And in cold climates multiply the square foot number by 30 40.
60000 btu furnace heats how many square feet.
One therm is equal to 100 000 btu or 0 10 mmbtu while 100 cubic feet of natural gas equals 103 700 btu or 1 037 therms.
You might want to plan to invest in upgrading the insulation putting in new windows and weatherstripping around the doors.
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.
At 40 to 45 btus per square foot you d need a 100 000 to 112 500 btu furnace to heat your 2 500 square foot home.
Furnaces are rated on their btus of energy consumption not their btus of energy output.
Another quick and easy way to estimate the number of btu s required is with this helpful chart.
1900 square feet x 40 heating factor from the chart above 76 000 btu required to heat your home.
Your heating bills will probably be sky high though.
If you live in either of these cities you will need a heater that produces 45 to 50 btus per square foot.
Its heating factor is 50 to 60 btus.
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.
For example chicago and new york are both in zone 4 which has a heating factor of 45 to 50.
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.
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.
With a less efficient furnace operating at 80 percent efficiency this would require a.
A furnace putting out 60 000 btu s per hour will probably handle the heating load even though your house is most likely uninsulated and in a very cold climate.
A mid sized home of 2 000 square feet would need approximately 50 000 to 60 000 btu to heat it properly.
A more efficient furnace will output more btus of heat than a less efficient furnace with the same btu rating.