Boston / Weymouth

Heat pump installation in Weymouth, MA - up to $8,500 Mass Save rebate

Weymouth, 10 miles out

Weymouth is about 10 miles from the Census center point for Boston in a straight line and covers 16.765 square miles of land (Census 2024 Gazetteer internal points and land area, https://www2.census.gov/geo/docs/maps-data/data/gazetteer/2024_Gazetteer/, checked 2026-10-19).

Weymouth has 58,505 residents (give or take 33) (ACS 2020-2024 5-year, table B01003, https://data.census.gov/table/ACSDT5Y2024.B01003?g=060XX00US2502178972, checked 2026-10-19), about 3,490 people per square mile.

The quote form takes a ZIP code; for Weymouth that is 02188, 02189, 02190, 02191 (Census 2020 ZCTA to county subdivision relationship file, ZIP areas at least 20% inside the town, https://www2.census.gov/geo/docs/maps-data/data/rel2020/zcta520/tab20_zcta520_cousub20_natl.txt, checked 2026-10-19).

3,490 people per square mile puts Weymouth in suburban density, where the outdoor unit usually sits in a side yard and the noise is not an issue for neighbors.

What heats Weymouth

Of the 25,759 occupied homes in Weymouth, 46% heat with natural gas, 27% with heating oil, 24% with electricity and 3% with propane (ACS 2020-2024 5-year, table B25040, https://data.census.gov/table/ACSDT5Y2024.B25040?g=060XX00US2502178972, checked 2026-10-19).

Weymouth has 4 points more oil heat than Norfolk County as a whole, where 23% of homes burn oil, and 6 points more electric heat than the county's 18% (ACS 2020-2024 5-year, table B25040, https://data.census.gov/table/ACSDT5Y2024.B25040?g=050XX00US25021, checked 2026-10-19).

Gas leads in Weymouth at 46%, but 29% of homes still burn delivered oil or propane, and those 7,470 or so homes are where a heat pump pays back fastest.

Age of the housing

The median Weymouth home was built in 1964 (ACS 2020-2024 5-year, table B25035, https://data.census.gov/table/ACSDT5Y2024.B25035?g=060XX00US2502178972, checked 2026-10-19) and the median home has 5.4 rooms (ACS 2020-2024 5-year, table B25018, https://data.census.gov/table/ACSDT5Y2024.B25018?g=060XX00US2502178972, checked 2026-10-19).

Weymouth has 26,733 housing units, 22% built before 1940 and 71% before 1980, with 13% built in 2000 or later (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=060XX00US2502178972, checked 2026-10-19).

Weymouth has 4 points fewer pre-1940 homes than Norfolk County as a whole (26%) (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=050XX00US25021, checked 2026-10-19).

Only 13% of Weymouth homes are new enough to pass the whole-home rebate's weatherization check on age, and 22% date from before 1940, so most of the other 87% show it with a home energy assessment before the heat pump goes in.

House type

55% of Weymouth homes are single-family detached, 7% are in two- to four-unit buildings and 33% are in buildings of five or more units (ACS 2020-2024 5-year, table B25024, https://data.census.gov/table/ACSDT5Y2024.B25024?g=060XX00US2502178972, checked 2026-10-19).

33% of Weymouth homes are rented (ACS 2020-2024 5-year, table B25003, https://data.census.gov/table/ACSDT5Y2024.B25003?g=060XX00US2502178972, checked 2026-10-19), so beside the 55% detached houses there is a real share of jobs where the landlord, not the resident, signs the quote.

Utility and rebate

No electric utility is on file for Weymouth on this door yet, so this page does not name one; the name on the bill decides which rebate path applies.

If the Weymouth electric bill comes from one of the Mass Save sponsors (Cape Light Compact, Eversource, National Grid, Unitil), the whole-home heat pump rebate is $2,650 per ton up to $8,500, and the partial-home rebate is $1,125 per ton up to $8,500; for projects installed on or after January 1, 2027, the whole-home figure drops to $2,350 per ton capped at $7,500 (Mass Save air-source heat pump rebates, https://www.masssave.com/residential/rebates-offers-services/heating-and-cooling/heat-pumps/air-source-heat-pumps, checked 2026-10-19).

Median household income in Weymouth is $102,714 (ACS 2020-2024 5-year, table B19013, https://data.census.gov/table/ACSDT5Y2024.B19013?g=060XX00US2502178972, checked 2026-10-19); Mass Save's enhanced heat pump incentives are income-based and decided household by household, so the town median only hints at how many neighbors qualify.

Design temperature

Heating design temperature: 1F. Source: ENERGY STAR Design Temperature Limit Reference Guide (2019 Edition), Norfolk County row, 99% heating, PDF page 56 of 141 (Revised 11/11/2020), https://www.energystar.gov/sites/default/files/Design%20Temperature%20Limit%20Reference%20Guide%20(2019%20Ed)%20-%20ENERGY%20STAR%20Single-Family%20New%20Homes_Rev11.pdf, fetched 2026-10-19, 99%.

That 1F figure is the Norfolk County cold-day number a Weymouth heat pump is sized against, so ask the installer to show the system's heating output at 1F, not at the milder rating-label temperature.

Next step

Ask whether the quote is whole-home or partial-home, because with 46% of Weymouth on gas and 24% already electric the two paths carry different rebate figures and different sizing.

Ask for the heat-loss calculation room by room; the median Weymouth home has 5.4 rooms and was built around 1964, and the count of heads and the tonnage follow the rooms and the insulation, not the square footage.

The form on this page is the follow-up for Weymouth. The public number is the number the contractor quotes from.

No local contractor is named on this door for Weymouth yet. A request from this page goes to the first licensed shop that takes the door.

Where should the follow-up go?

We will follow up by email. No calls.

No spam, no sold information. One follow-up about exactly this request.