Enter the cost of HVAC before insulation ($), the cost of HVAC after insulation ($), and the cost of insulation ($) into the Return on Insulation Calculator. The calculator will evaluate and display the Return on Insulation.

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## Return on Insulation Formula

The following formula is used to calculate the Return on Insulation.

**ROINS = (CBI – CAI) / CI * 100**

- Where ROINS is the Return on Insulation (%)
- CBI is the cost of HVAC before insulation ($)
- CAI is the cost of HVAC after insulation ($)
- CI is the cost of insulation ($)

## How to Calculate Return on Insulation?

The following example problems outline how to calculate Return on Insulation.

**Example Problem #1**

- First, determine the cost of HVAC before insulation ($).
- The cost of HVAC before insulation ($) is calculated to be : 1000.

- Next, determine the cost of HVAC after insulation ($).
- The cost of HVAC after insulation ($) is measured to be: 500.

- Next, determine the cost of insulation ($).
- The cost of insulation ($) is found to be: 2,000.

- Finally, calculate the Return on Insulation using the formula above:

ROINS = (CBI – CAI) / CI * 100

The values given above are inserted into the equation below and the solution is calculated:

ROINS = (1000 – 500) / 2,000 * 100 = 25.00 (%)

**Example Problem #2**

The variables needed for this problem are provided below:

cost of HVAC before insulation ($) = 6000

cost of HVAC after insulation ($) = 3000

cost of insulation ($) = 5000

This example problem is a test of your knowledge on the subject. Use the calculator above to check your answer.

ROINS = (CBI – CAI) / CI * 100 =** **(%)