![]() Excess air requirements for the forced draft burners should be calculated at 14 cu. Other factors can cause the draft to strongly work against the burner. Even though a burner may be Forced Draft, do not assume it can draw the air it requires. Negative air pressure at the burner air intake can create poor firing. Free area – louvered – shall be considered Metal at 75 percent and Wood at 25 percent.If unobstructed area, then no storage, free circulation of air. ![]() inch per 4,000 Btu/H input – via vertical ducting or through the wall. inch per 2,000 Btu/H input – via horizontal ducting. inch per 4,000 Btu/H input – direct to outdoors. The minimum dimension for air opening shall not be less than the following: The openings shall communicate directly outdoors or by ducts. Two openings are required, one near the floor the other near ceiling. If so, then two openings are required one near the floor and a second near the ceiling with at least 1 square inch per 1,000 BTU/H - not less than 100 square inches. Past BOCA, NFPA, and ANSI requirements have included (in part) the following: Inside AirĪssuming a rate of a least 40 cubic feet per 1,000 BTU/H, additional air is required if the exchange rate is less than 0.5. (BOCA) provides performance oriented model codes including provisions on minimum air supplies for combustion. Combustion Air Requirements for Boilersīuilding Officials and Code Administrators International, Inc. Design, installation, and operation should only be done by qualified individuals familiar with HVAC systems, burner set-up, and local code requirements. WARNING: Failure to properly design, install, and maintain boiler systems may cause excessive levels of CARBON MONOXIDE or FIRE. cannot ensure that its equipment, as ordered by the customer, meets local boiler room code. Qualified engineers and designers should be consulted prior to implementing any system. ![]() Superior Boilers can be sidewall vented as long as local and BOCA codes are met.ĭesigns of boiler room air flow and the flow of combustion products requires clear understanding of the application objectives, limitations imposed by the boiler room and other equipment, and knowledge of applicable codes.Superior Boilers are UL approved for use with Type B venting.All Superior Boiler non-condensing boilers are Category I Appliances operate with non-positive pressure (0 to -0.05″ WC pressure at the vent collar).It is Important to Keep in Mind the Following
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