In the illustrated terminal reheat multiple zone system, what statement represents the functioning of the winter outside air duct thermostat? GS-RA-42 Illustration GS-RA-42: the U.S. Coast Guard has not released this illustration.

Correct Answer: Option A — During the heating season, the winter thermostat senses the outside air temperature and closes the exhaust and outside air dampers when the outside air temperature is significantly lower than typical indoor air temperatures.

During winter, the outside air thermostat monitors ambient conditions. When temperatures drop significantly below indoor setpoints, the system restricts outside air intake to minimize the heating load on the preheater. Closing exhaust and outside air dampers prevents excessive energy consumption required to heat frigid air to comfortable interior levels.