Gas Furnace Efficiency Calculator

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Gas furnace efficiency calculator.

High efficiency furnace payback calculator change inputs. Use this free furnace efficiency calculator from new jersey hvac leader a j. Now if 1 gallon of residential fuel oil has about 138 500 btus can you do a straight calculation using these numbers. If you would like your furnace inspected for efficiency or want further advice on the best furnace size for your home schedule an appointment with the trained service professionals at john c.

I know or at least i think i know that to figure steady state efficiency divide the btu output by the input. But many furnace spec plates don t have a btu input listed. For example if a furnace has a listed input rating of 90 000 btu s and an efficiency rating of 80 it will produce. An all electric furnace does not generate flue gases and therefore does not have the heat loses associated with that.

The afue savings calculator is designed to help you compare the heating costs of furnaces boilers and heat pumps with different efficiency ratings expressed in afue or hspf and fuel types. Find out if your home s furnace is in need of maintenance repair or replacement. Furnace efficiency is calculated after subtracting sensi ble heat loss in flue gas loss due to moisture in flue gas heat loss due to openings in furnace heat loss through furnace skin and other unaccounted losses from the input to the furnace. The calculator estimates your heating cost savings over a one five ten and fifteen year period.

The example i ve got in front of me right now is a. Compare the payback of two new furnaces here end of year old furnace utility cost new furnace utility cost accumulated. 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. The efficiency of such boilers is between 95 to 100.

To save energy money and avoid discomfort make an informed decision by using a furnace size calculator and discover the number of btus needed for your furnace to run satisfactorily. In order to find out furnace efficiency using indirect method various parameters that are. Furnace information estimated efficiency of present furnace. Instead they ll have gallons or litres per hour.