Air heating system

Details Air heating system Air heating system

F - Mech Eng,Light,Heat,Weapons

24

H

F24H 3/04 (2006.01) F24F 13/02 (2006.01) F24H 9/20 (2006.01)

Patent

CA 2242829

An air heating system includes a duct containing an electric heating coil and a thermistor which is part of an electronic thermostat for controlling the heating coil. The thermistor is so located as to be directly exposed to heat radiated by the heating coil. The thermistor, in effect, acts as an airflow sensor so that the heating coil will gradually cool down and eventually shut off according to the air velocity in the duct. Heating is restored automatically once airflow in the duct has sufficiently cooled down the thermistor. Thus, the thermistor acts as an airflow sensor to modulate the heating capacity according to the quantity of air flowing through the duct. The heating system can be used in a fresh air intake for a central air furnace or for a heat pump, for baseboard heating with a duct and fan or as a unit incorporated into a larger forced air heating system.

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