The cheapest heater to run is the Ceramic Portable Energy Efficient Heater. This heater is cheap to run because the heating system uses 600W and 1000W heating modes, helping you save energy and electricity bills.It has an adjustable thermostat, the heating speed is faster, no flames, no oxygen consumption and it is safe. Compared to traditional heaters, thus the ceramic heart is a very quiet, low noise of <45decibel.Great value for money, easy to use, suitable for home, office, bedroom, and indoors.