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Residential Energy Consumption Survey (RECS)

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Table HC7.8 Air conditioning in homes in the South and West regions, 20151

Release date: February 2017
Revised date: May 2018

Number of housing units (million)
South Census Region West Census Region
East South Central West South Central Mountain
  Total U.S.2 Total South South Atlantic Total West Total Mountain Mountain North Mountain South Pacific
All homes 118.2 44.4 23.5 7.2 13.8 26.4 8.5 4.2 4.3 17.9
Air-conditioning equipment                    
Use air-conditioning equipment 102.8 42.2 22.3 6.7 13.1 18.4 6.6 3.0 3.6 11.8
Do not use air-conditioning equipment 15.4 2.3 1.2 0.5 0.6 7.9 1.9 1.2 0.7 6.0
Type of air-conditioning equipment used (more than one may apply)                    
Use central air-conditioning equipment 76.1 35.9 19.2 5.6 11.2 14.2 5.7 2.4 3.3 8.6
Without a heat pump 55.4 22.4 10.2 2.9 9.3 10.7 4.6 2.2 2.3 6.1
With a heat pump 20.7 13.5 9.0 2.7 1.8 3.6 1.1 0.2 1.0 2.4
Use individual air-conditioning units 32.1 8.9 4.5 1.8 2.6 4.9 1.1 0.7 0.4 3.8
With 1 unit 15.9 4.0 2.1 0.9 1.0 3.2 0.8 0.6 0.2 2.4
With 2 units 9.6 2.4 1.3 0.5 0.6 1.3 0.3 Q Q 1.0
With 3 or more units 6.6 2.4 1.0 0.4 1.0 0.5 Q Q Q 0.4
Do not use air-conditioning equipment 15.4 2.3 1.2 0.5 0.6 7.9 1.9 1.2 0.7 6.0
Central air-conditioning equipment age                    
Less than 2 years old 8.3 4.1 2.2 0.6 1.2 1.6 0.6 0.3 0.3 1.0
2 to 4 years old 11.7 5.9 3.2 0.9 1.9 2.5 1.1 0.4 0.7 1.4
5 to 9 years old 22.4 11.1 5.6 1.9 3.6 3.8 1.6 0.7 1.0 2.2
10 to 14 years old 17.2 7.9 4.2 1.2 2.5 3.2 1.3 0.6 0.7 1.9
15 to 19 years old 9.2 3.9 2.2 0.7 1.0 1.8 0.7 0.2 0.5 1.1
20 or more years old 7.3 3.0 1.7 0.4 1.0 1.3 0.3 0.2 0.2 1.0
Do not use central air-conditioning equipment 42.1 8.5 4.3 1.6 2.6 12.1 2.8 1.9 1.0 9.3
Have thermostat for central air-conditioning equipment                    
Yes 74.7 35.5 19.0 5.5 11.0 13.7 5.4 2.3 3.1 8.3
Programmable thermostat 47.9 20.7 11.1 3.2 6.4 10.7 3.8 1.9 1.9 6.9
Non-programmable thermostat 26.8 14.8 7.9 2.3 4.6 3.0 1.6 0.4 1.2 1.4
No 1.4 0.4 Q Q Q 0.6 0.3 Q 0.2 0.3
Do not use central air-conditioning equipment 42.1 8.5 4.3 1.6 2.6 12.1 2.8 1.9 1.0 9.3
Central air-conditioning equipment control                    
Set one temperature and leave it there most of the time 34.0 17.6 9.5 3.4 4.7 4.8 2.0 0.7 1.3 2.8
Manually adjust the temperature at night or when no one is at home 19.6 10.4 5.2 1.5 3.7 3.3 1.5 0.8 0.8 1.7
Program the thermostat to automatically adjust the temperature during the day and night at certain times 13.7 5.2 3.0 0.4 1.9 2.9 1.3 0.7 0.6 1.6
Turn equipment on or off as needed 8.8 2.6 1.5 0.2 0.9 3.3 0.8 0.3 0.5 2.4
Household does not have control over the equipment Q Q Q N N N N N N N
Do not use central air-conditioning equipment 42.1 8.5 4.3 1.6 2.6 12.1 2.8 1.9 1.0 9.3
Most-used individual air-conditioning unit age                    
Less than 2 years old 6.4 2.2 1.2 0.4 0.6 1.1 Q Q Q 1.0
2 to 4 years old 10.0 3.3 1.6 0.6 1.1 1.4 0.4 0.2 Q 1.0
5 to 9 years old 9.8 2.3 1.1 0.6 0.6 1.2 0.3 0.2 Q 0.9
10 to 14 years old 3.7 0.7 0.3 Q Q 0.7 Q Q Q 0.6
15 to 19 years old 1.3 0.3 Q Q Q 0.3 Q Q Q Q
20 or more years old 1.1 Q Q Q Q Q Q Q N Q
Do not use individual air-conditioning units 86.1 35.5 19.0 5.4 11.1 21.5 7.4 3.5 3.8 14.1
Most-used individual air-conditioning unit control                    
Set one temperature and leave it there most of the time 9.8 3.3 1.6 0.7 1.0 1.1 0.2 Q Q 0.9
Manually adjust the temperature at night or when no one is at home 5.8 1.4 0.6 0.3 0.6 1.0 0.3 0.2 Q 0.7
Program the thermostat to automatically adjust the temperature during the day and night at certain times 1.5 0.6 0.3 Q Q Q Q Q N Q
Turn equipment on or off as needed 14.8 3.6 2.0 0.7 0.9 2.5 0.6 0.3 0.3 1.9
Some other way Q N N N N Q N N N Q
Do not use individual air-conditioning units 86.1 35.5 19.0 5.4 11.1 21.5 7.4 3.5 3.8 14.1
Summer indoor daytime temperature when someone is home                    
69 degrees or less 19.9 6.7 3.6 1.5 1.5 3.0 1.0 0.7 0.3 2.0
70 degrees 17.4 7.4 3.6 1.8 2.0 2.6 0.9 0.5 0.4 1.7
71 to 73 degrees 20.5 8.7 4.6 1.3 2.8 2.7 1.0 0.6 0.4 1.8
74 to 76 degrees 26.3 11.3 6.3 1.2 3.8 4.6 1.7 0.8 0.9 2.9
77 to 79 degrees 13.0 6.4 3.4 0.7 2.3 3.2 1.2 0.2 1.0 1.9
80 degrees or more 5.7 1.7 0.8 0.2 0.7 2.3 0.9 0.3 0.6 1.5
Do not use air-conditioning equipment 15.4 2.3 1.2 0.5 0.6 7.9 1.9 1.2 0.7 6.0
Summer indoor daytime temperature when no one is home                    
69 degrees or less 14.0 4.6 2.5 1.2 0.9 2.3 0.7 0.5 0.2 1.6
70 degrees 13.0 6.0 2.8 1.4 1.8 1.5 0.7 0.5 0.3 0.8
71 to 73 degrees 14.5 6.1 3.7 1.1 1.4 1.7 0.6 0.4 0.2 1.1
74 to 76 degrees 25.5 10.3 5.1 1.5 3.7 3.7 1.4 0.7 0.7 2.2
77 to 79 degrees 15.9 8.2 4.7 0.8 2.7 2.7 1.2 0.3 0.9 1.5
80 degrees or more 19.9 7.1 3.6 0.8 2.7 6.6 2.1 0.7 1.4 4.5
Do not use air-conditioning equipment 15.4 2.3 1.2 0.5 0.6 7.9 1.9 1.2 0.7 6.0
Summer indoor temperature at night                    
69 degrees or less 25.8 9.2 4.5 2.3 2.5 4.4 1.6 1.0 0.6 2.8
70 degrees 20.0 7.9 3.9 1.7 2.4 3.3 1.1 0.6 0.5 2.2
71 to 73 degrees 19.1 8.6 4.8 1.1 2.7 2.2 0.8 0.5 0.3 1.4
74 to 76 degrees 23.3 10.1 5.7 1.0 3.5 4.3 1.5 0.6 0.9 2.8
77 to 79 degrees 10.4 4.9 2.7 0.6 1.6 2.5 0.9 0.2 0.7 1.6
80 degrees or more 4.2 1.4 0.7 Q 0.5 1.7 0.7 Q 0.5 1.0
>Do not use air-conditioning equipment 15.4 2.3 1.2 0.5 0.6 7.9 1.9 1.2 0.7 6.0
Air-conditioned basement                    
Yes 14.2 2.6 2.3 0.4 N 1.3 1.0 1.0 N 0.3
No 17.5 2.7 1.9 0.8 Q 1.3 0.5 0.5 Q 0.8
Not asked (air-conditioned homes with no basement) 39.9 24.2 11.2 3.8 9.2 10.1 3.1 0.7 2.4 7.0
Not asked (un-air-conditioned homes, apartments, and mobile homes) 46.7 14.9 8.1 2.2 4.5 13.7 3.9 2.1 1.8 9.8
Air-conditioned attic                    
Yes 1.6 0.4 0.2 Q Q 0.2 Q Q Q Q
No 39.9 18.4 9.4 2.9 6.0 5.9 2.0 1.2 0.9 3.8
Not asked (air-conditioned homes with no attic) 30.0 10.8 5.7 1.9 3.1 6.6 2.5 1.0 1.5 4.1
Not asked (un-air-conditioned homes, apartments, and mobile homes) 46.7 14.9 8.1 2.2 4.5 13.7 3.9 2.1 1.8 9.8
Air-conditioned, attached garage                    
Yes 1.0 0.5 0.3 Q Q 0.2 Q Q Q 0.1
No 41.1 15.3 7.5 1.9 5.9 9.2 3.3 1.5 1.8 5.8
Not asked (air-conditioned homes with no attached garage) 29.4 13.8 7.5 3.0 3.3 3.3 1.2 0.6 0.6 2.1
Not asked (un-air-conditioned homes, apartments, and mobile homes) 46.7 14.9 8.1 2.2 4.5 13.7 3.9 2.1 1.8 9.8
Dehumidifiers and usage                    
Have a dehumidifier 16.7 3.5 2.6 0.5 0.4 0.9 0.2 Q Q 0.7
Do not use 0.4 Q Q Q Q Q N N N Q
Used less than 4 months 5.5 0.8 0.5 0.2 Q 0.4 Q Q Q 0.3
Used 4 to 6 months 6.5 1.4 1.1 Q Q 0.2 Q Q N 0.2
Used 7 to 9 months 2.0 0.5 0.4 Q Q Q Q Q N Q
Used 10 to 11 months Q Q Q N N N N N N N
Turned on all 12 months 2.1 0.6 0.5 Q Q Q Q Q N Q
Do not have a dehumidifier 101.5 41.0 20.9 6.7 13.4 25.5 8.3 4.1 4.2 17.2
Use an evaporative or swamp cooler (asked only in arid areas)                    
Yes 2.8 0.5 0.3 Q Q 2.3 1.5 0.6 0.8 0.8
No 54.8 31.9 14.3 4.0 13.7 22.9 6.6 3.1 3.5 16.4
Not asked 60.6 12.0 8.9 3.1 N 1.2 Q Q N 0.7
Fan types used (more than one may apply)                    
Ceiling fans 85.1 36.1 18.5 5.5 12.2 17.0 6.6 3.0 3.6 10.4
Floor, window, or table fans 54.4 17.1 9.0 2.9 5.3 12.4 3.3 1.8 1.5 9.1
Whole house fans 6.1 1.9 1.2 0.2 0.4 1.7 0.5 0.2 0.2 1.3
Attic fans 8.7 3.4 2.2 0.4 0.7 1.5 0.5 0.4 Q 0.9
Number of ceiling fans used                    
0 33.1 8.3 5.0 1.7 1.6 9.4 1.9 1.2 0.7 7.5
1 21.3 6.1 3.5 1.0 1.6 6.0 1.7 1.0 0.7 4.3
2 18.8 7.6 4.5 1.1 2.0 3.6 1.5 0.6 0.8 2.1
3 15.2 6.5 3.0 1.1 2.4 2.5 1.0 0.6 0.4 1.6
4 or more 29.8 15.9 7.4 2.2 6.2 4.9 2.4 0.8 1.6 2.5

1Housing characteristics data were collected between August 2015 and April 2016.
2Total 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 responded.
N = No cases responded.

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

Source: U.S. Energy Information Administration, Office of Energy Consumption and Efficiency Statistics, Forms EIA-457A and EIA-457C of the 2015 Residential Energy Consumption Survey.