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This is a Criminal Justice class.

Which of the following is not a type of evaporative humidifier?

Electric furnaces can be installed as ____ furnaces.

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

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.

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

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

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

Which type of furnace takes in return air from the top and forces it out near the bottom?

A(n) ____ can open and close a gas valve, control a spark or hot-surface igniter, and monitor interlocks.