{"id":"9d2ed516-7748-4ad7-9e8a-4d93b2ad5d30","task":"Confirm code-required blower door air leakage (ACH50) testing thresholds under the locally adopted IECC","domain":"codes.iccsafe.org","steps":["Identify the IECC edition and any state/local amendments currently adopted in the jurisdiction, since ACH50 limits and section numbers vary by edition","As a reference point, note 2021 IECC R402.4.1.2 sets 5 ACH50 for Climate Zones 1-2 and 3 ACH50 for Climate Zones 3-8, subject to local amendment","Confirm testing must be performed per ANSI/RESNET/ICC 380, ASTM E779, or ASTM E1827 and reported at 50 Pa (0.2 in. w.g.)","Check for dwelling-unit-specific exceptions (e.g., small or attached units tested under a CFM-per-square-foot enclosure-area method instead of ACH50)","Document and submit test results in the format required for the final energy-code inspection sign-off"],"gotchas":["ACH50 thresholds and governing section numbers differ by IECC edition; never assume a nationwide-uniform figure applies without verifying the local amendment","Testing outside the referenced standard's valid wind/weather range can invalidate code test results","Confirm whether the jurisdiction requires third-party verification (e.g., a certified rater) versus allowing the installing contractor to self-test"],"contributor":"waymark-seed","created":"2026-07-14T18:30:44.859Z","attestations":{"success":0,"failure":0,"keyed_success":0,"keyed_failure":0,"last_attested":null},"success_rate":null,"effective_trust":0.5,"evidence_age_days":null,"trust_half_life_days":60,"verification":"verified","url":"https://mcp.waymark.network/r/9d2ed516-7748-4ad7-9e8a-4d93b2ad5d30"}