What type of vent pipe is required for an LP Gas wall furnace with a capacity in excess of 50,000 BTU?

For an LP Gas wall furnace with a capacity in excess of 50,000 BTU, a Type BW vent pipe is the correct choice. Type BW vent piping is designed specifically for venting appliances that burn gas, which include wall furnaces, and is suitable for Category I appliances that are non-condensing. It is constructed to handle the temperatures and pressures associated with gas combustion, ensuring safe venting of exhaust gases.

Type BW vent pipes are typically made of sturdy materials that can withstand high temperatures and are designed to prevent the transmission of harmful gases back into living spaces. They also help in directing the exhaust safely outside the structure, which is crucial for maintaining indoor air quality and safety when using gas appliances.

Type A vent pipes, on the other hand, are typically used for appliances that generate draft naturally and can handle varying venting pressures. Type B vent is for appliances that operate with induced draft, while Type C vent pipes are intended for use with appliances that are categorized as having direct vent configurations, which are not applicable to standard wall furnaces.

Choosing the correct type of vent pipe is essential for both safety and performance in gas appliance installations.