Heat Pump Payback in Braintree Town, MA
Is a heat pump worth it in Braintree Town?
Braintree Town technically pencils out, but only past the point the equipment would need replacing anyway. Against a like-for-like gas furnace and AC swap, going electric costs $5,500 more up front here. Braintree Town's residents would see roughly $134 a year back in running costs, putting the payback around 41.1 years. Braintree Town's own numbers say this pencils out only in theory, not in practice.
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This runs the same numbers for 3206 US cities, not just Braintree Town. Look one up here.
The climate behind Braintree Town's payback figure
Braintree Town has a real but manageable winter, 4997 heating degree days a year against a 65°F base, and summers add a moderate cooling load, at 885 cooling degree days. 10.9°F is the figure equipment gets sized against here, the 99th-percentile cold snap, not an average day, with a low of 5°F in the 2024 station record. Worked through the model, that's a seasonal COP of 2.96 on the cold-climate unit fit for this climate. Below the 25°F line where a standard machine starts leaning on resistance backup, Braintree Town sits firmly in cold-climate territory, so that's the class of unit priced here. Source: NOAA station Norwood Memorial Airport, 8.9 miles from Braintree Town, the closest one on record.
The yearly running costs in Braintree Town
A 2000-square-foot house here would pull roughly 4,275 heating kilowatt-hours annually on top of cooling, totalling about $1,516 a year on electricity. The gas furnace it replaces burns roughly 52 Mcf a year at $25.06 per Mcf here, for a running cost near $1,650 a year including the old AC (electricity here runs 30.15¢/kWh). If the current system still worked and you replaced it anyway, the full cost would take longer than the 15-year equipment life to earn back; against buying a new furnace and AC regardless, the 15-year total lands $3,495 behind.
What would change Braintree Town's answer
This result holds unless electricity climbs above 33.6¢/kWh (it is 30.15¢ now) or gas drops below $22.49 per Mcf (now $25.06); past either point, gas becomes the cheaper fuel in Braintree Town. When quotes arrive, compare the heat pump price with a like-for-like furnace and AC replacement: at $134 a year saved, a difference under $938 pays back within 7 years here, and under $1,340 within 10.
Electric resistance heat in Braintree Town, compared
Not every home in Braintree Town has gas service. Compared with baseboard or electric-furnace resistance heat, the numbers shift in the heat pump’s favor. About $2,644 a year comes back this way, enough that the 3.8-year payback clears the $10,000 premium comfortably within the equipment's life.
Where Braintree Town ranks in this dataset
Among 3206 cities, Braintree Town's winter puts it at rank 708 for severity, while its size puts it at rank 1056 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.
What to do with this number in Braintree Town
About 39,134 people live in Braintree Town, Massachusetts, and every number on this page is what a contractor would actually work from when quoting a system here, the point isn't to replace that quote, it's to tell you whether to bother asking for one. Here, there's no cost penalty to waiting until your current furnace or AC actually needs replacing.
Ask a local HVAC contractor for a quote before committing either way.
Reading further on this page's numbers
Every constant behind this page, the 2.96 seasonal COP, the degree-day corrections, the equipment costs, is documented in the methodology guide. Braintree Town's 10.9°F design temperature falls on the cold side of the 25°F cutoff the cold-climate unit guide walks through.