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Why IR Spot Heat > IR Basics |
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Infrared Heating Basics Heating people, not air. Human thermal comfort is a function of ambient air temperature and humidity, the cooling effect of air movement and the amount of infrared, or radiant, energy shining on and being absorbed by your skin and clothes.
When the sun emerges from behind a cloud, you
immediately feel warmer due to the increase in radiant energy received from
the sun, although there is little or no change in the surrounding ambient
air temperature. This is because radiant energy, which travels at the speed
of light, elevates the temperature of solid objects when it is absorbed, but
does not heat the air through which it travels.
Humans at rest tend to be comfortable at around 70°F or 22°C. When the temperature drops, we put on more clothes, get more active or turn up the heat. Turning up the heat often means heating the air that surrounds us with some sort of central or in-space (local) convective heater. Air passing or being forced over a warm element or a pipe filled with warm water or hot combustion products absorbs the element's heat and becomes warmer. Turning up the heat can also mean increasing the amount of radiant energy shining on you and the objects around you. There is a broad range of surface radiant heaters (floor, ceiling and wall; electric, hot water and gas) and reflector focused radiant heaters (low intensity (temperature) tube gas heaters and high intensity (temperature) gas and electric heaters.) In many situations radiant, in-space (local) heaters are dramatically more energy efficient than any other heating choice. The energy efficiency stems from several factors:
In situations where there is poor or no insulation (factories, warehouses, outside) and high air exchange (factories, warehouses, stores, outside) the heat losses are huge, and therefore so are the savings with radiant heat. For more information on HotZone™ heaters and their application, please visit the Applications, Products and Reference sections of this website. |
Applications |
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Schaefer Ventilation Equipment |
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©2008 Schaefer Ventilation Equipment Inc., all rights reserved. 11/20/08