Pilot tube
Wet-bulb temperature
Velocity pressure
Dry-bulb temperature
Velocity
Total pressure
Psychometric chart
External static pressure (ESP)
Dew point
Static pressure
Blower door
Cubic feet per minute (cfm)
Revolutions per minute (rpm)
Relative humidity (RH)
Temperature taken that takes into account he moisture content of the air, it reflects the total heat content (sensible & latent) of the air.
The pressure exerted uniformly in all directions within a duct system, usually measured in inches of water column (in. w.c)
The number of rotations made by a spinning object over the course of one minute.
The temperature measured using a standard thermometer. It represents the measure of sensible heat present.
The speed that the air is moving. The rate of airflow is usually measured in feet per minute (fpm)
A graphic method of showing the relationship of various air properties.
The sum of the static pressure and the velocity pressure in an air duct.
A unit of measure for the volume of air flowing pas a point in one minute.
The total resistance of all objects and ductwork in the air distribution system beyond the blower assembly.
An assembly containing a fan used to depressurize a building by drawing air out, to support duct leak testing.
The temperature at which air becomes saturated with water vapor, and the water starts t condense into droplets; at state of 100% relative humidity
The pressure in a duct due to the linear movement of the air. It is the difference the total pressure and the static pressure.
The ratio of the amount of moisture present in a given sample of air to the amount it can hold at saturation. Expressed in percent.
A tool used to take pressure measurements in a moving air stream.