| Characteristic | Warm-air furnace | Heat pump | Other types or none | Hot water or steam |
|---|---|---|---|---|
| - | - | - | - | - |
| - | - | - | - | - |
| - | - | - | - | - |
| - | - | - | - | - |
| - | - | - | - | - |
| - | - | - | - | - |
| - | - | - | - | - |
| - | - | - | - | - |
| - | - | - | - | - |
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Source
Release date
June 2012
Region
United States
Survey time period
1975 to 2011
Supplementary notes
Includes houses built for rent (not shown separately).
A value of zero denotes unavailable data.
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