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LEED v2008
Homes
Energy and Atmosphere
Air infiltration

LEED CREDIT

Homes-v2008 EAc3: Air infiltration 2-3 points

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Credit language

USGBC logo

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

Intent

Minimize energy consumption caused by uncontrolled air leakage into and out of conditioned spaces.

Requirements

Prerequisites

3.1 Reduced envelope leakage. Meet the air leakage requirements shown in Table 1. The air leakage rate must be tested and verified by an qualified energy rater.

Credits

3.2 Greatly reduced envelope leakage (2 points). Meet the air leakage requirements shown in Table 1. The air leakage rate must be tested and verified by an qualified energy rater.

OR

3.3 Minimal envelope leakage (3 points). Meet the air leakage requirements shown in Table 1. The air leakage rate must be tested and verified by an qualified energy rater.

Table 1 Air Leakage Requirements

LEED Criteria Performance requirements
(in ACH50)
IECC Climate Zones
1-2
IECC Climate Zones
3-4
IECC Climate Zones
5-7
IECC Climate Zone
8
EA 3.1: Reduced Envelope Leakage
(mandatory)
7.0 6.0 5.0 4.0
EA 3.2: Greatly Reduced Envelope Leakage
(optional)
5.0 4.25 3.5 2.75
EA 3.3: Minimal Envelope Leakage
(optional)
3.0 2.5 2.0 1.5
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USGBC logo

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

Intent

Minimize energy consumption caused by uncontrolled air leakage into and out of conditioned spaces.

Requirements

Prerequisites

3.1 Reduced envelope leakage. Meet the air leakage requirements shown in Table 1. The air leakage rate must be tested and verified by an qualified energy rater.

Credits

3.2 Greatly reduced envelope leakage (2 points). Meet the air leakage requirements shown in Table 1. The air leakage rate must be tested and verified by an qualified energy rater.

OR

3.3 Minimal envelope leakage (3 points). Meet the air leakage requirements shown in Table 1. The air leakage rate must be tested and verified by an qualified energy rater.

Table 1 Air Leakage Requirements

LEED Criteria Performance requirements
(in ACH50)
IECC Climate Zones
1-2
IECC Climate Zones
3-4
IECC Climate Zones
5-7
IECC Climate Zone
8
EA 3.1: Reduced Envelope Leakage
(mandatory)
7.0 6.0 5.0 4.0
EA 3.2: Greatly Reduced Envelope Leakage
(optional)
5.0 4.25 3.5 2.75
EA 3.3: Minimal Envelope Leakage
(optional)
3.0 2.5 2.0 1.5
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