Technical Standards and Safety Authority (TSSA) G3 Practice Exam

A recessed wall furnace may use which of the following?

1. No vent

2. "BW" vent

3. Single wall

4. "B" vent

The correct answer is: "BW" vent

A recessed wall furnace is designed to provide efficient heating while being safely installed within a wall. The use of venting is crucial for the safe operation of these furnaces, as it allows for the proper expulsion of combustion gases and protects against negative pressure situations that could lead to the backdraft of gases. When considering the ventilation of a recessed wall furnace, "BW" venting is specifically designed to accommodate the unique requirements of such appliances. The "BW" vent, also known as a Type B vent, is a double-wall venting system that is intended for gas appliances and provides adequate protection against the high temperatures associated with the venting of combustion by-products. This type of venting ensures safe operation by allowing for effective dispersal of exhaust gases while maintaining safety and efficiency. Other options such as "No vent" would not be safe, as proper ventilation is essential for the function and safety of gas appliances. Single wall venting may not provide the necessary safety features or thermal protection needed for the high-efficiency needs of a recessed wall furnace. "B" vent can also refer to a different configuration that may not align specifically with the requirements of recessed installations, making "BW" vent the most appropriate choice for this application. Hence, the