Please upgrade your browser. This site requires a newer version to work correctly. Read more
Our "watch" feature allows you to stay current on all aspects of this specific credit. In your account, you can control what you get updated on and how you receive your notifications. Hide

LEED BD+C: Homes | v4

Air infiltration

Possible 2 points

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. The rate of air leakage to outside must be tested and verified by a qualified energy rater.

Case 2. Multifamily

Meet the air leakage requirements shown in Table 1 or Table 2. The rate of air leakage to outside must be tested and verified by a qualified energy rater.

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 .925 1
.1375 .115 .925 .675 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’
Join LEEDuser

Ask questions, share tips, and get notified of new forum posts by joining LEEDuser, a tool developed by BuildingGreen and supported by USGBC!

  • Share on Twitter
  • Share on Facebook
  • Share on LinkedIn
  • Print to PDF
Sample forms

No sample form available for this credit.

View all sample forms

0 commentsLeave a comment

Leave a comment Don't have an account? Create one

You must be signed in to leave a comment.