What causes noisy B-vent?
Often, noise in Type B gas vent is caused by the relative movement of parts in the system with adjacent parts, with part of the structure, or because of additions or changes to the parts and/or system. If installed according to Hart & Cooley’s installation instructions, the Type B gas vent is designed to accommodate the expansion and contraction due to heating and cooling which occurs within the system. Some common causes of noise in a system could be: screws used in the assembly of the gas vent system; contact with any part of the structure; roof flashing attached to the vent pipe; any means of support other than the listed Hart & Cooley support assembly.
