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.
60000 btu furnace heats how many square feet.
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.
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.
Therefore the price per 100 cubic feet divided by 1 037 is equal to the price per therm.
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.
Its heating factor is 50 to 60 btus.
For example chicago and new york are both in zone 4 which has a heating factor of 45 to 50.
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.
Each climate zone has a recommended heating factor which is the suggested number of btus per square foot.
Furnaces are rated on their btus of energy consumption not their btus of energy output.
With a less efficient furnace operating at 80 percent efficiency this would require a.
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.
And in cold climates multiply the square foot number by 30 40.
A more efficient furnace will output more btus of heat than a less efficient furnace with the same btu rating.
You might want to plan to invest in upgrading the insulation putting in new windows and weatherstripping around the doors.
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.
A mid sized home of 2 000 square feet would need approximately 50 000 to 60 000 btu to heat it properly.
Another quick and easy way to estimate the number of btu s required is with this helpful chart.