Will a heat pump pay off in Westbrook, ME?

Here in Westbrook, the honest answer is that a heat pump raises your annual running cost. Against a like-for-like gas furnace and AC swap, going electric costs $3,500 more up front here (already netting out a $2,000 tax credit). Running costs here land $340 a year HIGHER than the furnace it replaces, so that premium is never recovered. That's Westbrook's own climate and rates talking, not a hedge or a caveat.

Westbrook's weather, in the numbers that matter

6236 heating degree days pile up here every year, so Westbrook has a cold winter that leans hard on heating equipment; the cooling side runs to 470 cooling degree days, where summers add a moderate cooling load. 7°F is the figure equipment gets sized against here — the 99th-percentile cold snap, not an average day — with a record low of 5°F on file. Worked through the model, that's a seasonal COP of 2.87 on the cold-climate unit fit for this climate. Westbrook needs the cold-climate class of unit: past a 25°F design temperature a standard heat pump falls back on resistance backup often enough to eat the savings. Climate figures trace to the nearest NOAA station, PORTLAND INTERNATIONAL JETPOR, 5.2 miles from Westbrook.

The month-to-month numbers for Westbrook

Electricity use for heating alone comes out to about 5,502 kWh a year on the 2000-square-foot reference house; folding in cooling puts the electric bill near $1,752 a year. Westbrook's gas rate of 18.95 per Mcf, applied to the 65 Mcf a year the furnace burns, puts its running cost near $1,412 a year, against 29.68¢ per kWh for electricity. Looked at as a full purchase rather than an incremental one, payback here is longer than the 15-year equipment life, leaving the 15-year total $8,606 behind.

The other scenario: no gas furnace to begin with

Gas isn't universal in Westbrook — many houses run on electric heat already. Against electric-resistance heat — baseboard or an electric furnace, both 100% efficient but still just resistance — the case for switching gets stronger here. About $3,115 a year comes back this way, enough that the 2.6-year payback clears the $8,000 premium comfortably within the equipment's life.

Westbrook against the rest of the country

Among 3206 cities, Westbrook's winter puts it at rank 140 for severity, while its size puts it at rank 1817 for population — 1 in both cases being the extreme. That's the coldest third of the dataset, where climate does most of the work behind this figure.

Deciding what's next in Westbrook, ME

Westbrook, Maine is home to about 21,386 people, and the figures above are the same ones a local HVAC contractor uses to size and quote a system — this site doesn't guess where a real quote would land, it just tells you whether it's worth asking for one. In Westbrook, nothing is lost by holding off until the current equipment genuinely fails.

Ask a local HVAC contractor for a quote before committing either way.

More on how this number was built

The methodology guide walks through exactly how Westbrook's 2.87 seasonal COP and the rest of this page's numbers get built. At a 7°F design temperature, Westbrook sits in cold-climate territory; the guide to that class of unit explains why.