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LEED v4
Homes
Energy and Atmosphere
Air infiltration

LEED CREDIT

Homes-v4 EAc7: Air infiltration 1-2 points

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USGBC logo

© Copyright U.S. Green Building Council, Inc. All rights reserved.

Intent

To minimize waste of energy caused by uncontrolled air leakage into and from conditioned spaces.

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
IECC climate zone
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

ACH = Air changes per hour
cfm = cubic feet per minute
ELR = envelope leakage ratio
IECC = International Energy Conservation Code
sf = square feet
cmm = cubic meters per minute

Credit only available for projects using the EA prescriptive path’
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USGBC logo

© Copyright U.S. Green Building Council, Inc. All rights reserved.

Intent

To minimize waste of energy caused by uncontrolled air leakage into and from conditioned spaces.

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
IECC climate zone
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

ACH = Air changes per hour
cfm = cubic feet per minute
ELR = envelope leakage ratio
IECC = International Energy Conservation Code
sf = square feet
cmm = cubic meters per minute

Credit only available for projects using the EA prescriptive path’
See all LEEDuser forum discussions about this credit » Subscribe to new discussions about Homes-v4 EAc7