Rebates and tax credits in New Hampshire

Money toward an HRV or ERV

Programs that pay toward the unit itself. Some take the money off at the distributor, so ask whether an installer’s price already includes it.

• NHSaves natural gas heating equipment rebate: Heat Recovery Ventilator

  Liberty Utilities (New Hampshire), through NHSaves · Residential natural gas heating customers of Liberty in New Hampshire

  $500 per unit

  Portable units are excluded. The form defines the unit as "a factory-assembled, packaged unit including fans or blowers that transfer heat between two isolated airstreams"; no efficiency rating is listed. Purchase and installation between January 1, 2026 and December 31, 2026; the form must be received by January 31, 2027. NHSaves says a licensed heating contractor or plumber must install the equipment, and the claim needs a dated invoice with model number, manufacturer, contractor and installation cost. ERVs are not listed.

  Names HRVs or ERVsProgram page: 2026 New Hampshire Residential Rebate Form (file dated 2026-08-25)

• NHSaves natural gas heating equipment rebate: Heat Recovery Ventilator

  Unitil, through NHSaves · Natural gas customers of Unitil in New Hampshire

  $500 per heat recovery ventilator (portable units excluded)

  Installed by a licensed heating contractor or plumber between January 1, 2026 and December 31, 2026, while funding is available. Claims use the 2026 Unitil mail-in form or online portal. ERVs are not listed.

  Names HRVs or ERVsProgram page: 2026 form, dated December 22, 2025

Federal home energy rebates

Federal money that New Hampshire runs. HEAR has a category for “insulation, air sealing, and ventilation” worth up to $1,600 for households under 150% of area median income; each state decides what counts as ventilation. ENERGY STAR’s table for HEAR says this category requires ENERGY STAR certification, and ENERGY STAR’s U.S. criteria for ventilation cover fans, not HRVs or ERVs, so ask the program whether an HRV or ERV counts before relying on it. HOMES pays toward whole-home upgrades modeled to save energy.

Air sealing and insulation

These programs are more common than ventilation rebates, and sealing a house is often what makes it need planned fresh air. If a program is sealing yours, ask whether it requires ventilation afterward and whether it pays for it.

• NHSaves Home Energy Performance

  NHSaves (Eversource, Liberty Utilities, New Hampshire Electric Co-op and Unitil) · Customers of the four NHSaves utilities; homes heated with any fuel, including oil, propane and wood

  "75 percent of the cost of qualified measures, up to $6,000 in incentives," plus no-interest loans up to $15,000. The audit ($500 value) costs $100, deducted from the project cost if you go ahead. You first check eligibility with the Home Heating Index tool, which needs 12 months of heating use. Work is done by a utility-approved Home Energy Performance contractor and verified by re-testing. Ventilation is not mentioned.

  Ventilation not mentioned in what we readProgram page: Page last modified 2026-09-17

State tax credits

We didn’t find a New Hampshire tax credit for ventilation, air sealing or insulation, and couldn’t confirm there is none.

Low-income help

The federal Weatherization Assistance Program can pay for air sealing, insulation and, where needed, ventilation at no cost to households that qualify by income. In New Hampshire it’s run by New Hampshire Department of Energy, delivered by local Community Action Agencies; income up to 60% of State Median Income, with a waiting list and a home energy audit first..

Before you sign

1. Don’t start work yet. Many programs need pre-approval, a participating contractor or a test first, and work begun early often can’t qualify.
2. Write down your electric and gas utilities. Rebates usually follow the utility, not the town.
3. Read the conditions: a listed contractor, a qualifying model, your heating fuel, income limits, and install and claim deadlines.
4. Ask each installer whether any discount is already in their price, and who files the paperwork.
5. Get it in writing: each rebate, who applies for it, and what happens to the price if it’s denied.

More on costs and how to check: What drives the cost of ventilation and How to compare quotes.

Worth knowing

• New Hampshire's HRV rebates are only for natural gas customers of Liberty or Unitil. Homes heated with oil, propane, wood or electricity, or served by Eversource or the Co-op for electricity only, are not covered by this offer. ERVs are not named. (sources s13, s14)
• Utility pages give different weatherization figures: NHSaves says 75% up to $6,000; Unitil's natural gas Home Performance page (undated) says "a 50% rebate up to $6,000"; a Liberty flyer (undated) says 100% of air sealing and 75% of insulation, up to $8,000. Confirm the current offer with your utility before work starts. (sources s12, s15, s16)
• The state's Weatherization Assistance Program page lists attic air sealing and insulation, wall insulation and basement or crawl space work as priorities; it does not list ventilation as a program measure. (source s17)
• DOE changed the federal HEAR rules in May 2026 (Program Notice 26-2, effective May 29, 2026): HEAR can no longer pay to replace gas, oil or propane equipment with electric, homes generally must use rebates for insulation and air sealing before other upgrades, and ventilation is still a HEAR project type. Programs that had not launched must follow the new rules. (source s9)