STEAM BOILERS - Slantfin
2020-4-29 · B. Boiler vent pipe must be the full diameter of the boiler draft hood outlet. See dimensions, page 2. If a vent damper is added, its diameter must be equal to the hood outlet and must be located past the hood outlet. See installation instructions furnished with vent damper and in the section 'Vent Damper Installation' of this instruction book. C.
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