HVAC Costs by State
| State | Heating degree days | Cooling degree days | Median year built |
|---|
| Alabama | 2,393 | 2,226 | 1983 |
| Alaska | 10,844 | 10 | 1985 |
| Arizona | 1,496 | 3,580 | 1991 |
| Arkansas | 3,435 | 1,868 | 1987 |
| California | 1,813 | 1,197 | 1975 |
| Colorado | 5,885 | 707 | 1986 |
| Connecticut | 5,653 | 799 | 1962 |
| Delaware | 4,668 | 1,183 | 1976 |
| District of Columbia | 4,048 | 1,648 | 1957 |
| Florida | 470 | 3,756 | 1987 |
| Georgia | 2,613 | 1,935 | 1987 |
| Hawaii | 34 | 3,303 | 1980 |
| Idaho | 5,907 | 767 | 1991 |
| Illinois | 6,042 | 936 | 1969 |
| Indiana | 5,683 | 967 | 1975 |
| Iowa | 6,522 | 931 | 1974 |
| Kansas | 4,807 | 1,534 | 1977 |
| Kentucky | 4,400 | 1,333 | 1978 |
| Louisiana | 1,505 | 2,892 | 1976 |
| Maine | 7,284 | 394 | 1962 |
| Maryland | 4,352 | 1,383 | 1976 |
| Massachusetts | 6,006 | 684 | 1954 |
| Michigan | 6,528 | 675 | 1963 |
| Minnesota | 7,870 | 640 | 1977 |
| Mississippi | 2,275 | 2,379 | 1982 |
| Missouri | 4,675 | 1,507 | 1975 |
| Montana | 7,462 | 384 | 1978 |
| Nebraska | 6,083 | 1,079 | 1975 |
| Nevada | 2,642 | 2,951 | 1995 |
| New Hampshire | 6,949 | 525 | 1970 |
| New Jersey | 4,983 | 1,094 | 1964 |
| New Mexico | 4,101 | 1,327 | 1983 |
| New York | 5,086 | 1,014 | 1954 |
| North Carolina | 3,249 | 1,662 | 1991 |
| North Dakota | 8,897 | 451 | 1988 |
| Ohio | 5,546 | 935 | 1967 |
| Oklahoma | 3,545 | 1,986 | 1980 |
| Oregon | 4,532 | 409 | 1980 |
| Pennsylvania | 5,095 | 1,105 | 1953 |
| Rhode Island | 5,567 | 772 | 1951 |
| South Carolina | 2,495 | 2,043 | 1989 |
| South Dakota | 7,469 | 731 | 1985 |
| Tennessee | 3,590 | 1,666 | 1984 |
| Texas | 1,811 | 2,968 | 1988 |
| Utah | 5,410 | 1,165 | 1990 |
| Vermont | 7,295 | 528 | 1960 |
| Virginia | 4,061 | 1,401 | 1980 |
| Washington | 4,897 | 272 | 1983 |
| West Virginia | 4,929 | 989 | 1962 |
| Wisconsin | 7,231 | 605 | 1972 |
| Wyoming | 7,548 | 380 | 1978 |