NFPA 54: vs

Discussion created by simonny on Mar 26, 2018
Latest reply on Mar 27, 2018 by simonny

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