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

Which of the following statements regarding hot-surface ignition (HSI) systems is false?

An ignition system that burns and monitors its pilot light only while the thermostat is calling for heat is a(n) ____.

What type of furnaces are high efficiency with AFUE ratings above 90%?

Which of the following statements regarding rollout switches is true?

If the air pressure inside a building is lower than the air pressure outside the building, air will leak in. This is known as air ____.

A humidifier’s water feed should be tapped into the ____.

If the air pressure inside a building is greater than the air pressure outside the building, air will leak out. This is known as air ____.

Solar panels used in conjunction with heat pump systems ____.

A temporary pacemaker lead may be sutured to the right ventricle and right atrium for this procedure and chest tubes will be inserted at the end of this procedure.