Domestic heat recuperation system from warm ceiling air - uses temp. sensor near floor of room to switch fan which draws warm air from ceiling, down duct and to floor

摘要

The warm air which rises to the ceiling of a room is recirculated back to floor level to maintain a more even temp. distribution in a room and to reduce the energy required to heat the room. A vertical duct with vents at the top and bottom is placed so the vents have access to the air space of a room. A temp. sensor near the floor is used to activate an electronic circuit which switches the electric supply to a motor which has a fan coupled to its shaft. When the floor temp. falls the fan is switched on and draws air from the ceiling down the duct to be exhausted near the floor. When the floor temp. rises the fan is switched off.