<；P>；PROBLEM TO BE SOLVED: To solve a problem wherein conventionally, inventions intended to improve energy saving and avoid frost formation (secure continuous heating operation) etc. by incorporating a heat pump and a combustor to selectively use them are found, while these do not go beyond the concept and have a problem of effectiveness. <；P>；SOLUTION: In this heating control method in a house, during operation of a heat pump, a sensor detects outside air temperature. When the sensor detects temperature below predetermined temperature and/or detects the possibility of frost formation on an outdoor unit of the heat pump, a heater is operated. The outside air is converted to warm air by heat exchange between exhaust heat exhausted to a smokestack and the outside air. The warm air is blown to the outdoor unit to prevent frost formation, and through the continuous operation of heat pump, efficiency of fuel is improved, and CO2 is reduced. While the continuous operation of the heat pump is assisted, the room temperature in the house is maintained at predetermined temperature. <；P>；COPYRIGHT: (C)2010,JPO&INPIT
