If you are installing a new heater in a room and you are wondering about electric heater calculations, there is fortunately a simple formula you can use that should help you determine this. The first thing to do is to calculate the size of the room that you are hoping to heat. This is usually a fairly easy procedure, and simply involves measuring the length of your walls and multiplying to find the square footage area.
There are a few other things that can affect your wattage heater calculator results. For instance, if the room has particularly high ceilings you should add on an additional 25 percent for every two feet of height over eight feet that your walls are.
When it comes to actually figuring out the calculation, a modern home that is properly insulated will use approximately ten watts of heat per square foot. This can go as high as 15 watts per square foot for an older, poorly insulated home. Homes that have some insulation would vary inbetween, say at 12 watts per square foot. While this is a bit subjective, if you have been living in a house for any time you should have a fair idea of how energy saving the room is, and how well it is insulated.
Rooms with wall to floor windows, or glass doors that lead onto a patio need even more wattage to warm. For a conservatory, or a room with a lot of windows, you should increase the calculated wattage up by 25 percent, to allow for the extra drafts and heat that escapes through glass windows.
Another key element to heating up especially large rooms is to invest in two smaller wattage heaters rather than one big electric heater. For example, if you calculate that your room will need a 2000 watt heater, you would probably more efficiently heat that room if you invested in two 1000 watt heaters instead and installed them at opposite ends of the room. This will heat up the room much more evenly, and it will turn out to be much more energy saving as the heaters will be more regulated and will both most likely run at a lower temperature. If you only install one big heater, you may find that it is running all the time, trying to heat up the far side of the room.
While there is a bit of guess work, or at least estimation involved in deciding how large your electric heating unit should be, if you follow these simple instructions you should be able to come up with a fairly accurate estimate.
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