Gas Furnace Btu Load Calculator

The british thermal unit or btu is an energy unit.

Gas furnace btu load calculator. Heating btu calculator when shopping for heaters many people make the mistake of choosing the wrong size for their actual needs. This btu calculator will determine what hearth product size is required with only a few steps and information such as square footage sq ft. 4 people x 400 1 600. Furnaces are rated on their btus of energy consumption not their btus of energy output.

2 500 x 25 62 500 base 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. Cooling load calculation example. 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.

This hvac load calculator quickly estimates the size of your heating and cooling system in btu s. For example a furnace with an input btu can have an efficiency of 80. This hvac calculator is the closest estimate to the actual manual j calculation done by hvac pros. The actual production of heat called the output btu will be the main factor in deciding which heating unit is right for your.

1 watt is approximately 3 412 btu per hour. To calculate the estimated hvac load for a house with 2 500 square feet 12 windows and 3 exterior doors occupied by 4 people simply plug it into this formula. 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. This should also inform the hvac load that will be sufficient to heat or cool the intended area.

A heating degree day calculation using the month of july as a factor is a more precise way of estimating furnace size. Then to calculate the output on a given gas furnace multiply it s efficiency rating by it s listed input rating to determine the actual btu output of heat. Then to calculate the output on a given gas furnace multiply it s efficiency rating by it s listed input rating to determine the actual btu output of heat. 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.

1 btu 1 055 joules 252 calories 0 293 watt hour or the energy released by burning one match. For example if a furnace has a listed input rating of 90 000 btu s and an efficiency rating of 80 it will produce 90 000 btu input x 80 efficiency 72 000 btu actual output. It is approximately the energy needed to heat one pound of water by 1 degree fahrenheit. What is a btu.

Natural gas for a furnace is priced by the therm or per 100 000 btus. If that same furnace has an efficiency of 95 the furnace will produce 95 000 btu of heat.