What is the highest temperature a typical gas furnace vent stack should reach?

The highest temperature that a typical gas furnace vent stack should reach is 450°F. This temperature is significant because it reflects the design and operational standards for venting systems in gas heating applications.

At 450°F, the vent stack can effectively expel combustion gases and maintain safe operation without risking damage to the venting materials or surrounding structures. Exceeding this temperature can lead to thermal stress, increased risk of condensation that can corrode the vent pipe, and potential fire hazards.

Properly managing the vent temperatures ensures that the furnace operates efficiently and safely, reflecting adherence to building codes and safety regulations. From a performance perspective, keeping the temperature in this range helps maintain optimal combustion efficiency and minimizes the risks associated with venting gas appliances.