Gas Furnace Btu Load Calculator

Calculate how many btus you need to heat a room or even a house with a wood burning pellet or gas fireplace insert or stove.

Gas furnace btu load calculator.

Btu calculator ac btu calculator. 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. 83 700 btu actual output. For example a furnace with an input btu can have an efficiency of 80.

Different furnaces of the same input btu have different efficiencies measured in percentages. A furnace s size determines on how much heat it can produce in an hour. Natural gas is measured in therms or btus. This btu calculator will determine what hearth product size is required with only a few steps and information such as square footage sq ft.

Most furnaces are offered in 15 000 20 000 btu increments so you just. What is a btu calculator. Furnaces are rated by the amount of fuel energy consumed when running called input btu. Given all the different options available for heaters space vented gas console and more narrowing down the choices can be a great way to ensure that you are choosing the best option.

Heating btu calculator when shopping for heaters many people make the mistake of choosing the wrong size for their actual needs. A btu or british thermal unit is the quantity of heat required to raise the temperature of one pound of water by one degree fahrenheit. Most homeowners have difficulties figuring out what size of furnace do they need. One btu represents the energy needed to heat a single pound of water by one degree fahrenheit.

A therm is a measurement of the amount of heat energy in natural gas equal to 100 000 btus. The heat load estimate is based on your climate region total square footage number of rooms or zones you want ceiling height insulation type number of windows and doors. Fortunately calculating furnace size be it natural gas propane or oil is not rocket science. A more efficient furnace will output more btus of heat than a less efficient furnace with the same btu rating.

How many btu furnace would fit your home perfectly. That means the furnace will produce 80 000 btu of heat. This hvac calculator is the closest estimate to the actual manual j calculation done by hvac pros. This hvac load calculator quickly estimates the size of your heating and cooling system in btu s.

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 8. Furnaces are rated on their btus of energy consumption not their btus of energy output.