Btu charts furnace output and air conditioner size for a bungalow bungalow area sq ft furnace output btu hr air conditioner size ton built after year 1980 built before year 1980 built after year 1980 built before year 1980 up to readmore.
80000 btu furnace how many square feet.
It may be worth considering a more efficient furnace as less energy will be used to.
And in cold climates multiply the square foot number by 30 40.
For example if you re trying to heat 1000 square feet in a cold climate 30 000 40 000 btu s will add significant warm air to your home.
80 000 btus british thermal units should heat up 3 500 square feet.
Consult an hvac expert for.
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.
For this example using an 80 efficient furnace the 1900 square foot home above would require a 90 000 btu input furnace that produces 72 000 btu s of heating which is close enough to the 76 000 btu s required using the climate heating factor.
Another quick and easy way to estimate the number of btu s required is with this helpful chart.
However if a furnace is rated at 100 000 btus and is 92 efficient then the heat output will be 92 000 btus 100 000 x 92.