Simon Adams

NFPA 54: 9.3.3.1 vs 9.3.3.2

Discussion created by Simon Adams on Mar 26, 2018
Latest reply on Mar 27, 2018 by Simon Adams

Does anyone know why would a 2 openings method described in 9.3.3.1 be used for a gas appliance over, an easier and smaller, single opening method described in 9.3.3.2? The latter allows 1sqin/3,000BTU while the former 1sqin/2000BTU for horizontal duct. Thank you.

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