The term heat loss refers to ____.

Which of the following statements about charge compensator tanks is false?

With no excess air dilution, the ultimate carbon dioxide content for natural gas is approximately ____.

Which of the following statements about heat pump compressors is false?

Electric furnaces can be installed as ____ furnaces.

A furnace with an AFUE range of approximately 79% to 83% is a ____ gas furnace.

A reversing valve that uses a solenoid valve to direct high- and low-pressure refrigerant to move the sliding section within the valve body is a ____.

In some furnaces, an opening in the flue, called a(n) ____, helps keep constant pressure in the combustion chamber and prevents ambient air from reaching the furnace flame.

A humidifier that sprays small water droplets into the air is called a(n) ____ humidifier.

A typical forced-air furnace is equipped with a(n) ____.