Furnace Btu For 1000 Square Feet

2 000 square feet x 40 btus 80 000 btu output required thanks to the equation we know we need 80 000 btus of heat.

Furnace btu for 1000 square feet.

For example if a furnace is rated at 100 000 btus and is 80 efficient then the heat output will be 80 000 btus 100 000 x 8. 3 5 to 4 ton. Furnaces are rated on their btus of energy consumption not their btus of energy output. 2 5 to 3 ton.

3 to 3 5 ton. A more efficient furnace will output more btus of heat than a less efficient furnace with the same btu rating. But your hvac dealer only has air conditioners that handle 24 000 or 30 000 btus. To learn how to adjust btu per square foot for special conditions scroll down.

90 000 to 100 000 btu hr. 1 btu 1 055 joules 252 calories 0 293 watt hour or the energy released by burning one match. 80 000 to 90 000 btu hr. And in cold climates multiply the square foot number by 30 40.

For example the manual j calculation may say you need 25 000 btus for cooling. The british thermal unit or btu is an energy unit. Having a little extra power isn t bad. For example if you re trying to heat or cool 1 000 square feet you would multiply 1 000 by 20 and get 20 000 btus per hour.

Another quick and easy way to estimate the number of btu s required is with this helpful chart. But there are also rule of thumb estimations you can use to pick a furnace size for your home. 1 watt is approximately 3 412 btu per hour. A standard that is used by heating and cooling equipment companies is to provide at least 25 to 30 btu of heat per square feet in the home for a moderate to warm climate.

It is approximately the energy needed to heat one pound of water by 1 degree fahrenheit. 2500 to 3500 sq ft. But before we buy an 80 000 btu furnace there s furnace efficiency to consider as well. Up to 2 5 ton.

If your btu requirement is between sizes simply go with the bigger unit. The above square footages do not include the area of the basement.