Household · official-source review · reviewed 2026-10-10
A quote for sealing and insulation is easy to accept and hard to compare.
Turn a project cost and an expected monthly saving into a payback time in months and years.
Homeowners and renters weighing a weatherization quote against other spending.
Use the source document or official route that applies to your situation. This guide does not contact another person or verify external information.
Write the full quoted price, including labour and materials, after any rebate you have in writing.
Write the monthly saving the assessment supports. Use a conservative figure you can defend.
Divide the price by the saving and round up. That is the payback in months.
Divide the months by 12. Compare that with how long you expect to stay.
Multiply the saving by 12. If the first-year saving is small, the payback is long.
A $1,200 project saves $40 a month. That is 30 months, 2.5 years, and $480.00 saved in the first year.
Use your own source and details. The example is not a record about a real person or organization.
U.S. Department of Energy, Energy Saver · reviewed 2026-10-10
What this source supports: Energy Saver describes seasonal maintenance and weatherization steps that reduce heating and cooling loss.
Source limit: Housing types and climates differ. Tasks that involve combustion equipment require a qualified technician.
These sources support the statements above. They do not show that every person needs this guide. They do not show a specific result.
This guide divides cost by saving. It does not audit your home or verify a contractor's saving claim.
Housing types and climates differ. Tasks that involve combustion equipment require a qualified technician.
Use current instructions from the responsible organization. This guide is a planning aid, not an official decision or a substitute for qualified advice.
Turn a project cost and an expected monthly saving into a payback time in months and years.
This App divides the numbers you enter. It does not audit your home, verify a saving claim, or predict future energy prices.
You enter every number yourself. The sources support the method and the limits. They do not produce a result for your specific case. Keep the original documents next to the sheet you build.
The App computes the worked example with your own numbers, in your browser.
APP 1
Turn a project cost and an expected monthly saving into a payback time in months and years.
Free · no account · no upload
Open Weatherization Payback MonthsThe App runs in this browser. It does not send or save entries. Copy, download, or print only when you choose.
This guide uses short, direct instructions as an ASD-STE100-style writing target. It is not a formal certification.
Companion App: Weatherization Payback Months. It runs in this browser and does not upload your entries.
This guide is edited for clarity and checked against the sources it links. It is not a substitute for official instructions or qualified advice. A linked source does not show that every person needs this guide.