Component | Units | Best estimate |
Maximum |
Minimum |
||
Sill foundation-Wall | Caulked | in2/ft of perimeter | 0.04 |
0.06 |
0.02 |
|
Not caulked | in2/ft of perimeter | 0.19 |
0.19 |
0.05 |
||
Joints between ceiling and walls | Joints (only if not taped or plastered and no vapor barrier) | in2/ft of wall | 0.07 |
0.12 |
0.02 |
|
Windows | Casement | Weather-stripped | in2/ft2 of window | 0.011 |
0.017 |
0.006 |
Not weather-stripped | in2/ft2 of window | 0.023 |
0.034 |
0.011 |
||
Awning | Weather-stripped | in2/ft2 of window | 0.011 |
0.017 |
0.006 |
|
Not weather-stripped | in2/ft2 of window | 0.023 |
0.034 |
0.011 |
||
Single-hung | Weather-stripped | in2/ft2 of window | 0.032 |
0.042 |
0.026 |
|
Not weather-stripped | in2/ft2 of window | 0.063 |
0.083 |
0.052 |
||
Double-hung | Weather-stripped | in2/ft2 of window | 0.043 |
0.063 |
0.023 |
|
Not weather-stripped | in2/ft2 of window | 0.086 |
0.126 |
0.046 |
||
Single-slider | Weather-stripped | in2/ft2 of window | 0.026 |
0.039 |
0.013 |
|
Not weather-stripped | in2/ft2 of window | 0.052 |
0.077 |
0.026 |
||
Double-slider | Weather-stripped | in2/ft2 of window | 0.037 |
0.054 |
0.02 |
|
Not weather-stripped | in2/ft2 of window | 0.074 |
0.011 |
0.04 |
||
Component | Units | Best estimate |
Maximum |
Minimum |
||
Doors | Single door | Weather-stripped | in2/ft2 of door | 0.114 |
0.215 |
0.043 |
Not weather-stripped | in2/ft2 of door | 0.157 |
0.243 |
0.086 |
||
Double door | Weather-stripped | in2/ft2 of door | 0.114 |
0.215 |
0.043 |
|
Not weather-stripped | in2/ft2 of door | 0.16 |
0.32 |
0.1 |
||
Access to attic or crawl space | Weather-stripped | in2 per access | 2.8 |
2.8 |
1.2 |
|
Not weather-stripped | in2 per access | 4.6 |
4.6 |
1.6 |
||
Wall-Window frame | Wood frame wall | Caulked | in2/ft2 of window | 0.004 |
0.007 |
0.004 |
No caulking | in2/ft2 of window | 0.024 |
0.038 |
0.022 |
||
Masonry wall | Caulked | in2/ft2 of window | 0.019 |
0.03 |
0.016 |
|
No caulking | in2/ft2 of window | 0.093 |
0.15 |
0.082 |
||
Wall-Door frame | Wood wall | Caulked | in2/ft2 of door | 0.004 |
0.004 |
0.001 |
No caulking | in2/ft2 of door | 0.024 |
0.024 |
0.009 |
||
Masonry wall | Caulked | in2/ft2 of door | 0.0143 |
0.0143 |
0.004 |
|
No caulking | in2/ft2 of door | 0.072 |
0.072 |
0.024 |
||
Component | Units | Best estimate |
Maximum |
Minimum |
||
Domestic hot water systems | Gas water heater (only if in conditioned space) | in2 | 3.1 |
3.9 |
2.325 |
|
Electric outlets and light fixtures | Electric outlets and switches | Gasketed | in2 per outlet and switch | 0 |
0 |
0 |
Not gasketed | in2 per outlet and switch | 0.076 |
0.16 |
0 |
||
Recessed light fixtures | in2 per fixture | 1.6 |
3.1 |
1.6 |
||
Pipe and duct penetrations through envelope | Pipes | Caulked or sealed | in2 per pipe | 0.155 |
0.31 |
0 |
Not caulked or sealed | in2 per pipe | 9.3 |
1.55 |
0.31 |
||
Ducts | Sealed or with continuous vapor barrier | in2 per duct | 0.25 |
0.25 |
0 |
|
Unsealed and without vapor barrier | in2 per duct | 3.7 |
3.7 |
2.2 |
||
Fireplace | Without insert | Damper closed, | in2 per fireplace | 10.7 |
13 |
8.4 |
Damper open | in2 per fireplace | 54 |
59 |
50 |
||
With insert | Damper closed | in2 per fireplace | 5.6 |
7.1 |
4.03 |
|
Damper open or absent | in2 per fireplace | 10 |
14 |
6.2 |
||
Component | Units | Best estimate |
Maximum |
Minimum |
||
Exhaust fans | Kitchen fan | Damper closed, | in2 per fan | 0.775 |
1.1 |
0.47 |
Damper open | in2 per fan | 6 |
6.5 |
5.6 |
||
Bathroom fan | Damper closed | in2 per fan | 1.7 |
1.9 |
1.6 |
|
Damper open | in2 per fan | 3.1 |
3.4 |
2.8 |
||
Dryer vent | Damper closed | in2 per vent | 0.47 |
0.9 |
0 |
|
Heating
ducts and furnace Forced-air systems |
Ductwork (only if in unconditioned space) | Joints taped or caulked | in2 per house | 11 |
11 |
5 |
Joints not taped or caulked | in2 per house | 22 |
22 |
11 |
||
Furnace (only if in conditioned space) | Sealed combustion furnace | in2 per furnace | 0 |
0 |
0 |
|
Retention head burner furnace | in2 per furnace | 5 |
6.2 |
3.1 |
||
Retention head plus stack damper | in2 per furnace | 3.7 |
4.6 |
2.8 |
||
Furnace with stack damper | in2 per furnace | 4.6 |
6.2 |
3.1 |
||
Air conditioner | Wall or window unit | in2 per unit | 3.7 |
5.6 |
0 |