 It is very important for each house to have a heater and what kind it will be depends on you. There are many kinds of them. Your task is to decide which one you want to buy. So, if you have decided to buy an electric heater, then you have to think about its size.
As for electric heaters, they come in a range of sizes measured in how much energy they consume and heat they put out, and are rated in Watts.
In order to size an electrical heater for a room, you should first understand that the size will be affected by heat loss through the walls and windows in the room. This is very important as it depends on insulation. In this way, the amount of insulation and quality and number of windows will have an affect on the heater size.
Nevertheless, as a rough rule of thumb, assume the heater to be sized at 10 watts per square foot of room being heated. Measure the length of the room and the width of the room. Then you should multiply the length times the width and then multiply that by 10. Be sure, this will give you the rough wattage for the heater. But your room may be poorly insulated or has a lot of windows. In this way, select a slightly larger unit.
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