How is a check damper controlled in response to thermostat settings?

• A. By manual adjustment only
• B. Automatically, based on temperature
• C. Through a remote control
• D. By the heating system's pressure

Answer: (B)

A check damper is designed to regulate airflow within a ventilation system in response to temperature changes, primarily based on the settings of a thermostat. When the thermostat senses a temperature change that requires heating or cooling adjustments, it sends a signal to the damper to open or close accordingly. This automatic response ensures that the conditioned air reaches the desired areas of a building efficiently.

This type of control is essential for maintaining optimal indoor climate conditions without the need for manual intervention, which can be cumbersome and inefficient. By allowing the system to react automatically, energy consumption can be managed effectively, enhancing overall comfort and efficiency in the HVAC system. Thus, the option reflecting automatic control in response to thermostat settings accurately describes the function of a check damper.