The comfort zone is defined as temperatures between 68°F and 78°F with relative humidity between 30 and _____ percent.

Poor ventilation may exist in a building when the concentration of carbon dioxide (CO2) in the building exceeds _____ ppm.

The type of heat transfer that takes place by the movement of air from one place to another is called _____.

In automated HVAC systems, stationary carbon monoxide (CO) detectors are normally installed _____.

Low relative humidity can cause _____.

Ultraviolet light-generating equipment can be used in HVAC air distribution systems to _____.

Cold air that is heated has no change in its specific humidity, but the relative humidity will be _____.

An optional item of equipment that can be used to increase the efficiency of an air conditioning system's condenser is a(n) _____.

In humid conditions, you would remove moisture from the air by using a(n) _____.

Energy recovery ventilators are typically installed in all of the following locations, except _____.

The infrared humidifier consists of a horizontal water reservoir and infrared lamps with _____.

When a system with an economizer is operating in the heating mode, the outdoor air damper will be _____.

Conventional disposable filters do a good job of protecting the furnace and air distribution system from accumulating dust and _____.

An optional item of equipment used to recover about 60 to 80 percent of the energy contained in the air exiting a system and to deliver the energy to the incoming air is a(n) _____.

The high-voltage power supply in an electronic air cleaner is connected to the ionizer section and the _____ section.