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Explore this LEED credit
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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 |
|
What does it cost?
Cost estimates for this credit
On each BD+C v4 credit, LEEDuser offers the wisdom of a team of architects, engineers, cost estimators, and LEED experts with hundreds of LEED projects between then. They analyzed the sustainable design strategies associated with each LEED credit, but also to assign actual costs to those strategies.
Our tab contains overall cost guidance, notes on what “soft costs” to expect, and a strategy-by-strategy breakdown of what to consider and what it might cost, in percentage premiums, actual costs, or both.
This information is also available in a full PDF download in The Cost of LEED v4 report.
Learn more about The Cost of LEED v4 »Frequently asked questions
See all forum discussions about this credit »Documentation toolkit
The motherlode of cheat sheets
LEEDuser’s Documentation Toolkit is loaded with calculators to help assess credit compliance, tracking spreadsheets for materials, sample templates to help guide your narratives and LEED Online submissions, and examples of actual submissions from certified LEED projects for you to check your work against. To get your plaque, start with the right toolkit.
© 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 |
|
