Enter the energy loss rate (BTU/hr) and the design temperature difference (F) into the Annual Heat Loss Calculator. The calculator will evaluate the Annual Heat Loss.

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## Annual Heat Loss Formula

The following two example problems outline the steps and information needed to calculate the Annual Heat Loss.

**AHL = ELR / dT * 24 * 365**

Variables:

- AHR is the Annual Heat Loss (BTU/F)
- ELR is the energy loss rate (BTU/hr)
- dT is the design temperature difference (F)

## How to Calculate Annual Heat Loss?

The following steps outline how to calculate the Annual Heat Loss.

- First, determine the energy loss rate (BTU/hr).
- Next, determine the design temperature difference (F).
- Next, gather the formula from above = AHL = ELR / dT * 24 * 365.
- Finally, calculate the Annual Heat Loss.
- After inserting the variables and calculating the result, check your answer with the calculator above.

**Example Problem : **

Use the following variables as an example problem to test your knowledge.

energy loss rate (BTU/hr) = 50

design temperature difference (F) = 15

AHL = ELR / dT * 24 * 365** **= ?