Score breakdown: 69/100
RatingPlate Score. Based on EIA energy prices, ENERGY STAR data, state rebate programs, and permit research. Not a government rating or purchasing recommendation. FAQ
New Hampshire electricity is 49% above the national average. Here's what that means for heat pump operating costs.
Running cost in New Hampshire
At New Hampshire's 26.9¢/kWh electricity rate, the most efficient heat pump water heater saves an estimated $988 per year compared to a standard electric tank.
New Hampshire electricity
26.9¢
per kWh (EIA, 12-month avg. through Aug 2026)
Best HP annual cost
$224
A. O. Smith HPTS-50-2
Electric resistance
$1213
~4,500 kWh/yr baseline
Colder inlet water (46°F annual average, 34°F in winter) means the heat pump works harder than DOE test conditions assume (58°F). Real-world efficiency will be slightly lower than rated UEF, and winter operating costs will be higher than the annual average.
Heat pump vs gas tank in New Hampshire
At New Hampshire prices (26.9¢/kWh electricity, $1.95/therm gas), a heat pump costs about $107 less per year to run than a standard gas tank, on the same DOE rated hot water load. See replacing a gas water heater in 2026 and all 50 states compared.
Heat pump
$230/yr
855 kWh/yr (median 50-gal)
Gas tank
$337/yr
173 therms/yr (UEF 0.64)
Difference
$107/yr
heat pump cheaper
Both use the DOE medium draw test load (55 gallons a day). Gas price: EIA, 12-month avg. through Aug 2026. Replacing gas with a heat pump also means adding a 240V circuit (or choosing a 120V model) and a condensate drain, and the federal HEAR rebate no longer covers gas replacements.
Why New Hampshire changes the call
01Energy costNew Hampshire electricity is 49% above the national average. That directly affects how much a heat pump saves compared to a standard electric tank.
02Climate impactIncoming water averages 46°F annually and drops to about 34°F in winter. Colder water means the heat pump works harder and real efficiency is slightly lower than rated.
03Available incentivesState and utility rebates can significantly change the payback period. Check what's currently available before finalizing your decision.
Rebates in New Hampshire
New Hampshire has 1 rebate program as of March 2026.
The federal $2,000 tax credit (IRA Section 25C) expired December 31, 2025. State and utility rebates listed below may still be available. Verify current status at the links provided.
NHSaves Heat Pump Water Heater Rebate
$900
Who: NHSaves (Eversource, Liberty, Unitil, NH Electric Co-op)
Eligibility: ENERGY STAR integrated unit up to 85 gallons with UEF 3.30 or higher (2.80 for 120-volt/15-amp, and 2.80 for split systems). Instant discount via participating distributors or Home Depot and Lowe's, or post-purchase rebate.
https://nhsaves.com/residential/heat-pump-water-heater-2/
IRA HEAR Rebate (Point-of-Sale)
Not yet available in New Hampshire as of March 2026. Up to $1,750 for income-qualified households when available. Under federal guidance effective May 29, 2026, this rebate covers replacing an existing electric water heater (or new construction). Replacing a gas, propane, or oil water heater no longer qualifies.
Independent rebate trackers reported in September 2026 that New Hampshire had not launched its IRA Home Electrification and Appliance Rebates (HEAR) program, with a targeted launch in late 2026. Check the NH Department of Energy for current status.
Install requirements in New Hampshire
Electrical
Dedicated 240V, 30A circuit (most models). Some newer 120V plug-in models exist but most residential units require 240V. Check the unit's nameplate for exact requirements.
Condensate drain
Heat pump water heaters produce condensate during operation. A condensate drain line to an approved location (floor drain, condensate pump, or exterior) is required.
Air space
Approximately 700 cubic feet of surrounding air (roughly a 10x10x7-foot room). The heat pump extracts heat from surrounding air. Insufficient air volume reduces efficiency and can cause the unit to underperform. Some manufacturers allow ducting to supplement air supply in smaller spaces.
Noise
Heat pump water heaters produce operational noise similar to a window AC unit (45-55 dB). Consider placement away from bedrooms.
Best fits for New Hampshire
A smaller set of representative fits using New Hampshire's 26.9¢/kWh rate. Curated to show different trade-offs instead of listing every published model on every state page. See the full heat pump lineup.
Prefer to buy online? The 46-gallon Rinnai REHP50BM is a heat pump available on Amazon.
Common questions: New Hampshire
Is a heat pump water heater worth it in New Hampshire?
Yes. New Hampshire scores B on RatingPlate's analysis, with estimated savings of $988 per year compared to a standard electric tank. Payback on the higher upfront cost is roughly 2.4 years before rebates.
What rebates are available for heat pump water heaters in New Hampshire?
New Hampshire has 1 rebate program. The IRA HEAR program has not launched in New Hampshire yet. Verify amounts and eligibility at the links in the rebates section above.
How much does a heat pump water heater cost to run in New Hampshire?
At New Hampshire's electricity rate of 26.9 cents per kWh, the most efficient heat pump water heater costs about $224/yr to run. A standard electric tank costs about $1212 per year.
Do I need a permit for a heat pump water heater in New Hampshire?
New Hampshire does not have unusual state-level requirements beyond standard plumbing and mechanical permits. Check with your local building department for jurisdiction-specific rules.
What is the payback period for a heat pump water heater in New Hampshire?
Without rebates, the payback period in New Hampshire is approximately 2.4 years based on $988 in annual savings versus a standard electric tank. With available rebates, payback could be significantly shorter.
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Sources
Electricity and natural gas rates: U.S. Energy Information Administration, residential sector (EIA, 12-month avg. through Aug 2026).
Rebate data compiled from state energy offices, utility program pages, DSIRE, and ENERGY STAR. Rebate amounts and eligibility change frequently. Verify at listed program URLs.
Inlet water temperatures estimated from NOAA climate normals using the Burch-Christensen mains water temperature model (NREL).
Model specifications from ENERGY STAR certified product data and manufacturer spec sheets.
Page updated November 1, 2026. Data freshness varies by source.
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