{"ai_json_enabled":true,"answer":"Dunlop's technical material refers to CRF and CHF floor-fire testing in the context of Australian NCC and BCA requirements. These ratings form part of the way flooring systems can be assessed for fire performance in buildings. The important point for a buyer is that carpet and underlay should not be considered in isolation where a project has a specified fire requirement: the relevant current test evidence for the proposed flooring system should be checked. The required result can vary with building type and use, so a current manufacturer certificate or project specification is more reliable than relying on a generic product description.","answer_source":"prospect_knowledge_airstep_dunlop","category":"Underlay, Comfort & Sound Reduction","category_slug":"underlay-comfort-sound-reduction","created_at":"2026-09-07T02:43:58+00:00","date_published":"2026-09-07","display_date":"2026-09-07","id":"drip-20260907-ec88efee","image_ids":["bcc-gen-013","bcc-real-004","bcc-real-009"],"image_url":"","last_updated":"2026-09-07T02:43:58+00:00","local_cache_status":"manual_knowledge_expansion","publish_status":"published","published":true,"published_at":"2026-09-07T02:43:58+00:00","question":"What are CRF and CHF floor fire ratings, and why can they matter when choosing carpet and underlay?","question_intent":"underlay_product_and_buying_guidance","rss_enabled":true,"rss_pub_date":"Mon, 07 Sep 2026 02:43:58 GMT","scheduled_for":"2026-09-07T02:43:58+00:00","schema_enabled":true,"site_key":"british-carpet-company","slug":"what-are-crf-and-chf-floor-fire-ratings-and-why-can-they-matter-when-choosing-carpet-and-underlay","source":"manual_underlay_knowledge_expansion","source_record_ids":[],"source_type":"manual_underlay_knowledge_expansion","source_urls":[],"status":"active","tags":["underlay","fire rating","CRF","CHF","NCC","BCA","Dunlop"],"updated_at":"2026-09-07T02:43:58+00:00"}