Question

Vent terminals in locations having minimum design temperature below 0 degrees F shall be a minimum of _______?

1) 1 inch
2) 2 inches
3) 3 inches
4) 4 inches

Answer 1

Vent terminals in locations having minimum design temperature below 0 degrees F shall be a minimum of 3 inches.

Step-by-step explanation:

Vent terminals in locations having minimum design temperature below 0 degrees F shall be a minimum of 3 inches.

When the temperature drops below freezing, the moisture in the air can condense inside the vent pipe. This can lead to blockages and backflow, which can be problematic for the system. By using a larger vent terminal size, it allows for better airflow and minimizes the risk of blockages.

For example, in areas where the temperature can drop significantly during the winter, such as Alaska, a larger vent terminal size would be required to account for the extreme cold temperatures.