Compared to Water Filled Space HeatersHowever, the main reason oil filled heaters are so energy efficient is due to the unique thermal properties of the oil. Diathermic oil has a high specific heat capacity, which is the amount of energy a substance can absorb before its temperature rises one degree. A high heat capacity allows the oil can absorb and retain a very large amount of heat. Its a heat reservoir that allows the unit to keep radiating heat even after the resistor has been deactivated. This means that once the room has reached your desired temperature, a NewAir oil filled space heater [https://qualityhomeaircare.com/do-space-heaters-use-a-lot-of-electricity/|requires less power] in order to maintain it