What Size Heater Do I Need?
The amount of heat you will need depends on the size of your room and where you live. People in Southern California will not need as much heat to warm the same amount of space as the ones living in New York.
Most Electric Heaters are sold in Wattage which is how much power the unit consumes and not how much heat it is producing.
Fun fact: Heat is measured in BTU (British Thermal Unit.) 1 BTU is the energy needed to heat or cool one pound of water by 1 degree Fahrenheit.
On average, you can use 10 watts per square foot (sf) as your constant to calculate the proper wattage needed for your room.
If your room is 10-ft X 15-ft, then you will need 10-ft X 15-ft X 10-W/sf = 1500 watts.
Fun fact: If you have a high ceiling, you don’t need to add more wattage. Use a ceiling fan to move the warm air back down. With proper air circulating, you will be able to properly heat your room more efficiently.
If your room has lots of windows or you live in a colder area (i.e. Boston,) then go up to the next heater. While if you live in a warmer region (i.e. Florida,) go down one level.
Keep in mind that because a 5000-Watt heater is the same price as a 1600-Watt version, does not mean that you are getting a better deal.
Having the correct heat settings for the size of your room ensures proper operation. Most modern heaters have overheat protection built-in which automatically shuts the heater off in the event it is too hot. Over-sized heaters will constantly shut off and will eventually quit working.
Under-sized heaters will constantly run while your room remains cold. The unit will eventually burn out and stop working.