System for increasing heating efficiency
OwnerNestor P. Ardienteinventor
Life of this patent
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Abstract
A conventional forced air furnace is provided with a source of outside air for use in combustion. The amount of outside air admitted to the furnace and the amount of heated air lost through the chimney are regulated by simultaneously operable dampers synchronized with the operation of the furnace. Alternate power circuits and an alarm system for the dampers are provided.
Claims3
A system for increasing the efficiency of a thermostat controlled forced-air type of furnace having an exhaust duct, a hot air duct, and a cool air return duct, comprising:
- means for providing the furnace with outside air for combustion;
- movable dampers for regulating the air flow from the outside and through said exhaust duct;
- a rotatable shaft fixed to said dampers;
- a solenoid connected to said shaft and capable of rotating it when the solenoid is energized;
- a first electrical power circuit activated directly by the thermostat for energizing the solenoid;
- a second electrical power circuit activated when the furnace blower operates for energizing the solenoid if the first power circuit fails to do so;
- and means for manually rotating said shaft independently of the first and second power circuits, whereby said dampers are positioned by said shaft to obstruct air flow when the furnace is not operating and positioned to permit air flow when the furnace is operating.
A system for increasing the efficiency of a thermostat controlled, forced-air type of furnace having an exhaust duct, a hot air duct, and a cool air duct comprising:
- (a) a duct providing the furnace with outside air for combustion;
- (b) rotatable dampers located in the outside air duct and the exhaust duct;
- (c) rotation means for simultaneously positioning both dampers to block air flow when the furnace is not operating and to permit unobstructed air flow when the furnace is operating;
- (d) a first electrical power circuit activated by said thermostat and connected with said rotation means to rotate said dampers to the appropriate position;
- (e) an alternate electrical power circuit activated by said furnace and connected with said rotation means to rotate said dampers to the appropriate position in the event the first electrical power circuit fails to rotate said dampers;
- and
- (f) a manually operated handle connected to said rotation means to override said electrical power circuits and permit manual positioning of the dampers.
Dependencies are inferred from the claim text.