missing region the outside air temperature ta is high and the indoor temperature tr is low and consequently the indoor temperature tr can be increased by taking in the outside air as is without performing heating operation accordingly energy consumption can be reduced by permitting heating operation in such a temperature region the text below separately explains referencing fig7 the electromagnetic induction heating unit operation permitted condition for two cases at heating operation startup or during defrosting operation and during regular heating operation operation permitted condition at heating operation startup or during defrosting operation at heating operation startup or during defrosting operation the control unit 11 permits the operation of the electromagnetic induction heating unit 6 if the range of the outside air temperature ta is ta lt 8 u00b0 c refer to the broken line in fig7 the range of the indoor temperature tr is tr lt 21 u00b0 c refer to the broken line in fig7 a temperature difference u03b4trs calculated by subtracting the indoor temperature tr detected by the indoor temperature sensor t 42 from the indoor set temperature tse which serves as the indoor space target set temperature set by an inputting unit not shown such as a remote control exceeds 1k.