| 摘要 |
Heating of a house and the like is performed by sensing a need for heat by a thermostat; supplying fuel into a furnace in response to a signal from the thermostat and burning the fuel in the furnace; directing the burning fuel to heat exchanging means so as to heat the heat exchanging means; blowing cool air by a fan past the heat exchanging means so as to heat the air; directing the heated air through heat ducts; operating the fan so that it always runs prior, during and after supplying the fuel into the furnace for burning; and means for controlling the burning of fuel electronically so as to limit a burning cycle to only substantially a few minutes with timed harvest cycles between the burning cycles during which harvest cycles the air is blown by the fan over the hot heat exchanging means and distributed through the heat ducts.
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