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- ItemVent Kit
- For Use WithTop Vent Counterflow Furnaces
- Includes(2) 24" Section of Oval B Vent, Base Plate, (2) Ceiling Straps and 4" Oval to Round Adapter
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B gas vent is that its outer wall, insulated by the
airspace beneath it, requires only 1" clearance to
combustible material in the structure". There is a firestop spacer manufacturers part number 40FS that may be ordered from the manufacturer to mount between the 2x4 studs.
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