Electric Heater Watts Square Feet

With a btu calculator a 300 square feet will require 18 800btu hour or 5 509 watts or heat for 50fahrenheit.

Electric heater watts square feet.

Average r 11 in walls and r 19 in ceiling 10 watts per square foot. So you ll need a 6 250 watt heater. For instance a room 10 by 10 feet has a floor area of 100 square feet. 1 car 12 ft ceiling.

As a general rule the watts per square foot will vary by how efficient the home or room is for retaining heat. 5 000 x 125 6250 watts. A well insulated room will require 10 watts per square foot of room. If that same room had no other source of heat you d need a 2 000 watt heater.

In other words a 1 500 watt heater will be great for a 250 square foot room with central heat. Multiply the square footage of the room by the estimated 10 watts of electric heat required to heat each square foot. Adding 10 for a window equals 1425 6 watts. Car 10 ft ceiling.

How many btu of heat do i need. Full r 19 in walls and r 38 in ceiling 7 5 watts per square foot. Determine whether you have a 120 or 240 watt circuit for your heater this will be labeled in the electrical panel to get the correct heater for your power availability. For example a 12 by 12 foot room measures 144 square feet.

Btu british thermal units is simply the amount of energy that would heat one pound of water by 1 degree fahrenheit. 1500watts 150 square feet 10 watts per square feet. For a 300 sq ft. If you ve determined that your 500 square feet room requires 5 000 watts for instance but then realize that your ceiling is 10 feet high you d need to adjust the heating requirements as follows.

Rounding up this means that 7 feet or 84 inches of heater is needed. Multiply 100 by 10 to get 1 000 watts. 144 square feet multiplied by 9 watts equals 1296 watts. Dividing by 250 the normal wattage per linear foot equals 6 84 feet of baseboard heater required.

If you re using a cadet heater for a little extra warmth in a room that s already heated by a some other form of heat you can use less wattage. 2 select your level of insulation. 1 measure the length and width of the room to determine total square footage. A less insulated space will need 12 watts and an older home with no insulation may need up to 15 watts of electrical power per square foot.

Poor little insulation older homes 12 5 watts per foot. Adding 20 for two exterior walls equals 1710 72 watts. Multiply the floor area by 10 to find the heater wattage needed for the room.