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New Hampshire · checked October 20, 2026
Insulation and air sealing rebates in New Hampshire
1 program pays toward insulation and air sealing in New Hampshire right now, with 2 separate offers between them. The largest stated amount is $6,000 (a maximum), from NHSaves Home Energy Performance (weatherization) (Home Energy Performance). The federal 25C credit for this upgrade ended on December 31, 2025, so the state and utility money below is what is left.
What New Hampshire pays for insulation and air sealing
NHSaves Home Energy Performance (weatherization) Open
Run by NHSaves (Eversource, Liberty, NHEC, Unitil) · for customers of 4 utilities
- Home Energy Performance: Up to $6,000 in rebates on overall improvement costs
- Eversource income-eligible: No-cost air sealing and insulation for Eversource households at or below 100% of state median income low income
Conditions on the program page: Participation in Home Energy Performance with an in-home energy audit; Income-eligible limit (Eversource): $156,133 for a household of four.
Also on the page: Financing: 0% APR for Eversource customers, 2% APR for Liberty, NHEC and Unitil, $1,000–$15,000.
Source: NHSaves: Weatherization (page updated October 20, 2026). Last checked October 20, 2026. Official program page.
Worked example: one New Hampshire home
Take 1,000 square feet of attic insulation across 2 large zones, on a project that costs $5,000, in a home heated with oil. These are example inputs, not typical prices. Each program's own rule gives the amounts below; where one program has several tiers only the largest one counts, separate programs add up, and a percentage offer with no cost entered is shown at its ceiling.
| Utility | Not income-qualified | Moderate income | Low income |
|---|---|---|---|
| Eversource (New Hampshire) | $5,000 max | $5,000 max | $5,000 max |
| Liberty Utilities (New Hampshire) | $5,000 max | $5,000 max | $5,000 max |
| Unitil (New Hampshire) | $5,000 max | $5,000 max | $5,000 max |
| New Hampshire Electric Cooperative | $5,000 max | $5,000 max | $5,000 max |
For a household that is not income-qualified, the example comes to $5,000 at most, made of $5,000 from NHSaves weatherization (Home Energy Performance). The income-qualified offers here do not change this example's total, either because their amount is not stated on the program page or because the standard offer is already the larger one. All 4 listed utilities come out the same, because the money comes from a shared program.
Who can use these New Hampshire offers
Every household in New Hampshire covered by NHSaves can apply; the offers are not limited to one utility's territory. None of these program pages lists an end date, and each can change or stop while funds last.
Federal credit and state IRA rebates
The Energy Efficient Home Improvement Credit (IRC §25C) paid 30% of insulation and air-sealing materials, within the $1,200 annual limit (labor not included). The IRS page says: “can claim the credit for improvements made through December 31, 2025.” Not allowed for property placed in service after December 31, 2025. Source: IRS: Energy Efficient Home Improvement Credit, 26 U.S.C. §25C, as amended by Public Law 119-21 (July 4, 2025). See what the credit covered and when it ended.
NH Home Electrification and Appliance Rebates (HEAR): Not launched. “Currently, the Home Electrification and Appliance Rebates Program funding is not available to NH consumers.” The planned federal cap for this upgrade on the state page is $1,600, but it cannot be claimed today. Source: NH Department of Energy: Home Electrification and Appliance Rebates (updated May 1, 2024).
How New Hampshire compares
3 of the other 14 covered states list a larger top amount for insulation and air sealing. Open elsewhere: Connecticut $10,000; Maine $8,600; Vermont $7,000; Massachusetts $5,000; North Carolina $1,600; Oregon $1,500; Wisconsin $1,475; Arizona $600. No open, sourced offer is listed in 6 other covered states (California, Florida, Michigan, Pennsylvania, Rhode Island, Texas). Compare them on the insulation and air sealing rebates by state page.
Other upgrades in New Hampshire: air-source heat pump, heat pump water heater. Background: how rebates stack and the federal credit status.
Rebates are set by each program and can change or close without notice; the program's own page and application decide what is paid. This page is information, not tax, legal or financial advice. Amounts last checked October 20, 2026.