4000000kcalh Clove Stem Used Boiler
Combustion-Air Intake: Boilers shall be capable of drawing combustion air from the outdoors via a metal or PVC duct connected between the boiler and the outdoors. The minimum ducted combustion air duct size for each boiler is six inch (BMK750 - 1500), 8 inch (BMK2000 - 3000), 10 inch (BMK4000-5000N) diameter or 12 inch (BMK5000 and 6000) diameter.
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