A heater that has a set of heat-transfer coils through which air is forced by a fan operating at a relatively high velocity.



Related Terms

AIR BLASTING

A blasting technique in which air at very high pressure is piped to a steel shell in a shot hole and discharged. Also known as air breaking.

CHECKERBOARD REGENERATOR

An open checker work arrangement of firebrick in a high temperature chamber that absorbs heat during a batch processing cycle, then releases it to preheat fresh combustion air during the down cycle; used, for example, in the steel industry with open-hearth and heat-treating furnaces.

FORCED-DRAFT FAN

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

SPRAY-COIL UNIT

A cooling circuit that sprays water over cooling coils through inflowing air to humidify or dehumidify that air, as required.

FIXED INDUCTOR

An inductor whose coils are wound in such a manner that the turns remain fixed in position with respect to each other, and which either has no magnetic core or has a core whose air gap and position within the coil are fixed.

POLAR MARITIME AIR

An air mass that originates in the polar regions and is then modified by passing over a relatively warm ocean surface. It is characterized by moderately low temperature, moderately high surface specific humidity, and a considerable degree of vertical instability. When the air is colder than the sea surface, it is further characterized by gusts and squalls, showery precipitation, variable sky, and good visibility between showers.

VANE CONTROL

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

FORCED-AIR HEATING

A warm-air heating system in which positive air circulation is provided by means of a fan or a blower.

MAGNETO

An electro-mechanical device that produces high tension from revolving coils in the field of a powerful magnet, used to power the spark plugs in a simple petrol internal combustion engine.

CONVECTION OVEN

An oven containing a fan that continuously circulates hot air around the food being prepared.

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