Type BH vent is made of which material?

Type BH vent is specifically designed for venting gas appliances and is constructed using 636 stainless steel, which is a high-quality material suitable for high-temperature applications. This type of stainless steel provides resistance to corrosion and has excellent structural integrity, making it ideal for use in environments where flue gases are present.

Additionally, 636 stainless steel is known for its ability to withstand the heat and potential acidic conditions arising from combustion products. The proper selection of materials for venting systems is crucial in ensuring safety, efficiency, and compliance with building codes, as these materials must endure the specific demands of the exhaust gases produced by gas appliances.

Other materials mentioned, such as double-walled aluminum, galvanized iron, and copper, do not meet the specific requirements that stainless steel does for Type BH vents, particularly regarding durability and resistance to corrosion from flue gases. Each of these materials has its own application strengths but is not appropriate for the Type BH vent classification in this context.