used in 58% of U.S. homes.
- In 2020, 26% of U.S. homes were all-electric.
- In 2020, more than 36 million U.S. households had someone working from home at least one day per week.
- In 2023, 13.2 million occupied U.S. housing units were uncomfortably hot for 24 hours or more.
- In 2023, 10.0 million occupied U.S. housing units were uncomfortably cold for at least 24 hours.
- In 2023, renters reported uncomfortably hot conditions at 13.6%, compared with 8.0% of homeowners.
- In 2023, 10.6% of urban U.S. households reported uncomfortably hot conditions, compared with 7.3% of rural households.
- In 2023, 15.7 million occupied U.S. housing units showed signs of mice or rats inside.
- In 2023, 11.8 million occupied U.S. housing units reported water leakage from outside.
- In 2023, 3.9 million occupied U.S. housing units reported mold.
- EPA guidance says indoor relative humidity should generally be kept between 30% and 50% in homes.
- From 2005 to 2009, severely inadequate U.S. occupied units ranged from 1.6% to 1.9% of occupied units.
Contents
- Household heating and cooling scale
- Energy use, fuels and appliance adoption
- Temperature comfort and cooling problems
- Housing quality and livability
- Indoor air quality and humidity
- Historical housing adequacy
Household Heating and Cooling Scale: Home Comfort Statistics
The U.S. Energy Information Administration’s 2020 Residential Energy Consumption Survey (RECS) places heating and cooling at the center of household energy demand. Together, space heating and air conditioning accounted for 52% of average annual household energy consumption among U.S. households, while water heating, lighting and refrigeration accounted for 25%.
Other devices, cooking and laundry uses made up the remaining 23%. That residual category is an energy-use grouping rather than a direct measure of comfort.
Source: EIA, Use of energy in homes
EIA also describes heating as typically using about 40% of home energy in the 2020 context. Residential energy use declined 4% from 2019 to 2020, a change affected by weather and pandemic-era behavior; the winter was warmer than usual.
Average U.S. household electricity consumption was about 10,500 kilowatt-hours in 2020. Within residential site electricity consumption, air conditioning represented 19%, while space heating and water heating each represented 12%.
Source: EIA, Electricity use in homes
| 2020 residential measure | Share or amount | Population and definition |
|---|---|---|
| Space heating plus air conditioning | 52% | Average annual household energy consumption, U.S. households |
| Heating, typical share | About 40% | Home energy use, EIA context |
| Household electricity use | About 10,500 kWh/year | Average U.S. household |
| Air conditioning | 19% | Residential site electricity consumption |
| Space heating | 12% | Residential site electricity consumption |
| Water heating | 12% | Residential site electricity consumption |
These measures are not interchangeable: the 52% figure covers household annual energy consumption, while the end-use percentages in the table describe residential site electricity consumption.
Home Comfort Data on Energy Use, Fuels and Appliance Adoption
Electricity purchases accounted for about 44% of residential-sector end-use energy consumption in 2020, and natural gas accounted for about 43%. Petroleum fuels represented about 8%, while renewable sources including geothermal, solar and wood represented about 5%.
Natural gas was used in 58% of U.S. homes for at least one household end use. Fuel oil was the main heating fuel in 5% of homes, illustrating why fuel measures should not be treated as mutually exclusive household categories.
Source: EIA, Use of energy in homes
Air-conditioning adoption was widespread by 2020, but the historical change is substantial. About 89% of U.S. homes used air conditioning in 2020, compared with 57% in 1980; central air-conditioning prevalence rose from 27% to 67% over the same period.
| Air-conditioning measure | 1980 | 2020 |
|---|---|---|
| Any air-conditioning use | 57% of homes | 89% of homes |
| Central air conditioning | 27% of homes | 67% of homes |
Source: EIA, Electricity use in homes
The 2020 state-level RECS data show different equipment and fuel patterns. Florida had 96% air-conditioning use, including 90% central air conditioning, while New York had about 88% air-conditioning use and 61% individual units such as window or wall units.
| 2020 state measure | Reported share | Geography |
|---|---|---|
| Air-conditioning use | 96%; 90% central | Florida households |
| Air-conditioning use; individual units | About 88%; 61% individual | New York homes |
| All-electric homes | 77% | Florida homes |
| All-electric homes | 72% | Hawaii homes |
| All-electric homes | 8% | California homes |
California also had three-quarters of households using natural gas for water heating. Fuel-oil deliveries were reported by 53% of households in Maine and Vermont, 43% in New Hampshire and 40% in Connecticut; these are delivery measures, not necessarily exclusive heating-fuel shares.
Appliance adoption also changed. Homes with two or more refrigerators rose from 30% in 2015 to 34% in 2020, while separate freezers were present in 33% of U.S. homes.
The most-used refrigerator cost about $87 per year to operate on average, compared with about $66 for a second refrigerator.
Idaho had two or more refrigerators in about 47% of homes. Separate freezers were present in 65% of South Dakota homes and 64% of North Dakota homes.
More than 36 million households, or 30%, had someone working from home at least one day per week in 2020. This is a context measure from the pandemic-era RECS, not a direct comfort outcome.
The 2020 RECS characteristics were collected in late 2020 and early 2021 during unusual pandemic-era home occupancy, so they should not be presented as current 2026 conditions.
Home Temperature Comfort and Cooling Problems in U.S. Homes
The 2023 American Housing Survey recorded respondent-reported comfort episodes rather than continuous indoor-temperature readings. During the preceding 12 months, 13.2 million occupied U.S. housing units were uncomfortably hot for 24 hours or more, and 10.0 million were uncomfortably cold for at least 24 hours.
Source: U.S. Census Bureau, 2023 AHS Infographic: Housing Quality
About 10% of U.S. households reported being uncomfortably hot for 24 hours or more in 2023. Renters reported this more often than homeowners, at 13.6% versus 8.0%; urban households reported 10.6%, compared with 7.3% of rural households.
| 2023 reported hot conditions | Share | Population |
|---|---|---|
| Uncomfortably hot for 24 hours or more | About 10% | U.S. households |
| Renters | 13.6% | U.S. renter households |
| Homeowners | 8.0% | U.S. homeowner households |
| Urban households | 10.6% | U.S. urban households |
| Rural households | 7.3% | U.S. rural households |
About 54 million households, or 40.5%, said their home’s exterior was not shaded by trees or other buildings. About 44 million households, or 33.0%, described nearby shade as minimal or not shady at all, based on shade within a half block.
Nearly 32.7% of respondents said homes without a cooling device did not stay cool very well or not well at all. This conditional question measures perceived cooling performance, not an instrumented temperature result.
Housing Quality Statistics Linked to Comfort and Livability
The 2023 AHS covered 133.2 million occupied U.S. housing units. Its housing-quality measures show that comfort depends on moisture control, openings, structural conditions and basic functioning, not only on heating and cooling equipment.
| Reported condition in 2023 | Occupied U.S. housing units |
|---|---|
| Mice or rats inside during prior 12 months | 15.7 million |
| Water leakage from outside | 11.8 million |
| Water leakage from inside | 11.2 million |
| Open cracks or holes inside | 7.2 million |
| Foundation crumbling or open cracks or holes | 4.9 million |
| Broken window | 4.1 million |
| Mold in prior 12 months | 3.9 million |
| Exposed wiring | 3.7 million |
| Broken plaster or peeling paint inside | 2.9 million |
| No working toilet at some point in prior three months | 2.3 million |
Source: U.S. Census Bureau, 2023 AHS Infographic: Housing Quality
The recall periods differ: most conditions use the prior 12 months, while the working-toilet measure uses the prior three months. The AHS figures are self-reported housing-condition measures; they do not quantify leak duration, severity or environmental mold concentration.
Indoor Air Quality, Humidity and Home Comfort Measurements
The Environmental Protection Agency says people spend an average of 90% of their time indoors in its indoor-air-quality educational context. That makes ventilation, humidity and pollutant control relevant parts of livability, although the 90% figure is an EPA estimate rather than a 2023 household-survey result.
Source: EPA, Factsheet: What is Indoor Air Quality?
EPA guidance recommends keeping indoor relative humidity between 30% and 50%, and advises keeping it below 60%; the 30%-50% interval is described as ideal. These are recommended control ranges, not measurements of how many U.S. homes fall within each range.
| Indoor humidity guidance | Meaning |
|---|---|
| 30%-50% relative humidity | EPA recommended range |
| Below 60% relative humidity | EPA advised upper threshold |
Source: EPA, Care for Your Air: A Guide to Indoor Air Quality
The guidance should therefore be read as a practical benchmark for home conditions, not as evidence of national humidity prevalence. The supplied EPA material also identifies home controls for asthma triggers, but no multiplier or national outcome estimate is provided here.
Historical Housing Adequacy and Persistent Home Comfort Problems
Historical American Housing Survey analysis provides context for severe housing inadequacy, but it should not be treated as a current prevalence estimate. Severely inadequate occupied units numbered 2,021,050 in 2005, 1,805,960 in 2007 and 1,863,660 in 2009.
| AHS year | Severely inadequate occupied units | Share of occupied units |
|---|---|---|
| 2005 | 2,021,050 | 1.9% |
| 2007 | 1,805,960 | 1.6% |
| 2009 | 1,863,660 | 1.7% |
Source: HUD User, Housing Adequacy and Quality As Measured by the AHS
Among severely inadequate units, shared plumbing facilities affected 51.2% in 2005, 57.2% in 2007 and 57.1% in 2009. Unacceptable cold periods caused by heat failures affected 31.7%, 25.6% and 29.2%, respectively.
| Condition among severely inadequate units | 2005 | 2007 | 2009 |
|---|---|---|---|
| Shared plumbing facilities | 51.2% | 57.2% | 57.1% |
| Unacceptable cold from heat failures | 31.7% | 25.6% | 29.2% |
| No hot and cold running water | 11.0% | 9.4% | 6.1% |
| No bathtub or shower | 7.9% | 10.0% | 6.0% |
These percentages are not mutually exclusive because one unit could have multiple qualifying problems. More than 90% of severely inadequate units had only one qualifying physical condition, with a three-year average of 91.5%; only one sample unit among approximately 40,000 surveyed had five severe physical problems in any of the three years.
The 2005-2009 AHS adequacy report is historical and supports trend context only. It should not be used as a substitute for a current 2023 or 2026 estimate.