Question 470General Subjects - Assistant Engineer

The correct answer is 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. This is the correct functioning of the winter outside air duct thermostat in the illustrated terminal reheat multiple zone system. The purpose is to minimize the amount of cold outside air being introduced into the building, which would require more energy to heat the air to the desired indoor temperature. The other options are incorrect because they do not accurately describe the function of the winter thermostat in this system. The thermostat is designed to monitor the outside air temperature, not the indoor air temperature, and it closes the dampers to reduce cold air intake, not open them.