How it works
Simple payback years = net installed cost divided by annual energy saving.
Input definitions
- Installed insulation cost
- Enter the value in the labeled unit.
- Confirmed rebate
- Enter the value in the labeled unit.
- Estimated annual energy saving
- Enter the value in the labeled unit.
A worked example
- Installed insulation cost
- 4200
- Confirmed rebate
- 700
- Estimated annual energy saving
- 520
Assumptions & limits
Uses only the values entered and does not fetch live prices, fees, rates or eligibility rules. Verify quotes, contracts, measurements and local requirements before acting.
Sources & review
Maintained by AnsRio. Methods and examples use automated checks; this does not imply independent professional certification.
Method updated 2026-10-20. Content checked against the stated method and examples. Our verification approach.
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Common questions
Does simple payback include energy-price changes?
No. It holds annual savings constant and excludes financing and comfort benefits.
How does Insulation upgrade simple payback calculate the result?
Simple payback years = net installed cost divided by annual energy saving.
What should I check before using Insulation upgrade simple payback?
Uses only the values entered and does not fetch live prices, fees, rates or eligibility rules. Verify quotes, contracts, measurements and local requirements before acting.