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Heater Types

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Three basic types of heaters are convection, radiant, and forced air. The following descriptions aid in determining the heating method that will provide the best solution for any given situation.

Convection Heaters
Convection heat is the transfer of heat from the heater to the surrounding air by the natural circulation of air through the heater. This air motion is a result of gravitational forces where the heated air is lighter than the cooler air. Heated air rises from the top of the heater and is replaced by cooler air that enters from the bottom. Individual convection heaters are a common heat source for smaller enclosed areas and multiple units can be combined to heat larger areas..

Radiant (Infrared) Heaters
Raidant Heaters

Similar to the sun, radiant (or infrared) heaters heat people and objects rather than air or space. Radiant heat is less affected by drafts and large air movements—it passes through the air to heat floors, walls, machinery and people. This makes radiant heaters ideal for outdoor and high ceiling heating applications. They are also ideal for spot heating cold areas like shipping docks; for protecting valves, pumps, and machinery from freezing; and thawing frozen pipes. Radiant heaters generate no noise, fumes or flames.

Forced Air Heaters
Adding a fan or blower to a convection heater creates artificial air movement, which quickly removes heat from the heater surface. Forced air heaters can circulate heated air over very long distances and are usually the choice for heating larger areas.

Direct Fired Heater
Direct-Fired Heaters are ideal for applications where lots of heat is required in non-enclosed areas such as general construction, ventilated warehouses, and parking garages. They are highly efficient since all the heat is transferred to the heated airflow. Direct-Fired heaters are also both compact and economical due to their simple design.

Indirect-Fired Heaters utilize a heat exchanger that keeps fumes and exhaust products out of the airflow providing clean, dry, odorless heat. A flue vents excess moisture, carbon monoxide, and other products of combustion. Indirect-Fired heaters can also accommodate ductwork, which allows distribution of clean heated air to specific target areas. This feature also allows placing the unit outside and in a remote location from the area being heated. Applications include general construction in enclosed areas, special event tents, concrete curing, industrial painting, wrapped scaffold projects, pipelines and hazardous areas, and moisture control/drying.

Indirect-Fired Heater

Electric Heater

Electric Heaters provide clean, dry heat with none of the combustion by-products common to fossil fuel burning units. They are also very quiet and require almost no routine maintenance. Applications for electric forced-air heaters include general construction in enclosed areas, temporary commercial heating, special event tents, and moisture control/drying.

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