{"id":"ibhs-base-forced-air-vent-closure","license":"CC-BY-4.0","data":{"title":"IBHS Wildfire Prepared Home Base forced-air vent closure","shortName":"IBHS Base forced-air vent closure","summary":"The current IBHS Base standard calls for a functional louver or flap on forced-air vents such as dryer and central-vacuum exhausts.","framing":"A documented closure addresses the opening device only. Duct material, termination clearance, lint maintenance, local mechanical-code provisions, and installation remain separate checks.","kind":"program","instrumentId":"ibhs-wildfire-prepared","jurisdiction":"California and Oregon program applicants","appliesToCategories":["vents"],"quotedText":"Forced air vents (e.g., dryer and central vacuum) shall have a functional louver or flap in lieu of mesh.","source":{"title":"2025 Wildfire Prepared Home Technical Standard","url":"https://wildfireprepared.org/wp-content/uploads/WFPH-Standard.pdf","publisher":"Insurance Institute for Business & Home Safety","sourceType":"insurer-checklist","accessedOn":"2026-08-24T00:00:00.000Z","documentDate":"2025-06-17T00:00:00.000Z"},"constraints":[{"attribute":"assemblyRole","op":"eq","value":"dryer-vent"},{"attribute":"functionalClosure","op":"eq","value":true}],"relatedStandards":["ibhs-wildfire-prepared"],"author":"grayson-graham","reviewStatus":"draft","lastVerified":"2026-08-24T00:00:00.000Z"},"applications":[],"products":[{"id":"american-aldes-standard-dryer-wall-hood","name":"American Aldes standard dryer wall hood","url":"/materials/american-aldes-standard-dryer-wall-hood/","categories":["vents"],"complianceStatus":"attribute-match","documentedAttributes":[{"attribute":"assemblyRole","value":"dryer-vent","source":{"title":"Standard dryer wall hood specifications","url":"https://www.aldes-na.com/wp-content/uploads/2017/12/standard-dryer-wall-hood_spec.pdf","publisher":"American Aldes","accessedOn":"2026-08-24T00:00:00.000Z","sourceType":"manufacturer"},"documentLocation":null,"excerpt":null},{"attribute":"functionalClosure","value":true,"source":{"title":"Standard dryer wall hood specifications","url":"https://www.aldes-na.com/wp-content/uploads/2017/12/standard-dryer-wall-hood_spec.pdf","publisher":"American Aldes","accessedOn":"2026-08-24T00:00:00.000Z","sourceType":"manufacturer"},"documentLocation":null,"excerpt":null}]},{"id":"artis-stainless-steel-dryer-wall-cap","name":"Artis stainless-steel dryer wall cap with damper","url":"/materials/artis-stainless-steel-dryer-wall-cap/","categories":["vents"],"complianceStatus":"attribute-match","documentedAttributes":[{"attribute":"assemblyRole","value":"dryer-vent","source":{"title":"Artis wall vent caps","url":"https://www.artiscaps.com/materials/wall-vent-caps/","publisher":"Artis Metals 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damper","url":"https://www.famcomfg.com/product/galvanized-wall-vent-with-damper/","publisher":"FAMCO","accessedOn":"2026-08-24T00:00:00.000Z","sourceType":"manufacturer"},"documentLocation":null,"excerpt":null},{"attribute":"functionalClosure","value":true,"source":{"title":"FAMCO galvanized wall vent with damper","url":"https://www.famcomfg.com/product/galvanized-wall-vent-with-damper/","publisher":"FAMCO","accessedOn":"2026-08-24T00:00:00.000Z","sourceType":"manufacturer"},"documentLocation":null,"excerpt":null}]},{"id":"famco-fwv-flush-dryer-wall-vent","name":"FAMCO FWV flush dryer wall vent","url":"/materials/famco-fwv-flush-dryer-wall-vent/","categories":["vents"],"complianceStatus":"attribute-match","documentedAttributes":[{"attribute":"assemblyRole","value":"dryer-vent","source":{"title":"FAMCO flush wall vent with gasket and damper","url":"https://www.famcomfg.com/product/flush-wall-vent-w-gasket-damper-no-screen/","publisher":"FAMCO","accessedOn":"2026-08-24T00:00:00.000Z","sourceType":"manufacturer"},"documentLocation":null,"excerpt":null},{"attribute":"functionalClosure","value":true,"source":{"title":"FAMCO flush wall vent with gasket and damper","url":"https://www.famcomfg.com/product/flush-wall-vent-w-gasket-damper-no-screen/","publisher":"FAMCO","accessedOn":"2026-08-24T00:00:00.000Z","sourceType":"manufacturer"},"documentLocation":null,"excerpt":null}]},{"id":"imperial-vt0497-a-wall-exhaust-cap","name":"Imperial VT0497-A wall exhaust cap","url":"/materials/imperial-vt0497-a-wall-exhaust-cap/","categories":["vents"],"complianceStatus":"attribute-match","documentedAttributes":[{"attribute":"assemblyRole","value":"dryer-vent","source":{"title":"Imperial R2 wall exhaust cap","url":"https://www.imperialgroup.ca/product/venting-flexible-duct/dryer-venting/caps/r2-style-wall-exhaust-cap-4/","publisher":"Imperial Manufacturing Group","accessedOn":"2026-08-24T00:00:00.000Z","sourceType":"manufacturer"},"documentLocation":null,"excerpt":null},{"attribute":"functionalClosure","value":true,"source":{"title":"Imperial R2 wall exhaust cap","url":"https://www.imperialgroup.ca/product/venting-flexible-duct/dryer-venting/caps/r2-style-wall-exhaust-cap-4/","publisher":"Imperial Manufacturing Group","accessedOn":"2026-08-24T00:00:00.000Z","sourceType":"manufacturer"},"documentLocation":null,"excerpt":null}]},{"id":"ips-snapcap-exhaust-vent","name":"IPS SnapCap exhaust vent","url":"/materials/ips-snapcap-exhaust-vent/","categories":["vents"],"complianceStatus":"attribute-match","documentedAttributes":[{"attribute":"assemblyRole","value":"dryer-vent","source":{"title":"IPS Roofing Products 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vent","url":"https://seiho.com/model_sfbp.html","publisher":"Seiho International","accessedOn":"2026-08-24T00:00:00.000Z","sourceType":"manufacturer"},"documentLocation":null,"excerpt":null}]},{"id":"vent-works-dryer-wall-vent","name":"Vent Works dryer wall vent","url":"/materials/vent-works-dryer-wall-vent/","categories":["vents"],"complianceStatus":"attribute-match","documentedAttributes":[{"attribute":"assemblyRole","value":"dryer-vent","source":{"title":"Vent Works dryer wall vent specifications","url":"https://vent-works.com/materials/dryer-wall-vent","publisher":"Vent Works","accessedOn":"2026-08-24T00:00:00.000Z","sourceType":"manufacturer"},"documentLocation":null,"excerpt":null},{"attribute":"functionalClosure","value":true,"source":{"title":"Vent Works dryer wall vent specifications","url":"https://vent-works.com/materials/dryer-wall-vent","publisher":"Vent Works","accessedOn":"2026-08-24T00:00:00.000Z","sourceType":"manufacturer"},"documentLocation":null,"excerpt":null}]}],"matchContract":"Products appear only when their cited fields satisfy this requirement's normalized constraints. Application scope and unresolved predicates remain separate; an attribute match is not a permit decision."}