Total U.S.a 1 member 2 members 3 members 4 members

5 or more 

members

All homes 123.53 33.59 45.31 18.27 15.56 10.81

Air-conditioning equipment

Uses air-conditioning equipment 109.51 28.76 41.00 16.16 13.92 9.66

Does not use air-conditioning 

equipment 14.02 4.82 4.31 2.10 1.63 1.15

Apartment primarily air conditioned 

by equipment that serves multiple 

units in the building

Yes 6.85 3.09 2.06 0.79 0.49 0.42

No 20.27 8.92 6.52 2.10 1.62 1.12

Does not use air-conditioning 

equipment 5.05 2.46 1.24 0.66 0.48 0.22

Not asked (single family and mobile 

homes) 91.35 19.11 35.49 14.72 12.97 9.06

Main type of air-conditioning 

equipment used 

Central air-conditioning equipment 

(including central heat pump) 82.69 20.16 31.87 12.40 10.79 7.47

Ductless heat pump (mini-split) 1.76 0.47 0.64 0.27 0.22 0.16

Window or wall air conditioner 21.43 7.16 7.12 2.97 2.39 1.79

Portable air conditioner 2.68 0.74 0.95 0.39 0.42 0.17

Evaporative or swamp cooler 0.95 0.23 0.43 0.13 0.10 0.06

Does not use air-conditioning 

equipment 14.02 4.82 4.31 2.10 1.63 1.15

Main air-conditioning equipment age

Less than 2 years old 15.63 3.54 5.75 2.58 2.22 1.55

2 to 4 years old 21.76 5.27 8.20 3.35 3.04 1.89

5 to 9 years old 30.08 7.74 11.21 4.53 3.69 2.90

10 to 14 years old 20.49 5.59 7.49 2.94 2.62 1.85

15 to 19 years old 11.01 3.21 4.30 1.53 1.23 0.75

20 or more years old 10.55 3.42 4.05 1.24 1.11 0.72

Does not use air-conditioning 

equipment 14.02 4.82 4.31 2.10 1.63 1.15

Table HC7.4 Air conditioning in U.S. homes, by number of household members, 2020

Number of housing units (million)

Preliminary data release date: May 2022 

Final data release date: March 2023

Number of household members
Total U.S.a 1 member 2 members 3 members 4 members

5 or more 

members

All homes 123.53 33.59 45.31 18.27 15.56 10.81

Table HC7.4 Air conditioning in U.S. homes, by number of household members, 2020

Number of housing units (million)

Preliminary data release date: May 2022 

Final data release date: March 2023

Number of household members

Secondary type of air-conditioning 

equipment used

No other equipment used 100.18 27.05 37.64 14.58 12.43 8.48

Central air-conditioning equipment 

(including central heat pump) 0.86 0.09 0.40 0.12 0.13 0.11

Ductless heat pump (mini-split) 0.81 0.10 0.34 0.11 0.18 0.07

Window or wall air conditioner 4.62 0.91 1.58 0.82 0.74 0.57

Portable air conditioner 2.64 0.55 0.91 0.46 0.37 0.36

Evaporative or swamp cooler 0.41 Q 0.14 Q 0.06 Q

Does not use air-conditioning 

equipment 14.02 4.82 4.31 2.10 1.63 1.15

Number of ductless heat pump 

indoor units

One 1.21 0.25 0.50 0.19 0.18 0.09

Two 0.64 0.15 0.27 0.07 0.11 Q

Three 0.32 0.10 0.11 Q Q Q

Four or more 0.41 0.07 0.10 0.12 0.06 0.06

Does not use a ductless heat pump 106.94 28.19 40.03 15.78 13.52 9.42

Does not use air-conditioning 

equipment 14.02 4.82 4.31 2.10 1.63 1.15

Number of window or wall air 

conditioners used

One 11.90 4.94 3.74 1.32 1.21 0.70

Two 8.24 2.31 3.12 1.18 0.89 0.74

Three 3.72 0.61 1.26 0.82 0.55 0.48

Four or more 2.18 0.21 0.58 0.46 0.49 0.44

Does not use window or wall air 

conditioners 83.46 20.69 32.30 12.38 10.79 7.30

Does not use air-conditioning 

equipment 14.02 4.82 4.31 2.10 1.63 1.15

Number of portable air conditioners 

used

One 3.64 0.92 1.32 0.62 0.49 0.28

Two 1.28 0.34 0.43 0.19 0.20 0.13

Three 0.29 Q 0.09 Q 0.06 0.09

Four or more 0.10 Q Q Q Q Q

Does not use portable air 

conditioners 104.20 27.47 39.14 15.32 13.14 9.13

Does not use air-conditioning 

equipment 14.02 4.82 4.31 2.10 1.63 1.15
Total U.S.a 1 member 2 members 3 members 4 members

5 or more 

members

All homes 123.53 33.59 45.31 18.27 15.56 10.81

Table HC7.4 Air conditioning in U.S. homes, by number of household members, 2020

Number of housing units (million)

Preliminary data release date: May 2022 

Final data release date: March 2023

Number of household members

Has thermostat

Yes 109.45 28.85 40.83 16.30 13.97 9.49

Smart or internet-connected 

thermostat 12.78 1.53 4.65 2.51 2.65 1.44

Programmable thermostat 52.59 12.90 20.07 7.83 6.89 4.90

Non-programmable thermostat 44.08 14.42 16.12 5.97 4.43 3.15

No 12.73 4.16 4.18 1.80 1.43 1.16

Does not use heating or airconditioning equipment 1.35 0.58 0.30 0.16 0.15 0.16

Air-conditioning equipment control

Sets one temperature and leaves it 

there most of the time 45.94 12.10 17.14 6.79 5.61 4.30

Manually adjusts the temperature 25.20 7.18 9.69 3.63 2.80 1.89

Programmable or smart thermostat 

automatically adjusts the 

temperature 16.60 2.59 6.52 2.81 2.95 1.72

Turns equipment on or off as needed 18.71 6.19 6.58 2.43 2.08 1.43

Household does not have control over 

the air-conditioning equipment 3.04 0.71 1.06 0.49 0.46 0.32

Controls air-conditioning equipment 

some other way Q N Q N Q N

Does not use air-conditioning 

equipment 14.02 4.82 4.31 2.10 1.63 1.15

Summer indoor daytime 

temperature when someone is home

69 degrees or less 22.99 6.13 7.39 3.75 3.42 2.29

70 degrees 18.42 4.78 6.57 2.98 2.31 1.78

71 to 73 degrees 24.18 5.82 9.68 3.69 3.09 1.90

74 to 76 degrees 27.17 7.22 10.70 3.68 3.20 2.37

77 to 79 degrees 11.68 3.23 4.84 1.43 1.32 0.86

80 degrees or more 5.07 1.59 1.82 0.63 0.58 0.47

Does not use air-conditioning 

equipment 14.02 4.82 4.31 2.10 1.63 1.15
Total U.S.a 1 member 2 members 3 members 4 members

5 or more 

members

All homes 123.53 33.59 45.31 18.27 15.56 10.81

Table HC7.4 Air conditioning in U.S. homes, by number of household members, 2020

Number of housing units (million)

Preliminary data release date: May 2022 

Final data release date: March 2023

Number of household members

Summer indoor daytime 

temperature when no one is home

69 degrees or less 18.96 5.20 6.03 3.07 2.83 1.83

70 degrees 14.14 3.71 4.91 2.38 1.73 1.40

71 to 73 degrees 17.40 4.23 6.86 2.63 2.04 1.64

74 to 76 degrees 27.24 6.99 11.03 3.90 3.20 2.11

77 to 79 degrees 15.09 3.83 6.15 2.03 1.87 1.22

80 degrees or more 16.69 4.79 6.03 2.14 2.25 1.47

Does not use air-conditioning 

equipment 14.02 4.82 4.31 2.10 1.63 1.15

Summer indoor temperature at night

69 degrees or less 30.21 7.99 10.55 4.65 4.28 2.74

70 degrees 19.84 5.02 7.14 3.24 2.57 1.88

71 to 73 degrees 23.17 5.54 9.19 3.49 2.98 1.98

74 to 76 degrees 23.08 6.25 9.08 3.20 2.55 2.00

77 to 79 degrees 9.07 2.71 3.54 1.03 1.12 0.67

80 degrees or more 4.15 1.25 1.52 0.56 0.43 0.39

Does not use air-conditioning 

equipment 14.02 4.82 4.31 2.10 1.63 1.15

Air-conditioned basement

Yes 17.20 2.68 6.83 2.84 2.83 2.02

No 16.39 3.41 6.61 2.68 2.27 1.42

Not asked (air-conditioned homes 

with no basement) 42.73 8.78 16.95 6.87 6.05 4.09

Not asked (un-air-conditioned homes, 

apartments, and mobile homes) 47.21 18.72 14.92 5.88 4.42 3.28

Air-conditioned attic

Yes 2.22 0.34 0.68 0.43 0.48 0.31

No 49.94 9.33 20.19 8.15 7.50 4.78

Not asked (air-conditioned homes 

with no attic) 24.15 5.20 9.52 3.81 3.16 2.45

Not asked (un-air-conditioned homes, 

apartments, and mobile homes) 47.21 18.72 14.92 5.88 4.42 3.28
Total U.S.a 1 member 2 members 3 members 4 members

5 or more 

members

All homes 123.53 33.59 45.31 18.27 15.56 10.81

Table HC7.4 Air conditioning in U.S. homes, by number of household members, 2020

Number of housing units (million)

Preliminary data release date: May 2022 

Final data release date: March 2023

Number of household members

Air-conditioned attached garage

Yes 1.64 0.22 0.62 0.32 0.28 0.21

No 46.13 7.93 18.54 7.68 7.22 4.76

Not asked (air-conditioned homes 

with no attached garage) 28.54 6.72 11.23 4.40 3.64 2.56

Not asked (un-air-conditioned homes, 

apartments, and mobile homes) 47.21 18.72 14.92 5.88 4.42 3.28

Dehumidifier usage

Uses a dehumidifier 20.53 3.81 8.73 3.32 2.82 1.84

Uses only occasionally 2.95 0.42 1.02 0.65 0.61 0.25

Uses only during summer months 8.30 1.84 3.59 1.30 0.98 0.59

Uses about half of the year 3.14 0.50 1.42 0.41 0.47 0.34

Uses all or almost all of the year 6.11 1.05 2.69 0.95 0.75 0.66

Does not use a dehumidifier 103.00 29.77 36.58 14.95 12.73 8.97

Fan types used (more than one may 

apply)

Ceiling fans 89.45 21.80 34.06 13.61 11.72 8.26

Floor or window fans 54.39 13.85 19.50 8.57 7.30 5.17

Whole house fans 7.99 1.41 2.87 1.29 1.30 1.12

Attic fans 10.72 1.89 4.49 1.76 1.50 1.08

Number of ceiling fans used

0 34.08 11.79 11.25 4.66 3.84 2.55

1 19.94 6.86 6.96 2.56 2.02 1.53

2 19.42 5.76 7.11 2.63 2.27 1.66

3 16.02 3.79 6.65 2.42 1.89 1.28

4 or more 34.07 5.39 13.34 6.00 5.54 3.80

Most used ceiling fan usage

Uses a ceiling fan 89.45 21.80 34.06 13.61 11.72 8.26

Uses only occasionally 28.83 8.18 10.84 4.28 3.24 2.30

Uses only during summer months 22.13 5.47 8.63 2.90 3.15 1.98

Uses about half of the year 9.56 2.30 3.84 1.49 1.11 0.82

Uses all or almost all of the year 28.92 5.85 10.75 4.95 4.22 3.15

Does not use a ceiling fan 34.08 11.79 11.25 4.66 3.84 2.55
Total U.S.a 1 member 2 members 3 members 4 members

5 or more 

members

All homes 123.53 33.59 45.31 18.27 15.56 10.81

Table HC7.4 Air conditioning in U.S. homes, by number of household members, 2020

Number of housing units (million)

Preliminary data release date: May 2022 

Final data release date: March 2023

Number of household members

Number of floor or window fans 

used

0 69.14 19.74 25.81 9.70 8.26 5.64

1 24.53 8.27 9.27 3.08 2.43 1.49

2 18.85 4.11 7.09 3.41 2.54 1.71

3 7.04 1.05 2.10 1.42 1.42 1.04

4 or more 3.96 0.43 1.04 0.66 0.91 0.93

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.

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 1 member 2 members 3 members 4 members

5 or more 

members

All homes 0.00 1.25 1.15 1.87 2.08 3.13

Air-conditioning equipment

Uses air-conditioning equipment 0.35 1.37 1.14 1.90 2.11 3.43

Does not use air-conditioning 

equipment 2.70 5.01 5.26 6.58 8.68 9.08

Apartment primarily air conditioned 

by equipment that serves multiple 

units in the building

Yes 4.12 6.74 7.12 13.97 15.23 16.22

No 1.61 2.85 3.79 5.79 8.45 12.39

Does not use air-conditioning 

equipment 3.83 6.45 10.34 12.99 16.34 27.23

Not asked (single family and mobile 

homes) 0.00 1.81 1.22 1.99 2.35 3.03

Main type of air-conditioning 

equipment used 

Central air-conditioning equipment 

(including central heat pump) 0.55 1.84 1.42 2.35 2.43 3.49

Ductless heat pump (mini-split) 6.82 16.19 11.42 17.31 20.49 22.43

Window or wall air conditioner 2.04 3.83 3.44 4.35 5.76 8.98

Portable air conditioner 5.77 12.14 9.81 15.59 16.18 19.39

Evaporative or swamp cooler 8.39 15.27 12.77 20.02 22.99 36.51

Does not use air-conditioning 

equipment 2.70 5.01 5.26 6.58 8.68 9.08

Main air-conditioning equipment age

Less than 2 years old 2.46 5.60 3.64 6.30 6.88 8.22

2 to 4 years old 1.90 3.42 3.62 4.96 4.90 7.55

5 to 9 years old 1.31 2.70 2.58 4.44 4.82 5.13

10 to 14 years old 1.99 3.75 3.91 5.22 5.43 8.21

15 to 19 years old 2.71 4.99 4.32 7.69 8.23 9.30

20 or more years old 3.06 5.39 5.05 7.95 7.21 11.15

Does not use air-conditioning 

equipment 2.70 5.01 5.26 6.58 8.68 9.08

Preliminary data release date: May 2022 

Final data release date: March 2023

Relative standard errors (RSEs) for Table HC7.4 Air conditioning in U.S. homes, by number of household 

members, 2020

RSEs for number of housing units

Number of household members
Total U.S.a 1 member 2 members 3 members 4 members

5 or more 

members

All homes 0.00 1.25 1.15 1.87 2.08 3.13

Preliminary data release date: May 2022 

Final data release date: March 2023

Relative standard errors (RSEs) for Table HC7.4 Air conditioning in U.S. homes, by number of household 

members, 2020

RSEs for number of housing units

Number of household members

Secondary type of air-conditioning 

equipment used

No other equipment used 0.46 1.46 1.13 1.99 2.30 3.69

Central air-conditioning equipment 

(including central heat pump) 9.79 33.43 14.47 24.48 27.30 25.72

Ductless heat pump (mini-split) 10.68 29.55 14.31 22.62 21.73 35.80

Window or wall air conditioner 4.16 9.59 8.61 9.61 10.58 14.50

Portable air conditioner 5.52 13.19 8.96 14.06 14.13 19.79

Evaporative or swamp cooler 15.63 38.89 28.04 35.83 30.56 45.76

Does not use air-conditioning 

equipment 2.70 5.01 5.26 6.58 8.68 9.08

Number of ductless heat pump 

indoor units

One 9.21 25.51 13.98 19.14 21.82 31.66

Two 10.49 24.48 14.85 33.87 23.34 49.84

Three 16.59 30.55 24.23 54.10 36.09 43.28

Four or more 13.67 33.55 25.98 24.13 34.71 32.68

Does not use a ductless heat pump 0.36 1.32 1.11 1.97 2.20 3.38

Does not use air-conditioning 

equipment 2.70 5.01 5.26 6.58 8.68 9.08

Number of window or wall air 

conditioners used

One 2.62 4.51 4.62 8.74 9.98 11.32

Two 3.20 6.40 5.19 8.11 8.80 11.57

Three 4.52 14.79 7.97 9.44 11.74 14.32

Four or more 6.10 21.81 11.01 12.05 14.98 14.52

Does not use window or wall air 

conditioners 0.56 1.75 1.33 2.28 2.47 3.48

Does not use air-conditioning 

equipment 2.70 5.01 5.26 6.58 8.68 9.08

Number of portable air conditioners 

used

One 4.80 9.25 8.26 12.33 14.10 22.81

Two 9.08 19.40 14.32 21.25 20.79 26.40

Three 15.80 49.10 28.88 54.10 34.63 31.61

Four or more 23.68 100.18 44.17 74.30 45.56 43.88

Does not use portable air 

conditioners 0.41 1.55 1.17 1.89 2.14 3.56

Does not use air-conditioning 

equipment 2.70 5.01 5.26 6.58 8.68 9.08
Total U.S.a 1 member 2 members 3 members 4 members

5 or more 

members

All homes 0.00 1.25 1.15 1.87 2.08 3.13

Preliminary data release date: May 2022 

Final data release date: March 2023

Relative standard errors (RSEs) for Table HC7.4 Air conditioning in U.S. homes, by number of household 

members, 2020

RSEs for number of housing units

Number of household members

Has thermostat

Yes 0.33 1.36 1.16 1.88 2.07 3.47

Smart or internet-connected 

thermostat 2.22 7.25 4.07 5.87 4.62 7.57

Programmable thermostat 0.88 2.57 2.05 2.94 3.32 4.42

Non-programmable thermostat 1.29 1.91 2.32 3.31 3.75 6.56

No 2.69 5.06 4.71 7.51 8.55 10.10

Does not use heating or airconditioning equipment 8.55 16.79 15.99 27.98 30.99 28.87

Air-conditioning equipment control

Sets one temperature and leaves it 

there most of the time 1.19 2.70 2.04 3.69 3.76 5.28

Manually adjusts the temperature 1.60 2.93 2.79 4.81 5.27 6.41

Programmable or smart thermostat 

automatically adjusts the 

temperature 1.72 4.33 3.48 5.67 4.09 7.74

Turns equipment on or off as needed 2.00 3.51 3.73 5.60 6.79 7.67

Household does not have control over 

the air-conditioning equipment 5.17 11.59 9.53 15.38 15.44 18.03

Controls air-conditioning equipment 

some other way 59.14 0.00 71.74 0.00 100.40 0.00

Does not use air-conditioning 

equipment 2.70 5.01 5.26 6.58 8.68 9.08

Summer indoor daytime 

temperature when someone is home

69 degrees or less 1.59 3.56 3.09 4.26 4.59 7.05

70 degrees 2.04 4.03 3.58 5.56 5.95 6.66

71 to 73 degrees 1.50 3.72 2.57 3.90 4.86 5.62

74 to 76 degrees 1.47 3.41 2.24 4.69 4.93 6.61

77 to 79 degrees 2.57 5.59 4.44 8.71 8.68 9.79

80 degrees or more 3.78 7.42 6.94 13.32 10.59 15.82

Does not use air-conditioning 

equipment 2.70 5.01 5.26 6.58 8.68 9.08
Total U.S.a 1 member 2 members 3 members 4 members

5 or more 

members

All homes 0.00 1.25 1.15 1.87 2.08 3.13

Preliminary data release date: May 2022 

Final data release date: March 2023

Relative standard errors (RSEs) for Table HC7.4 Air conditioning in U.S. homes, by number of household 

members, 2020

RSEs for number of housing units

Number of household members

Summer indoor daytime 

temperature when no one is home

69 degrees or less 1.89 4.05 3.35 4.37 5.29 6.88

70 degrees 2.28 4.86 3.66 6.38 8.04 8.11

71 to 73 degrees 1.78 3.38 2.95 4.91 5.52 7.68

74 to 76 degrees 1.48 2.98 2.91 4.59 4.34 6.50

77 to 79 degrees 2.05 4.36 4.18 5.56 7.21 9.66

80 degrees or more 2.14 4.35 3.60 6.58 6.59 7.97

Does not use air-conditioning 

equipment 2.70 5.01 5.26 6.58 8.68 9.08

Summer indoor temperature at night

69 degrees or less 1.28 3.10 2.47 3.96 4.11 5.86

70 degrees 2.01 3.68 3.00 5.51 5.34 6.91

71 to 73 degrees 1.68 3.71 2.61 4.72 4.75 6.88

74 to 76 degrees 1.55 3.80 3.00 5.43 5.47 7.29

77 to 79 degrees 3.09 5.77 5.46 9.76 9.34 13.16

80 degrees or more 4.89 8.30 8.58 13.76 15.29 19.61

Does not use air-conditioning 

equipment 2.70 5.01 5.26 6.58 8.68 9.08

Air-conditioned basement

Yes 1.75 5.78 2.66 4.85 4.73 6.19

No 1.77 4.52 2.93 4.24 5.11 7.68

Not asked (air-conditioned homes 

with no basement) 0.60 2.80 1.68 3.61 3.86 4.85

Not asked (un-air-conditioned homes, 

apartments, and mobile homes) 0.55 1.87 2.21 3.85 5.12 5.90

Air-conditioned attic

Yes 5.62 14.96 9.34 15.42 12.11 15.83

No 0.75 2.83 1.62 2.58 3.32 3.99

Not asked (air-conditioned homes 

with no attic) 1.53 4.18 2.23 4.53 5.41 4.43

Not asked (un-air-conditioned homes, 

apartments, and mobile homes) 0.55 1.87 2.21 3.85 5.12 5.90
Total U.S.a 1 member 2 members 3 members 4 members

5 or more 

members

All homes 0.00 1.25 1.15 1.87 2.08 3.13

Preliminary data release date: May 2022 

Final data release date: March 2023

Relative standard errors (RSEs) for Table HC7.4 Air conditioning in U.S. homes, by number of household 

members, 2020

RSEs for number of housing units

Number of household members

Air-conditioned attached garage

Yes 6.88 17.15 11.49 14.70 14.28 25.04

No 0.67 2.80 1.73 2.97 3.33 3.66

Not asked (air-conditioned homes 

with no attached garage) 1.32 3.75 2.75 4.35 4.94 5.79

Not asked (un-air-conditioned homes, 

apartments, and mobile homes) 0.55 1.87 2.21 3.85 5.12 5.90

Dehumidifier usage

Uses a dehumidifier 1.57 4.67 2.91 4.56 6.19 6.82

Uses only occasionally 5.43 15.54 8.09 12.77 13.42 18.10

Uses only during summer months 2.63 7.17 4.74 7.14 9.30 11.79

Uses about half of the year 5.38 11.12 7.48 15.14 12.62 14.68

Uses all or almost all of the year 3.33 7.73 5.82 8.47 10.98 9.83

Does not use a dehumidifier 0.31 1.26 1.32 2.32 2.44 3.51

Fan types used (more than one may 

apply)

Ceiling fans 0.49 1.77 1.26 2.39 2.33 3.37

Floor or window fans 0.71 2.19 2.07 3.20 3.07 4.65

Whole house fans 2.75 8.69 5.26 8.26 6.92 8.22

Attic fans 2.19 5.93 3.88 7.34 5.61 7.81

Number of ceiling fans used

0 1.30 2.91 2.46 4.07 4.69 6.37

1 1.98 3.57 3.60 6.52 6.33 7.48

2 1.63 3.49 2.68 5.56 6.17 7.14

3 1.95 4.66 3.32 6.17 8.03 7.33

4 or more 1.16 3.45 2.38 3.34 3.05 4.58

Most used ceiling fan usage

Uses a ceiling fan 0.49 1.77 1.26 2.39 2.33 3.37

Uses only occasionally 1.31 3.08 2.87 3.86 5.12 5.90

Uses only during summer months 1.76 3.52 2.99 4.90 4.72 6.95

Uses about half of the year 3.28 6.26 4.57 7.54 7.62 11.08

Uses all or almost all of the year 1.36 3.35 2.59 3.88 4.14 5.48

Does not use a ceiling fan 1.30 2.91 2.46 4.07 4.69 6.37
Total U.S.a 1 member 2 members 3 members 4 members

5 or more 

members

All homes 0.00 1.25 1.15 1.87 2.08 3.13

Preliminary data release date: May 2022 

Final data release date: March 2023

Relative standard errors (RSEs) for Table HC7.4 Air conditioning in U.S. homes, by number of household 

members, 2020

RSEs for number of housing units

Number of household members

Number of floor or window fans 

used

0 0.56 1.71 1.45 2.72 2.95 3.90

1 1.82 3.23 3.32 5.53 6.05 8.37

2 2.24 4.59 3.80 5.20 6.39 7.74

3 3.51 10.75 7.13 7.41 7.62 9.49

4 or more 4.98 17.20 10.10 9.92 8.61 11.55

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.