What type of fan control uses an electric heater to operate the blower motor?

The correct answer involves control systems designed to optimize the operation of the blower motor through specific sequences. Timed Delay Control functions by using an electric heater to maintain the temperature within a space for a predetermined amount of time after the heating element or system has turned off. This ensures that residual heat is effectively used, allowing the blower motor to continue running for a while to circulate warm air in the room.

In this context, the operation of the motor is linked to the heating cycles. When the heater activates, it heats the air, and after the heater shuts off, the timed delay allows the blower to keep running for a while to distribute the remaining heat. This maximizes efficiency and comfort.

The other options consist of different control mechanisms. Temperature Control typically turns the blower on or off based on the temperature setting, while Variable Speed Control adjusts the blower's speed based on system demand or temperature changes. Bimetal Control uses a bi-metallic strip that reacts to temperature variations to operate the fan, but does not function through a timed delay mechanism. Understanding these distinctions clarifies how timed delay control effectively manages blower operation to maintain optimal heating conditions.