Homes-v4 EAc7: Air infiltration
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Credit language
© Copyright U.S. Green Building Council, Inc. All rights reserved.
Requirements
Case 1. Single Family
Meet the air leakage requirements shown in Table 1 or Table 2.Case 2. Multifamily
Meet the air leakage requirements shown in Table 1 or Table 2. Meet the requirements for leakage to outside the conditioned envelope for each dwelling unit, unless the whole building can be entirely and sufficiently depressurized by a blower door(s).Table 1. Points for reducing air leakage, in ACH50
| IECC climate zone | Points | |||
|---|---|---|---|---|
| 1–2 | 3–4 | 5–7 | 8 | |
| 4.25 | 3.5 | 2.75 | 2.0 | 1 |
| 3.0 | 2.5 | 2.0 | 1.5 | 2 |
Table 2a. Points for reducing air leakage, in cfm50 per sf envelope area
| Performance requirements IECC climate zone |
Points | |||
|---|---|---|---|---|
| 1–2 | 3–4 | 5–7 | 8 | |
| .195 | .16 | .125 | .0925 | 1 |
| .1375 | .115 | .0925 | .0675 | 2 |
Table 2b. Points for reducing air leakage, in cmm50 per 100 square meter envelope area
Performance requirements |
|||||
|---|---|---|---|---|---|
1–2 |
3–4 |
5–7 |
8 |
Points |
|
5.94 |
4.87 |
3.81 |
2.82 |
1 |
|
4.19 |
3.50 |
2.82 |
2.06 |
2 |
|
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Credit language
© Copyright U.S. Green Building Council, Inc. All rights reserved.
Requirements
Case 1. Single Family
Meet the air leakage requirements shown in Table 1 or Table 2.Case 2. Multifamily
Meet the air leakage requirements shown in Table 1 or Table 2. Meet the requirements for leakage to outside the conditioned envelope for each dwelling unit, unless the whole building can be entirely and sufficiently depressurized by a blower door(s).Table 1. Points for reducing air leakage, in ACH50
| IECC climate zone | Points | |||
|---|---|---|---|---|
| 1–2 | 3–4 | 5–7 | 8 | |
| 4.25 | 3.5 | 2.75 | 2.0 | 1 |
| 3.0 | 2.5 | 2.0 | 1.5 | 2 |
Table 2a. Points for reducing air leakage, in cfm50 per sf envelope area
| Performance requirements IECC climate zone |
Points | |||
|---|---|---|---|---|
| 1–2 | 3–4 | 5–7 | 8 | |
| .195 | .16 | .125 | .0925 | 1 |
| .1375 | .115 | .0925 | .0675 | 2 |
Table 2b. Points for reducing air leakage, in cmm50 per 100 square meter envelope area
Performance requirements |
|||||
|---|---|---|---|---|---|
1–2 |
3–4 |
5–7 |
8 |
Points |
|
5.94 |
4.87 |
3.81 |
2.82 |
1 |
|
4.19 |
3.50 |
2.82 |
2.06 |
2 |
|