I would like to buy a heater that I can use as my main source of heat. Which model would you suggest?
Portable electric heaters are intended for supplemental heating. They are not intended to replace central heating systems.
How are heaters rated?
Heaters are rated by the amount of heat that they produce which is measured in BTU's or British Thermal Units. The average peak output of an electric heater for 1500 watts is 5120 BTUs per hour.