Energy · IECC 2021 §R402.4.1.2 / §R402.4.1.3
Blower Door Test Air Leakage Limit
House under blower door test: 5.0 ACH or 0.28 cfm per sq ft at 50 Pa, the 5.0 and 3.0 ACH climate zone split, the 0.30 cfm alternative for individual units, and the conditions during the test.. Referenced to IECC 2021 §R402.4.1.2 / §R402.4.1.3.
The rest of Blower Door Test Air Leakage Limit is for members
You're reading the opening of Blower Door Test Air Leakage Limit. Members see the complete text, every cross-reference and the tools on this page — free for 14 days, no card required.
- The annotated detail diagram with dimension callouts
- The code section it illustrates, in full
- Related diagrams in the same category
- Download and insert into a project
No card required. After the 14-day trial, plans start at $29/mo.
Our previews are real data — live counts, no placeholders. We publish our error log →