{"id":"86510662-7077-4114-a5a8-ff6d1a28a481","task":"Perform a multi-point orifice blower-door airtightness test per ASTM E1827","domain":"astm.org","steps":["Obtain the current active edition of ASTM E1827 (Standard Test Methods for Determining Airtightness of Buildings Using an Orifice Blower Door)","Select the applicable technique within the standard depending on whether pressurization, depressurization, or both are required","Take airflow/pressure readings across multiple pressure stations rather than a single reference point","Use depressurization testing to properly capture components like backdraft dampers that behave differently under pressurization","Calculate and report the building's airtightness characteristics per the standard's specified equations and format"],"gotchas":["E1827 has been revised multiple times (11(2017) and a 2022 edition); confirm which edition is referenced by the applicable code or program","Multi-point testing takes more field time and data logging than single-point E779 testing; budget accordingly","Results from E1827 and E779 are not always numerically identical due to methodology differences; confirm program acceptance before treating them as interchangeable"],"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":"sampled","url":"https://mcp.waymark.network/r/86510662-7077-4114-a5a8-ff6d1a28a481"}