Fuel Use → Heatload


Heating: Heat loss at design based on annual fuel consumption.
Design heat load can be calculated based on average annual fuel used for heating. Select fuel type, enter average total units of fuel used for heating, and the steady state efficiency of your current heating system. We will use the Manual J Degree Days and 97.5% Outdoor Design Temperature based on your current location. Output is design heat load estimate in BtuH for your structure.

Fuel Type

Fuel Efficiency

Units Of Fuel Per Year

Design Degree Days

Design ΔT °F*


Calculation Results Below

C Factor Calculated


Design Heat Load BtuH