WebClass A chimney usually has a 2-inch clearance to combustibles, and a type B gas vent normally has 1-inch clearance. Vent pipe for a direct gas fireplace is unique. It typically … WebBe sure to check the Installation & Operation manual for your fireplace as the manufacturer's specifications could differ from the gas fireplace vent opening clearances table above. Notes from the original source cited …

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WebAPPENDIX AB SIZING OF VENTING SYSTEMS SERVING APPLIANCES EQUIPPED WITH DRAFT HOODS, CATEGORY I APPLIANCES AND APPLIANCES LISTED FOR USE WITH TYPE B VENTS arrow_right APPENDIX AC EXIT TERMINALS OF MECHANICAL DRAFT AND DIRECT-VENT VENTING SYSTEMS arrow_right APPENDIX AD … WebThere are two types of Class A chimney pipe: Solid-packed chimney — These pipes have smaller inner diameters (usually ranging from 5 inches to 8 inches) that have some insulation, either double-wall (like Simpson DuraVent DuraTech pipe) or triple wall (like Simpson DuraVent DuraPlus pipe). These pipes contain fiberglass or ceramic insulation ... cth hd services

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WebA gas fireplace’s heat output, in Btus, should match your room size, climate, and your house’s insulation level. Rodica Prato Gas fireplaces have a wide range of heat output, from about 7,000 to 60,000 Btus. Use … WebFootings for masonry fireplaces and their chimneys shall be constructed of concrete or solid masonry not less than 12 inches (305 mm) thick and shall extend not less than 6 inches (152 mm) beyond the face of the fireplace or foundation wall on all sides. Footings shall be founded on natural, undisturbed earth or engineered fill below frost depth. Webtype of gas fireplace can be installed inside the house 5 Figure 2. Zero-Clearance Direct-Vent Gas Fireplace Figure 1. Gas Fireplace Insert in Existing Wood-Burning Fireplace Outside wall Sidewall vent Chimney liner Existing fireplace cavity Gas fireplace insert cth hd d u