$Savings and rebates
Honest savings math, before you spend a dollar.
Run your own numbers with your fuel, your usage and today's prices. Every assumption is on the page.
01Savings calculator
What would a heat pump cost to run in your house?
Good fit. A heat pump should cost less to run than your oil system.
- Heat pump power use
- 8,936 kWh
- Installed price, typical
- $17,500
- Heat pump rebate (adjust)
- -$2,000
- System you no longer buy
- $0
- Net cost
- $15,500
- Simple payback
- 33 years
Assumptions: oil 138,500 BTU/gal at 84% efficiency, propane 91,500 BTU/gal at 88%, gas 100,000 BTU/therm at 92%, baseboard 100%. Heat pump seasonal efficiency 2.9. Typical prices: whole home $17,500, main rooms $8,200. Replacement prices avoided: oil boiler $9,500, propane furnace $7,000, gas furnace $6,500. Estimate only, not a quote.
02Rebate estimator
What rebates might apply in 2026?
Amounts depend on the project and your household income. We confirm the current programs at your audit and file the paperwork.
For a household of four in the Portland area, 150% of median is roughly $190,000. We check the exact limits with you.
Example amounts for this demo. Real program amounts and income limits change often. We confirm what applies to your house at the audit. The payback above uses the heat pump rebate only. Weatherization rebates pay for the insulation work.
03Paying for it
Low-rate energy loans, rebates taken off up front.
We take the rebates off your invoice when the program allows it, so you finance less.
- Energy loans from 4.99% APR for 5 to 15 years, with approved credit
- No prepayment penalty
- Rebate paperwork filed by our office
Example: $12,000 at 4.99% for 10 years is about $127 a month.

04Questions
About these numbers.
How close is the estimate to a real result?
For the 214 homes we monitored in 2025, first-winter costs landed within 15% of the audit estimate for 9 out of 10 homes. This page uses typical values, so treat it as a starting point.
Why does natural gas show a loss?
At current Maine prices, gas heat is cheap and electricity is not. A heat pump can still make sense for AC or as a hybrid, but we will not tell you it saves money when the math says otherwise.
Does the calculator include summer cooling?
No. It compares heating only. Most customers add AC for the first time, which costs about $80 to $150 a summer to run.
What happened to the federal tax credit?
The Energy Efficient Home Improvement Credit (25C) ended for property placed in service after December 31, 2025. Systems installed in 2026 do not qualify. State and utility programs are separate and still running.
Get numbers from your own house.
The audit replaces every typical value on this page with a measurement.