Total U.S.a

Less 

than 1,000

1,000 

to 1,499

1,500 

to 1,999 

2,000 

to 2,499

2,500 

to 2,999

3,000 

or more

All homes 123.53 30.01 28.08 22.22 15.62 10.31 17.29

Air-conditioning equipment

Uses air-conditioning equipment 109.51 25.22 24.52 19.66 14.24 9.60 16.28

Does not use air-conditioning 

equipment 14.02 4.80 3.56 2.56 1.38 0.71 1.02

Apartment primarily air conditioned 

by equipment that serves multiple 

units in the building

Yes 6.85 4.15 2.18 0.38 Q Q Q

No 20.27 13.23 5.72 0.89 0.38 Q Q

Does not use air-conditioning 

equipment 5.05 3.43 1.37 0.19 Q Q Q

Not asked (single family and mobile 

homes) 91.35 9.20 18.80 20.75 15.14 10.26 17.21

Main type of air-conditioning 

equipment used 

Central air-conditioning equipment 

(including central heat pump) 82.69 14.29 18.10 15.42 11.96 8.34 14.59

Ductless heat pump (mini-split) 1.76 0.42 0.34 0.29 0.26 0.19 0.26

Window or wall air conditioner 21.43 9.35 5.18 3.17 1.63 0.91 1.18

Portable air conditioner 2.68 0.93 0.68 0.50 0.28 0.11 0.17

Evaporative or swamp cooler 0.95 0.23 0.21 0.27 0.10 0.05 0.08

Does not use air-conditioning 

equipment 14.02 4.80 3.56 2.56 1.38 0.71 1.02

Main air-conditioning equipment age

Less than 2 years old 15.63 3.39 3.57 2.92 2.29 1.27 2.20

2 to 4 years old 21.76 5.17 4.95 4.11 2.91 1.75 2.88

5 to 9 years old 30.08 7.05 6.70 5.36 3.82 2.73 4.42

10 to 14 years old 20.49 4.64 4.61 3.60 2.45 1.89 3.29

15 to 19 years old 11.01 2.42 2.32 2.08 1.36 0.97 1.86

20 or more years old 10.55 2.56 2.37 1.60 1.41 0.99 1.62

Does not use air-conditioning 

equipment 14.02 4.80 3.56 2.56 1.38 0.71 1.02

Secondary type of air-conditioning 

equipment used

No other equipment used 100.18 23.99 22.62 17.65 12.64 8.73 14.55

Central air-conditioning equipment 

(including central heat pump) 0.86 0.09 0.17 0.16 0.15 0.10 0.19

Ductless heat pump (mini-split) 0.81 Q 0.12 0.13 0.18 0.13 0.24

Window or wall air conditioner 4.62 0.52 0.99 1.09 0.81 0.43 0.78

Portable air conditioner 2.64 0.50 0.56 0.54 0.39 0.21 0.44

Evaporative or swamp cooler 0.41 0.10 Q 0.10 0.07 Q 0.07

Does not use air-conditioning 

equipment 14.02 4.80 3.56 2.56 1.38 0.71 1.02

Table HC7.9 Air conditioning in U.S. homes, by home size, 2020

Number of housing units (million)

Data release date: March 2023

Size of home in square feetb
Total U.S.a

Less 

than 1,000

1,000 

to 1,499

1,500 

to 1,999 

2,000 

to 2,499

2,500 

to 2,999

3,000 

or more

All homes 123.53 30.01 28.08 22.22 15.62 10.31 17.29

Table HC7.9 Air conditioning in U.S. homes, by home size, 2020

Number of housing units (million)

Data release date: March 2023

Size of home in square feetb

Number of ductless heat pump 

indoor units

One 1.21 0.21 0.21 0.18 0.19 0.14 0.28

Two 0.64 0.14 0.13 0.10 0.13 0.09 0.05

Three 0.32 Q Q Q 0.05 Q 0.08

Four or more 0.41 Q 0.06 0.10 0.08 0.05 0.09

Does not use a ductless heat pump 106.94 24.78 24.06 19.24 13.80 9.28 15.77

Does not use air-conditioning 

equipment 14.02 4.80 3.56 2.56 1.38 0.71 1.02

Number of window or wall air 

conditioners used

One 11.90 5.38 2.47 1.70 1.07 0.53 0.75

Two 8.24 3.25 2.03 1.33 0.70 0.39 0.54

Three 3.72 1.00 1.15 0.67 0.37 0.24 0.28

Four or more 2.18 0.25 0.52 0.55 0.30 0.17 0.39

Does not use window or wall air 

conditioners 83.46 15.35 18.35 15.40 11.80 8.27 14.31

Does not use air-conditioning 

equipment 14.02 4.80 3.56 2.56 1.38 0.71 1.02

Number of portable air conditioners 

used

One 3.64 1.06 0.80 0.68 0.50 0.22 0.39

Two 1.28 0.32 0.34 0.25 0.12 0.08 0.17

Three 0.29 Q 0.09 0.07 Q Q Q

Four or more 0.10 Q Q Q Q Q Q

Does not use portable air conditioners 104.20 23.79 23.27 18.62 13.57 9.28 15.67

Does not use air-conditioning 

equipment 14.02 4.80 3.56 2.56 1.38 0.71 1.02

Has thermostat

Yes 109.45 22.19 24.70 20.64 14.94 10.07 16.91

Smart or internet-connected 

thermostat 12.78 1.07 2.07 2.32 2.37 1.58 3.36

Programmable thermostat 52.59 8.95 11.50 10.18 7.74 5.23 8.99

Non-programmable thermostat 44.08 12.17 11.13 8.13 4.84 3.26 4.56

No 12.73 7.07 3.04 1.40 0.63 0.24 0.35

Does not use heating or airconditioning equipment 1.35 0.75 0.34 0.18 0.04 Q 0.03
Total U.S.a

Less 

than 1,000

1,000 

to 1,499

1,500 

to 1,999 

2,000 

to 2,499

2,500 

to 2,999

3,000 

or more

All homes 123.53 30.01 28.08 22.22 15.62 10.31 17.29

Table HC7.9 Air conditioning in U.S. homes, by home size, 2020

Number of housing units (million)

Data release date: March 2023

Size of home in square feetb

Air-conditioning equipment control

Sets one temperature and leaves it 

there most of the time 45.94 9.92 11.17 8.69 5.90 3.87 6.38

Manually adjusts the temperature 25.20 6.22 5.88 4.49 3.23 2.23 3.14

Programmable or smart thermostat 

automatically adjusts the 

temperature 16.60 1.21 2.42 3.00 2.97 2.35 4.66

Turns equipment on or off as needed 18.71 6.42 4.39 3.02 1.89 1.07 1.92

Household does not have control over 

the air-conditioning equipment 3.04 1.44 0.64 0.45 0.25 0.08 0.18

Controls air-conditioning equipment 

some other way Q Q Q Q N N N

Does not use air-conditioning 

equipment 14.02 4.80 3.56 2.56 1.38 0.71 1.02

Summer indoor daytime temperature 

when someone is home

69 degrees or less 22.99 7.18 5.35 3.75 2.65 1.57 2.50

70 degrees 18.42 4.41 4.46 3.21 2.35 1.45 2.54

71 to 73 degrees 24.18 4.48 5.18 4.22 3.39 2.40 4.51

74 to 76 degrees 27.17 5.46 6.04 5.08 3.49 2.63 4.47

77 to 79 degrees 11.68 2.04 2.58 2.49 1.66 1.19 1.71

80 degrees or more 5.07 1.65 0.90 0.91 0.70 0.36 0.55

Does not use air-conditioning 

equipment 14.02 4.80 3.56 2.56 1.38 0.71 1.02

Summer indoor daytime temperature 

when no one is home

69 degrees or less 18.96 5.75 4.37 3.39 2.13 1.33 1.98

70 degrees 14.14 3.53 3.42 2.43 1.77 1.16 1.83

71 to 73 degrees 17.40 3.46 3.69 3.05 2.47 1.58 3.14

74 to 76 degrees 27.24 5.23 6.13 4.88 3.54 2.72 4.75

77 to 79 degrees 15.09 2.74 3.30 2.93 1.99 1.62 2.52

80 degrees or more 16.69 4.52 3.60 2.98 2.33 1.20 2.05

Does not use air-conditioning 

equipment 14.02 4.80 3.56 2.56 1.38 0.71 1.02

Summer indoor temperature at night

69 degrees or less 30.21 8.57 6.81 5.29 3.70 2.19 3.65

70 degrees 19.84 4.86 4.51 3.45 2.49 1.67 2.86

71 to 73 degrees 23.17 4.28 5.32 4.00 3.15 2.13 4.29

74 to 76 degrees 23.08 4.63 5.16 4.27 3.07 2.30 3.65

77 to 79 degrees 9.07 1.72 1.92 1.94 1.23 0.96 1.30

80 degrees or more 4.15 1.16 0.80 0.72 0.60 0.36 0.51

Does not use air-conditioning 

equipment 14.02 4.80 3.56 2.56 1.38 0.71 1.02
Total U.S.a

Less 

than 1,000

1,000 

to 1,499

1,500 

to 1,999 

2,000 

to 2,499

2,500 

to 2,999

3,000 

or more

All homes 123.53 30.01 28.08 22.22 15.62 10.31 17.29

Table HC7.9 Air conditioning in U.S. homes, by home size, 2020

Number of housing units (million)

Data release date: March 2023

Size of home in square feetb

Air-conditioned basement

Yes 17.20 0.41 1.61 2.89 3.12 3.05 6.12

No 16.39 0.50 1.73 3.63 3.32 2.45 4.76

Not asked (air-conditioned homes 

with no basement) 42.73 4.75 10.98 10.76 6.94 3.98 5.32

Not asked (un-air-conditioned homes, 

apartments, and mobile homes) 47.21 24.36 13.76 4.95 2.23 0.83 1.09

Air-conditioned attic

Yes 2.22 0.10 0.27 0.41 0.34 0.28 0.83

No 49.94 3.50 8.57 10.53 8.81 6.61 11.93

Not asked (air-conditioned homes 

with no attic) 24.15 2.06 5.48 6.33 4.23 2.59 3.44

Not asked (un-air-conditioned homes, 

apartments, and mobile homes) 47.21 24.36 13.76 4.95 2.23 0.83 1.09

Air-conditioned attached garage

Yes 1.64 Q 0.15 0.24 0.36 0.31 0.53

No 46.13 2.24 6.67 9.80 8.17 6.97 12.27

Not asked (air-conditioned homes 

with no attached garage) 28.54 3.36 7.49 7.23 4.85 2.20 3.41

Not asked (un-air-conditioned homes, 

apartments, and mobile homes) 47.21 24.36 13.76 4.95 2.23 0.83 1.09

Dehumidifier usage

Uses a dehumidifier 20.53 1.64 2.76 3.80 3.67 3.12 5.53

Uses only occasionally 2.95 0.48 0.54 0.68 0.42 0.33 0.50

Uses only during summer months 8.30 0.52 1.00 1.52 1.59 1.25 2.42

Uses about half of the year 3.14 0.27 0.37 0.50 0.57 0.54 0.89

Uses all or almost all of the year 6.11 0.36 0.85 1.10 1.09 1.00 1.70

Does not use a dehumidifier 103.00 28.37 25.31 18.41 11.95 7.19 11.76

Fan types used (more than one may 

apply)

Ceiling fans 89.45 16.09 19.74 17.72 12.57 8.68 14.65

Floor or window fans 54.39 14.07 12.83 9.98 6.90 4.23 6.37

Whole house fans 7.99 0.64 1.39 1.80 1.34 1.00 1.81

Attic fans 10.72 0.58 1.42 2.17 2.05 1.58 2.92

Number of ceiling fans used

0 34.08 13.93 8.33 4.50 3.05 1.62 2.64

1 19.94 6.90 4.84 3.05 2.11 1.09 1.95

2 19.42 5.07 4.53 3.58 2.25 1.62 2.37

3 16.02 2.37 4.55 3.32 2.11 1.51 2.17

4 or more 34.07 1.75 5.84 7.77 6.10 4.46 8.16
Total U.S.a

Less 

than 1,000

1,000 

to 1,499

1,500 

to 1,999 

2,000 

to 2,499

2,500 

to 2,999

3,000 

or more

All homes 123.53 30.01 28.08 22.22 15.62 10.31 17.29

Table HC7.9 Air conditioning in U.S. homes, by home size, 2020

Number of housing units (million)

Data release date: March 2023

Size of home in square feetb

Most used ceiling fan usage

Uses a ceiling fan 89.45 16.09 19.74 17.72 12.57 8.68 14.65

Uses only occasionally 28.83 6.16 6.45 5.46 3.79 2.50 4.48

Uses only during summer months 22.13 3.70 4.53 4.32 3.33 2.37 3.90

Uses about half of the year 9.56 1.43 2.20 1.78 1.47 1.00 1.67

Uses all or almost all of the year 28.92 4.80 6.56 6.16 3.99 2.81 4.60

Does not use a ceiling fan 34.08 13.93 8.33 4.50 3.05 1.62 2.64

Number of floor or window fans used

0 69.14 15.95 15.25 12.24 8.72 6.08 10.92

1 24.53 7.54 5.86 4.13 2.77 1.67 2.57

2 18.85 4.80 4.60 3.47 2.42 1.49 2.08

3 7.04 1.25 1.59 1.40 1.09 0.65 1.07

4 or more 3.96 0.49 0.79 0.98 0.62 0.43 0.66

Data source: U.S. Energy Information Administration, Office of Energy Demand and Integrated Statistics, Form EIA-457A of the 2020 Residential Energy Consumption 

Survey

Notes: Because of rounding, data may not sum to totals. See RECS Terminology for the definitions of terms used in these tables.

a Total U.S. includes all primary occupied housing units in the 50 states and the District of Columbia. Vacant housing units, seasonal units, second homes, military 

houses, and group quarters are excluded.

b Total square footage includes all basements, finished or conditioned (heated or cooled) areas of attics, and conditioned garage space that is attached to the home. 

Unconditioned and unfinished areas in attics and attached garages are excluded. The square footage of the home is based on respondent reports. Previous RECS 

cycles calculated square footage based on interviewer measurements. For households that did not report an exact square footage estimate, the square footage of 

the home was imputed based on a reported square footage range and/or characteristics of the home. See 2020 RECS Square Footage Methodology for full details 

about data collection and processing.

Q = Data withheld because either the relative standard error (RSE) was greater than 50% or fewer than 10 households were in the reporting sample.

N = No households in reporting sample. 
Total U.S.a

Less 

than 1,000

1,000 

to 1,499

1,500 

to 1,999 

2,000 

to 2,499

2,500 

to 2,999

3,000 

or more

All homes 0.00 1.20 1.54 1.59 2.32 2.55 1.93

Air-conditioning equipment

Uses air-conditioning equipment 0.35 1.46 1.67 1.79 2.31 2.54 2.10

Does not use air-conditioning 

equipment 2.70 3.89 5.16 5.62 7.61 11.22 8.20

Apartment primarily air conditioned 

by equipment that serves multiple 

units in the building

Yes 4.12 6.29 6.60 15.43 39.00 90.05 51.21

No 1.61 2.36 4.20 12.44 17.88 91.20 71.85

Does not use air-conditioning 

equipment 3.83 4.59 8.99 26.46 52.46 75.88 100.13

Not asked (single family and mobile 

homes) 0.00 2.61 1.74 1.60 2.26 2.55 1.90

Main type of air-conditioning 

equipment used 

Central air-conditioning equipment 

(including central heat pump) 0.55 2.55 2.13 2.08 2.53 2.90 2.20

Ductless heat pump (mini-split) 6.82 14.99 15.60 15.69 12.16 18.68 14.46

Window or wall air conditioner 2.04 3.21 3.70 4.94 7.90 8.69 7.98

Portable air conditioner 5.77 9.54 10.47 12.96 17.49 27.02 18.88

Evaporative or swamp cooler 8.39 18.71 21.04 15.18 29.78 26.80 30.24

Does not use air-conditioning 

equipment 2.70 3.89 5.16 5.62 7.61 11.22 8.20

Main air-conditioning equipment age

Less than 2 years old 2.46 5.50 5.00 4.97 4.79 7.54 6.62

2 to 4 years old 1.90 3.80 3.96 3.61 4.26 6.89 5.12

5 to 9 years old 1.31 3.60 3.80 4.14 4.18 5.12 3.91

10 to 14 years old 1.99 5.05 4.74 4.79 5.29 5.49 4.90

15 to 19 years old 2.71 6.81 5.98 5.99 6.75 9.05 6.11

20 or more years old 3.06 6.52 6.83 7.41 8.09 9.60 7.43

Does not use air-conditioning 

equipment 2.70 3.89 5.16 5.62 7.61 11.22 8.20

Secondary type of air-conditioning 

equipment used

No other equipment used 0.46 1.38 1.78 2.02 2.48 2.44 2.19

Central air-conditioning equipment 

(including central heat pump) 9.79 29.62 21.73 22.81 22.93 29.92 16.27

Ductless heat pump (mini-split) 10.68 100.25 31.22 34.42 19.82 19.84 16.13

Window or wall air conditioner 4.16 13.65 10.01 9.83 8.92 13.84 9.72

Portable air conditioner 5.52 17.89 12.59 13.95 16.14 19.98 11.76

Evaporative or swamp cooler 15.63 33.69 43.71 35.00 34.65 70.52 29.98

Does not use air-conditioning 

equipment 2.70 3.89 5.16 5.62 7.61 11.22 8.20

Data release date: March 2023

Relative standard errors (RSEs) for Table HC7.9 Air conditioning in U.S. homes, by home size, 2020

RSEs for number of housing units

Size of home in square feetb
Total U.S.a

Less 

than 1,000

1,000 

to 1,499

1,500 

to 1,999 

2,000 

to 2,499

2,500 

to 2,999

3,000 

or more

All homes 0.00 1.20 1.54 1.59 2.32 2.55 1.93

Data release date: March 2023

Relative standard errors (RSEs) for Table HC7.9 Air conditioning in U.S. homes, by home size, 2020

RSEs for number of housing units

Size of home in square feetb

Number of ductless heat pump 

indoor units

One 9.21 25.51 25.77 23.97 16.32 20.40 15.61

Two 10.49 25.23 26.52 23.52 22.00 21.51 28.94

Three 16.59 45.68 41.23 38.88 31.04 47.58 32.50

Four or more 13.67 55.08 32.35 31.06 29.14 36.89 26.11

Does not use a ductless heat pump 0.36 1.49 1.73 1.84 2.38 2.47 2.07

Does not use air-conditioning 

equipment 2.70 3.89 5.16 5.62 7.61 11.22 8.20

Number of window or wall air 

conditioners used

One 2.62 4.87 5.53 7.15 7.52 10.59 9.65

Two 3.20 5.73 5.78 6.04 10.93 11.72 11.80

Three 4.52 9.48 7.98 11.20 15.26 17.06 12.99

Four or more 6.10 20.65 11.55 14.28 15.62 19.11 12.67

Does not use window or wall air 

conditioners 0.56 2.35 2.05 2.09 2.66 2.72 2.21

Does not use air-conditioning 

equipment 2.70 3.89 5.16 5.62 7.61 11.22 8.20

Number of portable air conditioners 

used

One 4.80 9.93 10.39 12.37 15.82 19.76 12.24

Two 9.08 17.56 17.43 18.54 27.02 33.93 20.39

Three 15.80 48.31 32.87 29.19 44.59 59.02 40.68

Four or more 23.68 70.66 56.12 44.43 54.93 73.86 61.04

Does not use portable air conditioners 0.41 1.44 1.79 1.94 2.36 2.53 2.10

Does not use air-conditioning 

equipment 2.70 3.89 5.16 5.62 7.61 11.22 8.20

Has thermostat

Yes 0.33 1.57 1.64 1.67 2.37 2.55 1.89

Smart or internet-connected 

thermostat 2.22 9.63 7.83 5.40 6.63 6.05 4.70

Programmable thermostat 0.88 2.95 2.53 2.37 3.63 3.27 2.20

Non-programmable thermostat 1.29 2.56 2.53 3.02 4.19 5.18 4.00

No 2.69 3.85 5.02 7.29 12.85 19.18 16.07

Does not use heating or airconditioning equipment 8.55 11.28 19.17 18.67 45.10 49.79 36.54
Total U.S.a

Less 

than 1,000

1,000 

to 1,499

1,500 

to 1,999 

2,000 

to 2,499

2,500 

to 2,999

3,000 

or more

All homes 0.00 1.20 1.54 1.59 2.32 2.55 1.93

Data release date: March 2023

Relative standard errors (RSEs) for Table HC7.9 Air conditioning in U.S. homes, by home size, 2020

RSEs for number of housing units

Size of home in square feetb

Air-conditioning equipment control

Sets one temperature and leaves it 

there most of the time 1.19 2.86 3.04 3.15 3.60 4.67 2.92

Manually adjusts the temperature 1.60 3.63 3.80 4.37 5.25 5.40 4.71

Programmable or smart thermostat 

automatically adjusts the 

temperature 1.72 8.14 7.23 5.16 5.97 5.00 3.82

Turns equipment on or off as needed 2.00 3.99 4.97 5.26 6.74 8.65 6.60

Household does not have control over 

the air-conditioning equipment 5.17 8.36 12.55 14.11 19.07 27.16 22.21

Controls air-conditioning equipment 

some other way 59.14 100.75 100.40 100.18 0.00 0.00 0.00

Does not use air-conditioning 

equipment 2.70 3.89 5.16 5.62 7.61 11.22 8.20

Summer indoor daytime temperature 

when someone is home

69 degrees or less 1.59 2.78 3.42 4.79 5.39 6.75 4.92

70 degrees 2.04 4.36 4.47 4.74 6.01 7.17 5.71

71 to 73 degrees 1.50 4.79 4.26 5.09 3.95 6.55 3.82

74 to 76 degrees 1.47 4.41 3.94 4.10 4.59 5.45 4.14

77 to 79 degrees 2.57 8.47 5.99 5.67 5.24 7.55 6.73

80 degrees or more 3.78 6.67 9.42 8.72 10.87 15.77 11.98

Does not use air-conditioning 

equipment 2.70 3.89 5.16 5.62 7.61 11.22 8.20

Summer indoor daytime temperature 

when no one is home

69 degrees or less 1.89 2.80 4.45 4.87 6.04 7.97 6.28

70 degrees 2.28 5.50 5.61 5.19 5.79 8.19 6.31

71 to 73 degrees 1.78 4.73 4.08 5.65 5.76 7.54 4.71

74 to 76 degrees 1.48 3.54 4.17 4.12 4.25 6.12 3.47

77 to 79 degrees 2.05 6.01 5.32 5.34 6.62 7.08 6.34

80 degrees or more 2.14 4.63 5.54 5.49 5.85 8.40 6.16

Does not use air-conditioning 

equipment 2.70 3.89 5.16 5.62 7.61 11.22 8.20

Summer indoor temperature at night

69 degrees or less 1.28 2.64 3.20 3.92 4.17 5.52 4.12

70 degrees 2.01 4.70 4.41 4.97 6.00 7.18 6.00

71 to 73 degrees 1.68 4.82 4.30 5.69 3.68 6.16 3.78

74 to 76 degrees 1.55 4.81 4.39 4.70 4.30 5.27 4.19

77 to 79 degrees 3.09 8.68 7.43 6.66 6.74 8.53 7.75

80 degrees or more 4.89 9.01 10.98 11.10 12.75 18.09 11.50

Does not use air-conditioning 

equipment 2.70 3.89 5.16 5.62 7.61 11.22 8.20
Total U.S.a

Less 

than 1,000

1,000 

to 1,499

1,500 

to 1,999 

2,000 

to 2,499

2,500 

to 2,999

3,000 

or more

All homes 0.00 1.20 1.54 1.59 2.32 2.55 1.93

Data release date: March 2023

Relative standard errors (RSEs) for Table HC7.9 Air conditioning in U.S. homes, by home size, 2020

RSEs for number of housing units

Size of home in square feetb

Air-conditioned basement

Yes 1.75 15.06 6.75 4.44 5.35 4.52 3.10

No 1.77 13.62 6.44 4.54 4.65 5.12 3.44

Not asked (air-conditioned homes 

with no basement) 0.60 3.77 2.73 2.25 3.00 3.95 3.80

Not asked (un-air-conditioned homes, 

apartments, and mobile homes) 0.55 1.20 2.25 3.57 5.97 10.93 8.33

Air-conditioned attic

Yes 5.62 29.87 18.60 13.87 14.82 15.70 10.47

No 0.75 4.60 3.25 2.57 2.80 2.76 2.52

Not asked (air-conditioned homes 

with no attic) 1.53 5.32 4.02 2.93 4.15 5.09 4.60

Not asked (un-air-conditioned homes, 

apartments, and mobile homes) 0.55 1.20 2.25 3.57 5.97 10.93 8.33

Air-conditioned attached garage

Yes 6.88 39.09 20.85 18.02 13.22 17.43 11.66

No 0.67 6.32 3.65 2.87 2.93 3.16 2.13

Not asked (air-conditioned homes 

with no attached garage) 1.32 4.33 3.16 3.02 3.87 5.93 5.24

Not asked (un-air-conditioned homes, 

apartments, and mobile homes) 0.55 1.20 2.25 3.57 5.97 10.93 8.33

Dehumidifier usage

Uses a dehumidifier 1.57 8.81 5.32 4.16 4.10 4.31 3.44

Uses only occasionally 5.43 15.37 12.22 11.51 12.70 16.35 11.06

Uses only during summer months 2.63 15.77 9.26 6.84 6.71 7.09 5.81

Uses about half of the year 5.38 20.72 15.96 12.61 10.78 11.87 8.56

Uses all or almost all of the year 3.33 20.75 9.16 9.50 7.21 8.99 5.51

Does not use a dehumidifier 0.31 1.29 1.54 1.71 2.62 3.23 2.69

Fan types used (more than one may 

apply)

Ceiling fans 0.49 2.25 2.06 1.92 2.52 2.86 2.10

Floor or window fans 0.71 2.42 2.44 2.93 3.35 4.35 3.22

Whole house fans 2.75 11.34 8.26 5.92 6.99 9.33 7.10

Attic fans 2.19 11.71 6.63 4.69 6.56 7.00 4.02

Number of ceiling fans used

0 1.30 2.24 3.17 3.85 5.09 6.69 5.85

1 1.98 4.34 4.27 5.75 5.65 9.91 6.63

2 1.63 4.40 4.60 4.14 5.70 6.27 4.28

3 1.95 5.80 3.48 4.42 5.50 7.58 6.16

4 or more 1.16 7.28 3.39 3.59 3.33 4.09 2.64
Total U.S.a

Less 

than 1,000

1,000 

to 1,499

1,500 

to 1,999 

2,000 

to 2,499

2,500 

to 2,999

3,000 

or more

All homes 0.00 1.20 1.54 1.59 2.32 2.55 1.93

Data release date: March 2023

Relative standard errors (RSEs) for Table HC7.9 Air conditioning in U.S. homes, by home size, 2020

RSEs for number of housing units

Size of home in square feetb

Most used ceiling fan usage

Uses a ceiling fan 0.49 2.25 2.06 1.92 2.52 2.86 2.10

Uses only occasionally 1.31 3.95 4.02 3.85 4.16 5.93 3.76

Uses only during summer months 1.76 5.24 4.09 3.97 4.97 5.33 4.36

Uses about half of the year 3.28 8.62 5.78 5.53 7.25 8.60 6.05

Uses all or almost all of the year 1.36 4.32 3.13 3.81 3.72 4.74 3.58

Does not use a ceiling fan 1.30 2.24 3.17 3.85 5.09 6.69 5.85

Number of floor or window fans used

0 0.56 1.93 2.35 2.38 2.95 3.24 2.10

1 1.82 3.54 4.27 4.65 5.28 7.53 4.59

2 2.24 4.61 4.40 4.38 6.06 7.85 5.45

3 3.51 9.74 7.55 7.15 7.56 10.66 8.45

4 or more 4.98 14.25 11.58 9.06 11.77 12.83 10.16

Data source: U.S. Energy Information Administration, Office of Energy Demand and Integrated Statistics, Form EIA-457A of the 2020 Residential Energy Consumption 

Survey

Notes: See RECS Terminology for the definitions of terms used in these tables.

a Total U.S. includes all primary occupied housing units in the 50 states and the District of Columbia. Vacant housing units, seasonal units, second homes, military 

houses, and group quarters are excluded.

b Total square footage includes all basements, finished or conditioned (heated or cooled) areas of attics, and conditioned garage space that is attached to the home. 

Unconditioned and unfinished areas in attics and attached garages are excluded. The square footage of the home is based on respondent reports. Previous RECS 

cycles calculated square footage based on interviewer measurements. For households that did not report an exact square footage estimate, the square footage of 

the home was imputed based on a reported square footage range and/or characteristics of the home. See 2020 RECS Square Footage Methodology for full details 

about data collection and processing.