An automatic defrost system uses a timer or control mechanism that operates the heating mechanism during the unit’s Off cycle.

High-efficiency furnaces and boilers require a conventional Class A chimney.

A masonry chimney is a Class B chimney.

Which of the following types of defrost systems bases the frequency of the defrost cycle on the number of times the cabinet door is opened?

Natural convection in a natural-draft evaporator quickly cools the entire compartment evenly.

The face of the refrigerator cabinet achieves a good seal with the gasket by using ____.

Ice molds in many ice makers include a heater to loosen the ice when the harvest phase begins.

In households with reverse osmosis systems, the refrigerator’s fresh water inlet should be connected to the outlet of the reverse osmosis filter.

A moisture control system may use the heat produced during the compression of the system’s refrigerant to prevent condensation on the unit.

A thermistor is usually wrapped in a metal slug to moderate temperature swings.