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The calculated operating conditions for a fan excluding tolerances.

Related Terms

BLAST FREEZER

Low-temperature evaporator which uses a fan to force air rapidly over the evaporator surface.

EVAPORATOR FAN

Fan which increases airflow over the heat exchange surface of evaporators.

UNITARY SYSTEM

A room unit which performs part or all of the air conditioning functions. It may or may not be used with a central fan system.

FAN PERFORMANCE

A measure of fan operation in terms of volume, total pressures, static pressures, speed, power input, and mechanical and static efficiency, at a stated air density.

FORCED-DRAFT FAN

A fan supplying air under pressure to the fuel burning equipment.

INDUCED DRAFT FAN

A fan exhausting hot gases from heat absorbing equipment.

FAN

A machine consisting of a rotor and housing for moving air or gases at relatively low-pressure differentials.

VANE CONTROL

A set of movable vanes in the inlet of a fan to provide regulation of airflow.

VOLUME OF AIR

The number of cubic feet of air per minute expressed at fan outlet conditions.

POSTPURGE

A period after the fuel valves close during which the burner motor or fan continues to run, to supply air to the combustion chamber.
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