INSTALLATION : EXHAUST FLUE INSTALLATION
INTERNAL VERTICAL FLUE
Installation will require the use of double-wall UL-103 HT (US) or ULC-S629 (Canada) Class A 2100°F stainless steel flue components to pass through the ceiling, attic and roof. Connect and seal all flue connections as indicated at the beginning of this section. VERTICAL FLUE - HEIGHT ABOVE NEARBY BUILDING COMPONENTS The vertical flue must extend to a height not less than 2’ above any building component within a 10’ radius of the flue. If the vertical portion of the flue penetrates the roof overhang, a DuraTech Firestop radiation shield and adjustable roof flashing are required. The vertical flue must extend at least 3’ above the roof surface where it penetrates the roof. DO NOT INSTALL A FLUE MANUFCTURER’S FLUE CAP as it will unduly restrict the flow of pressurized exhaust gases. Use only the GARN ® manufactured rain cap, Part #P-0102 available at www.garnparts.com. Check with your local building inspector about any additional height restrictions. DO NOT USE A VERTICAL FLUE IF THE BUILDING HAS A COMBUSTIBLE ROOFING MATERIALS OR IF TREE BRANCHES ARE ABOVE THE FLUE. CONNECTION TO A MASONRY CHIMNEY Only under limited circumstances may a GARN® be connected to a masonry chimney. Masonry chimneys are designed for heating devices that burn continuously in cold weather. Because the GARN® is only burned periodically, the masonry chimney must have a continuous, insulated minimum 6” diameter stainless steel liner. It must be surrounded with fireproof insulation and it must be no taller than 24’. The maximum total static pressure loss in the vertical portion of the existing flue must not exceed 0.10” of water column at a flow rate of 375 CFM.
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GARN® WHS 1000 and WHS 2000 Manual | © HY-C® Company LLC | October 2024
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