Also, after running the heater continuously, its air also reduces. This also happens because the fan motor runs continuously. Fan motor has a capacity, if we use it more than this then there can be some problem. So whenever you use the heater, give it some rest with the help of the power button. With this, the fan motor will also always be fine and the heater will also give more hot air.
Apart from this, the Room Heater has two buttons to set the heating capacity. Whenever you use a heater, set it according to your body temperature. Whenever you feel excessively hot, set the temperature of the room accordingly. This can also cause many health related problems. So for this you have to use the other button given in the heater.