Enter the surface area (ft^2), the temperature differential (F), and the R-value into the Heat Loss from R-Value Calculator. The calculator will evaluate the Heat Loss from R-Value.

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## Heat Loss from R-Value Formula

The following formula is used to calculate the Heat Loss from R-Value.

HLR = SA * dT / R

Variables:

- HLR is the Heat Loss from R-Value (BTU/hr)
- SA is the surface area (ft^2)
- dT is the temperature differential (F)
- R is the R-value

To calculate the heat loss, multiply the surface area by the temperature differential, then divide by the R-value.

## How to Calculate Heat Loss from R-Value?

The following steps outline how to calculate the Heat Loss from R-Value.

- First, determine the surface area (ft^2).
- Next, determine the temperature differential (F).
- Next, determine the R-value.
- Next, gather the formula from above = HLR = SA * dT / R.
- Finally, calculate the Heat Loss from R-Value.
- 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.

surface area (ft^2) = 5

temperature differential (F) = 7

R-value = 8HLR = SA * dT / R =** ** ?