Gas Furnace Btu Load Calculator

If that same furnace has an efficiency of 95 the furnace will produce 95 000 btu of heat.

Gas furnace btu load calculator.

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. 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. 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. 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.

Cooling load calculation example. 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. Furnaces are rated on their btus of energy consumption not their btus of energy output. This should also inform the hvac load that will be sufficient to heat or cool the intended area.

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. 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. What is a btu. 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. That means the furnace will produce 80 000 btu of heat. This btu calculator will determine what hearth product size is required with only a few steps and information such as square footage sq ft.

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. 2 500 x 25 62 500 base btu. Heating btu calculator when shopping for heaters many people make the mistake of choosing the wrong size for their actual needs. 1 watt is approximately 3 412 btu per hour.

4 people x 400 1 600. 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. A more efficient furnace will output more btus of heat than a less efficient furnace with the same btu rating. Natural gas for a furnace is priced by the therm or per 100 000 btus.

It is approximately the energy needed to heat one pound of water by 1 degree fahrenheit. A heating degree day calculation using the month of july as a factor is a more precise way of estimating furnace size.