Data release date: March 2023

Number of 

housing units 

(million)

Total apartment 

unitsa Totalb Heated Cooled

All homes 32.18 29.79 26.64 20.23

Census region and division

Northeast 8.24 7.70 7.52 4.26

New England 2.10 2.03 2.01 0.92

Middle Atlantic 6.14 5.67 5.51 3.34

Midwest 6.15 5.90 5.78 4.10

East North Central 4.42 4.33 4.24 2.95

West North Central 1.73 1.57 1.55 1.15

South 10.19 9.67 8.15 8.41

South Atlantic 5.67 5.65 4.48 5.01

East South Central 1.25 1.14 1.10 0.98

West South Central 3.27 2.88 2.57 2.43

West 7.59 6.53 5.18 3.46

Mountain 1.99 1.79 1.63 1.30

Mountain North 0.99 0.92 0.89 0.56

Mountain South 1.00 0.87 0.75 0.74

Pacific 5.60 4.74 3.54 2.16

Census urban/rural classificationc

Urban 31.29 29.01 25.89 19.66

Urbanized area 29.15 27.02 23.95 18.57

Urban cluster 2.14 1.99 1.93 1.09

Rural 0.89 0.79 0.75 0.57

Climate regiond

Very cold/Cold 10.52 10.11 9.94 6.14

Mixed-humid 9.75 8.94 8.61 6.51

Mixed-dry/Hot-dry 4.24 3.52 2.61 2.36

Hot-humid 5.62 5.44 3.97 4.75

Marine 2.04 1.78 1.51 0.47

Table HC10.7 Total square footage of apartment units, 2020

Total square footage (billion square feet)
Number of 

housing units 

(million)

Total apartment 

unitsa Totalb Heated Cooled

All homes 32.18 29.79 26.64 20.23

Table HC10.7 Total square footage of apartment units, 2020

Total square footage (billion square feet)

Year of construction

Before 1950 5.44 5.13 4.89 2.64

1950 to 1959 2.01 1.63 1.52 0.88

1960 to 1969 3.53 3.06 2.77 1.89

1970 to 1979 5.56 4.99 4.33 3.32

1980 to 1989 5.03 4.60 4.01 3.27

1990 to 1999 3.50 3.43 3.02 2.57

2000 to 2009 3.89 3.83 3.25 3.03

2010 to 2015 1.78 1.70 1.51 1.44

2016 to 2020 1.43 1.42 1.34 1.20

Fuels used for any use (more than 

one may apply)

Electricity 32.18 29.79 26.64 20.23

Natural gas 17.89 16.50 15.15 10.61

Propanee 0.76 0.67 0.60 0.44

Wood 0.58 0.62 0.61 0.43

Fuel oil or kerosene 0.98 0.89 0.87 0.43

Main space heating fuel

Natural gas 11.90 11.24 11.24 7.34

Electricity 16.26 14.93 14.43 10.63

Fuel oil or kerosene 0.84 0.76 0.76 0.36

Propane 0.19 0.15 0.15 0.08

Wood Q Q Q Q

Some other fuelf Q Q Q Q

Does not use heating equipment 2.92 2.66 0.00 1.80

Air-conditioning equipment

Uses air-conditioning equipment 27.13 25.37 22.85 20.23

Does not use air-conditioning 

equipment 5.05 4.43 3.79 0.00

Fuel used by main water heater

Natural gas 13.51 12.41 11.44 7.95

Electricity 17.57 16.39 14.33 11.75

Propane 0.30 0.28 0.25 0.19

Fuel oil or kerosene 0.67 0.60 0.58 0.28

Some other fuelf 0.12 0.11 0.05 0.06
Number of 

housing units 

(million)

Total apartment 

unitsa Totalb Heated Cooled

All homes 32.18 29.79 26.64 20.23

Table HC10.7 Total square footage of apartment units, 2020

Total square footage (billion square feet)

Indoor light bulbs used at least 4 

hours a day

0 to 2 14.93 13.14 11.40 8.70

3 to 5 8.80 8.19 7.37 5.51

6 to 9 5.38 5.12 4.74 3.66

10 to 19 2.63 2.82 2.61 2.00

20 or more 0.44 0.51 0.51 0.36

Total number of rooms (excluding 

bathrooms)

1 or 2 4.33 2.73 2.42 1.94

3 7.57 5.80 4.98 3.76

4 10.02 9.02 8.06 6.04

5 6.30 6.72 6.11 4.69

6 2.64 3.43 3.07 2.56

7 0.65 0.89 0.83 0.54

8 0.31 0.48 0.44 0.29

9 or more 0.36 0.73 0.72 0.42

Number of bedrooms

0 1.68 0.95 0.82 0.67

1 12.38 9.30 8.36 6.02

2 14.56 14.71 12.96 10.34

3 2.98 3.83 3.55 2.59

4 0.37 0.61 0.55 0.40

5 or more 0.19 0.40 0.39 0.22

Adequacy of insulation

Well insulated 6.81 6.45 5.79 4.65

Adequately insulated 16.63 15.48 13.83 10.68

Poorly insulated 6.85 6.29 5.76 4.05

No insulation 1.88 1.58 1.26 0.85

Type of glass in windows

Single-pane glass 15.79 13.96 12.20 9.31

Double-pane glass 16.05 15.50 14.13 10.70

Triple-pane glass 0.34 0.34 0.31 0.22
Number of 

housing units 

(million)

Total apartment 

unitsa Totalb Heated Cooled

All homes 32.18 29.79 26.64 20.23

Table HC10.7 Total square footage of apartment units, 2020

Total square footage (billion square feet)

Number of household members

1 member 14.47 12.30 11.14 8.19

2 members 9.82 9.39 8.31 6.71

3 members 3.54 3.49 3.17 2.23

4 members 2.58 2.62 2.32 1.73

5 members 1.04 1.18 1.01 0.81

6 or more members 0.71 0.81 0.68 0.57

2020 annual household income

Less than $5,000 2.27 1.90 1.66 1.12

$5,000 to $9,999 2.14 1.78 1.60 1.07

$10,000 to $19,999 4.22 3.57 3.24 2.08

$20,000 to $39,999 7.76 7.04 6.36 4.93

$40,000 to $59,999 5.27 4.87 4.27 3.42

$60,000 to $99,999 5.62 5.29 4.83 3.63

$100,000 to $149,999 2.59 2.66 2.34 1.96

$150,000 or more 2.31 2.69 2.33 2.04
Number of 

housing units 

(million)

Total apartment 

unitsa Totalb Heated Cooled

All homes 32.18 29.79 26.64 20.23

Table HC10.7 Total square footage of apartment units, 2020

Total square footage (billion square feet)

Ownership of housing unitg

Owned 4.32 5.14 4.50 3.84

Rented 27.86 24.65 22.14 16.39

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 apartment unitsincludes all primary occupied housing units located in apartment buildings 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.

c Housing units are classified using criteria created by the U.S. Census Bureau based on 2010 Census data. Urbanized areas 

are densely settled groupings of blocks or tracts with 50,000 or more people, while urban clusters have at least 2,500 but 

less than 50,000 people. All other areas are rural.

d The Building America program, sponsored by the U.S. Department of Energy’s Office of Energy Efficiency and Renewable 

Energy (EERE), created these climate regions. We combined climate regions for this publication. The Subarctic region is 

included with data for Very-cold/Cold .

e Households that use propane only for outdoor grilling are excluded from the RECS estimate of households using 

propane. 

f

Some other fuel includes coal and district steam.

g Rented includes households that occupy their primary housing unit without paying rent. 

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. 
Data release date: March 2023

Percentage of 

housing units 

Total apartment 

unitsa Totalb Heated Cooled

All homes 100.00 100.00 100.00 100.00

Census region and division

Northeast 25.62 25.84 28.23 21.05

New England 6.52 6.82 7.55 4.56

Middle Atlantic 19.10 19.02 20.68 16.49

Midwest 19.12 19.80 21.72 20.27

East North Central 13.75 14.52 15.91 14.58

West North Central 5.38 5.28 5.81 5.70

South 31.67 32.46 30.61 41.59

South Atlantic 17.63 18.97 16.82 24.75

East South Central 3.88 3.84 4.12 4.84

West South Central 10.16 9.65 9.67 12.00

West 23.59 21.90 19.44 17.09

Mountain 6.18 6.00 6.14 6.43

Mountain North 3.07 3.07 3.33 2.76

Mountain South 3.11 2.93 2.81 3.68

Pacific 17.41 15.90 13.31 10.66

Census urban/rural classificationc

Urban 97.24 97.35 97.19 97.19

Urbanized area 90.59 90.67 89.93 91.79

Urban cluster 6.65 6.68 7.26 5.40

Rural 2.76 2.65 2.81 2.81

Climate regiond

Very cold/Cold 32.69 33.92 37.32 30.35

Mixed-humid 30.30 30.01 32.34 32.17

Mixed-dry/Hot-dry 13.19 11.83 9.79 11.66

Hot-humid 17.46 18.26 14.90 23.49

Marine 6.35 5.98 5.66 2.33

Table HC10.7 Total square footage of apartment units, 2020

Percentage of total square footage
Percentage of 

housing units 

Total apartment 

unitsa Totalb Heated Cooled

All homes 100.00 100.00 100.00 100.00

Table HC10.7 Total square footage of apartment units, 2020

Percentage of total square footage

Year of construction

Before 1950 16.91 17.21 18.35 13.04

1950 to 1959 6.26 5.48 5.71 4.34

1960 to 1969 10.96 10.28 10.39 9.33

1970 to 1979 17.29 16.74 16.26 16.43

1980 to 1989 15.63 15.44 15.05 16.18

1990 to 1999 10.88 11.50 11.32 12.70

2000 to 2009 12.09 12.85 12.22 14.96

2010 to 2015 5.54 5.71 5.69 7.11

2016 to 2020 4.45 4.78 5.02 5.91

Fuels used for any use (more than 

one may apply)

Electricity 100.00 100.00 100.00 100.00

Natural gas 55.60 55.37 56.86 52.46

Propanee 2.35 2.24 2.24 2.19

Wood 1.80 2.07 2.29 2.11

Fuel oil or kerosene 3.04 2.99 3.26 2.13

Main space heating fuel

Natural gas 37.00 37.73 42.20 36.26

Electricity 50.53 50.11 54.16 52.54

Fuel oil or kerosene 2.62 2.55 2.85 1.79

Propane 0.60 0.51 0.57 0.40

Wood Q Q Q Q

Some other fuelf Q Q Q Q

Does not use heating equipment 9.09 8.92 0.00 8.89

Air-conditioning equipment

Uses air-conditioning equipment 84.30 85.13 85.78 100.00

Does not use air-conditioning 

equipment 15.70 14.87 14.22 0.00

Fuel used by main water heater

Natural gas 42.00 41.67 42.93 39.30

Electricity 54.62 55.01 53.80 58.09

Propane 0.93 0.96 0.94 0.94

Fuel oil or kerosene 2.08 2.00 2.16 1.38

Some other fuelf 0.37 0.36 0.18 0.29
Percentage of 

housing units 

Total apartment 

unitsa Totalb Heated Cooled

All homes 100.00 100.00 100.00 100.00

Table HC10.7 Total square footage of apartment units, 2020

Percentage of total square footage

Indoor light bulbs used at least 4 

hours a day

0 to 2 46.41 44.12 42.79 43.02

3 to 5 27.33 27.50 27.68 27.21

6 to 9 16.73 17.20 17.81 18.10

10 to 19 8.17 9.46 9.81 9.88

20 or more 1.36 1.73 1.91 1.79

Total number of rooms (excluding 

bathrooms)

1 or 2 13.45 9.17 9.10 9.58

3 23.54 19.45 18.71 18.60

4 31.14 30.28 30.24 29.84

5 19.58 22.54 22.94 23.16

6 8.21 11.50 11.52 12.63

7 2.02 2.99 3.13 2.68

8 0.95 1.61 1.65 1.41

9 or more 1.10 2.46 2.71 2.10

Number of bedrooms

0 5.22 3.19 3.09 3.29

1 38.49 31.22 31.39 29.77

2 45.26 49.37 48.64 51.10

3 9.27 12.85 13.33 12.79

4 1.16 2.04 2.08 1.98

5 or more 0.59 1.34 1.47 1.08

Adequacy of insulation

Well insulated 21.17 21.64 21.73 22.98

Adequately insulated 51.69 51.94 51.93 52.78

Poorly insulated 21.29 21.12 21.62 20.02

No insulation 5.85 5.30 4.72 4.22

Type of glass in windows

Single-pane glass 49.06 46.85 45.82 46.03

Double-pane glass 49.89 52.01 53.04 52.90

Triple-pane glass 1.05 1.14 1.15 1.07
Percentage of 

housing units 

Total apartment 

unitsa Totalb Heated Cooled

All homes 100.00 100.00 100.00 100.00

Table HC10.7 Total square footage of apartment units, 2020

Percentage of total square footage

Number of household members

1 member 44.98 41.29 41.84 40.46

2 members 30.53 31.53 31.21 33.17

3 members 11.01 11.71 11.89 11.02

4 members 8.03 8.81 8.71 8.53

5 members 3.23 3.95 3.81 4.03

6 or more members 2.22 2.71 2.54 2.79

2020 annual household income

Less than $5,000 7.04 6.38 6.24 5.51

$5,000 to $9,999 6.65 5.96 6.01 5.31

$10,000 to $19,999 13.12 11.97 12.18 10.27

$20,000 to $39,999 24.11 23.63 23.86 24.34

$40,000 to $59,999 16.39 16.36 16.04 16.91

$60,000 to $99,999 17.46 17.76 18.14 17.93

$100,000 to $149,999 8.06 8.91 8.78 9.67

$150,000 or more 7.17 9.04 8.75 10.06
Percentage of 

housing units 

Total apartment 

unitsa Totalb Heated Cooled

All homes 100.00 100.00 100.00 100.00

Table HC10.7 Total square footage of apartment units, 2020

Percentage of total square footage

Ownership of housing unitg

Owned 13.43 17.27 16.88 18.97

Rented 86.57 82.73 83.12 81.03

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 apartment unitsincludes all primary occupied housing units located in apartment buildings 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.

c Housing units are classified using criteria created by the U.S. Census Bureau based on 2010 Census data. Urbanized areas 

are densely settled groupings of blocks or tracts with 50,000 or more people, while urban clusters have at least 2,500 but 

less than 50,000 people. All other areas are rural.

d The Building America program, sponsored by the U.S. Department of Energy’s Office of Energy Efficiency and Renewable 

Energy (EERE), created these climate regions. We combined climate regions for this publication. The Subarctic region is 

included with data for Very-cold/Cold .

e Households that use propane only for outdoor grilling are excluded from the RECS estimate of households using 

propane. 

f

Some other fuel includes coal and district steam.

g Rented includes households that occupy their primary housing unit without paying rent. 

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. 
Data release date: March 2023

RSEs for 

number of 

housing units 

Total apartment 

unitsa Totalb Heated Cooled

All homes 0.00 0.70 1.04 1.42

Census region and division

Northeast 0.00 1.57 1.70 3.17

New England 0.00 2.22 2.33 4.70

Middle Atlantic 0.00 1.95 2.14 3.70

Midwest 0.00 1.67 1.80 3.54

East North Central 0.00 1.89 2.10 4.12

West North Central 0.00 2.91 3.11 5.35

South 0.00 1.35 2.38 1.83

South Atlantic 0.00 1.77 3.34 2.58

East South Central 0.00 2.44 2.68 4.58

West South Central 0.00 2.51 3.68 3.74

West 0.00 1.14 2.59 3.66

Mountain 0.00 2.69 3.72 5.71

Mountain North 0.00 4.45 4.90 11.06

Mountain South 0.00 2.51 5.55 4.52

Pacific 0.00 1.42 3.41 4.96

Census urban/rural classificationc

Urban 0.30 0.71 1.04 1.48

Urbanized area 0.53 0.79 1.12 1.48

Urban cluster 6.19 7.00 7.18 8.39

Rural 10.45 11.01 11.61 12.29

Climate regiond

Very cold/Cold 1.17 1.79 1.89 3.03

Mixed-humid 1.77 2.52 2.72 3.08

Mixed-dry/Hot-dry 3.02 3.34 5.12 5.32

Hot-humid 2.21 3.17 4.81 3.72

Marine 5.72 6.14 6.75 14.46

Relative standard errors (RSEs) for Table HC10.7 Total square footage of apartment 

units, 2020

RSEs for total square footage 
RSEs for 

number of 

housing units 

Total apartment 

unitsa Totalb Heated Cooled

All homes 0.00 0.70 1.04 1.42

Relative standard errors (RSEs) for Table HC10.7 Total square footage of apartment 

units, 2020

RSEs for total square footage 

Year of construction

Before 1950 4.06 4.68 4.95 6.57

1950 to 1959 7.64 8.07 8.66 10.83

1960 to 1969 4.45 4.68 5.31 6.00

1970 to 1979 3.37 3.68 4.01 4.91

1980 to 1989 3.56 4.31 4.80 5.83

1990 to 1999 5.77 6.59 6.66 8.47

2000 to 2009 4.65 4.89 5.65 5.75

2010 to 2015 6.03 6.14 5.79 6.37

2016 to 2020 7.60 7.94 8.20 8.51

Fuels used for any use (more than 

one may apply)

Electricity 0.00 0.70 1.04 1.42

Natural gas 1.45 1.75 1.92 2.16

Propanee 11.39 11.69 12.58 15.20

Wood 12.98 13.28 13.51 14.77

Fuel oil or kerosene 11.11 11.47 11.74 13.15

Main space heating fuel

Natural gas 2.12 2.43 2.43 3.29

Electricity 1.57 2.06 2.09 2.38

Fuel oil or kerosene 12.66 13.00 13.00 14.95

Propane 20.22 19.99 19.99 23.30

Wood 38.14 41.92 41.92 48.75

Some other fuelf 100.48 100.48 100.48 100.48

Does not use heating equipment 6.45 6.96 0.00 8.28

Air-conditioning equipment

Uses air-conditioning equipment 0.71 1.18 1.34 1.42

Does not use air-conditioning 

equipment 3.83 4.39 4.96 0.00

Fuel used by main water heater

Natural gas 1.94 2.20 2.40 2.84

Electricity 1.46 1.89 1.91 2.47

Propane 16.86 18.53 20.62 24.70

Fuel oil or kerosene 13.74 13.61 13.95 15.29

Some other fuelf 33.74 34.91 44.30 45.03
RSEs for 

number of 

housing units 

Total apartment 

unitsa Totalb Heated Cooled

All homes 0.00 0.70 1.04 1.42

Relative standard errors (RSEs) for Table HC10.7 Total square footage of apartment 

units, 2020

RSEs for total square footage 

Indoor light bulbs used at least 4 

hours a day

0 to 2 2.22 2.29 2.70 2.58

3 to 5 3.20 3.48 3.59 3.99

6 to 9 3.89 4.47 4.40 5.42

10 to 19 6.50 8.11 8.55 8.88

20 or more 19.51 21.30 21.47 22.80

Total number of rooms (excluding 

bathrooms)

1 or 2 5.10 5.71 5.92 6.16

3 2.87 2.99 3.38 4.04

4 2.79 2.93 3.01 3.67

5 3.86 3.92 4.04 4.89

6 6.89 7.09 7.80 8.68

7 14.64 15.93 15.71 20.31

8 17.45 17.40 18.68 22.91

9 or more 15.58 16.50 16.89 23.24

Number of bedrooms

0 9.33 10.80 11.65 12.38

1 2.15 2.53 2.69 2.86

2 1.85 2.00 2.47 2.30

3 5.51 6.05 5.96 8.41

4 17.61 18.96 19.28 23.71

5 or more 23.28 26.36 26.76 39.17

Adequacy of insulation

Well insulated 3.49 3.83 3.98 4.24

Adequately insulated 1.96 2.24 2.23 3.00

Poorly insulated 3.92 4.23 4.59 4.99

No insulation 8.95 9.97 11.46 11.78

Type of glass in windows

Single-pane glass 1.97 2.11 2.60 2.30

Double-pane glass 1.92 2.24 2.29 3.32

Triple-pane glass 17.72 18.81 20.03 21.06
RSEs for 

number of 

housing units 

Total apartment 

unitsa Totalb Heated Cooled

All homes 0.00 0.70 1.04 1.42

Relative standard errors (RSEs) for Table HC10.7 Total square footage of apartment 

units, 2020

RSEs for total square footage 

Number of household members

1 member 1.80 2.25 2.49 2.66

2 members 2.67 3.42 4.03 4.20

3 members 4.73 5.09 5.66 6.39

4 members 6.57 6.63 7.34 8.15

5 members 12.61 13.05 14.25 14.97

6 or more members 13.14 14.18 15.53 17.46

2020 annual household income

Less than $5,000 7.02 7.55 8.07 10.54

$5,000 to $9,999 6.80 6.46 6.90 8.33

$10,000 to $19,999 5.76 6.38 6.49 6.54

$20,000 to $39,999 3.67 3.82 3.78 3.95

$40,000 to $59,999 4.24 4.18 4.72 5.51

$60,000 to $99,999 3.45 3.93 3.98 5.23

$100,000 to $149,999 6.87 7.14 7.11 8.56

$150,000 or more 5.72 6.42 7.27 7.23
RSEs for 

number of 

housing units 

Total apartment 

unitsa Totalb Heated Cooled

All homes 0.00 0.70 1.04 1.42

Relative standard errors (RSEs) for Table HC10.7 Total square footage of apartment 

units, 2020

RSEs for total square footage 

Ownership of housing unitg

Owned 4.13 5.08 5.94 6.19

Rented 0.64 0.91 1.27 1.43

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 apartment unitsincludes all primary occupied housing units located in apartment buildings 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.

c Housing units are classified using criteria created by the U.S. Census Bureau based on 2010 Census data. Urbanized areas 

are densely settled groupings of blocks or tracts with 50,000 or more people, while urban clusters have at least 2,500 but 

less than 50,000 people. All other areas are rural.

d The Building America program, sponsored by the U.S. Department of Energy’s Office of Energy Efficiency and Renewable 

Energy (EERE), created these climate regions. We combined climate regions for this publication. The Subarctic region is 

included with data for Very-cold/Cold.

e Households that use propane only for outdoor grilling are excluded from the RECS estimate of households using 

propane. 

f

Some other fuel includes coal and district steam.

g Rented includes households that occupy their primary housing unit without paying rent.