Worcester / Sterling
Sterling is about 12 miles from the Census center point for Worcester in a straight line and covers 30.616 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).
Sterling has 8,183 residents (give or take 23) (ACS 2020-2024 5-year, table B01003, https://data.census.gov/table/ACSDT5Y2024.B01003?g=060XX00US2502767385, checked 2026-10-19), about 267 people per square mile.
The quote form takes a ZIP code; for Sterling that is 01564 (Census 2020 ZCTA to county subdivision and ZCTA to place relationship files, ZIP areas at least 20% inside the town, https://www2.census.gov/geo/docs/maps-data/data/rel2020/zcta520/tab20_zcta520_cousub20_natl.txt and https://www2.census.gov/geo/docs/maps-data/data/rel2020/zcta520/tab20_zcta520_place20_natl.txt, checked 2026-10-19).
Sterling is spread out at 267 people per square mile across 30.616 square miles of land, so a long refrigerant line run between the outdoor unit and the farthest indoor head is the sizing question an installer checks first.
Of the 3,282 occupied homes in Sterling, 4% heat with natural gas, 66% with heating oil, 15% with electricity and 7% with propane (ACS 2020-2024 5-year, table B25040, https://data.census.gov/table/ACSDT5Y2024.B25040?g=060XX00US2502767385, checked 2026-10-19).
Sterling has 28 points more oil heat than Worcester County as a whole, where 38% of homes burn oil, and 5 points less electric heat than the county's 20% (ACS 2020-2024 5-year, table B25040, https://data.census.gov/table/ACSDT5Y2024.B25040?g=050XX00US25027, checked 2026-10-19).
Heating oil is the largest single fuel in Sterling at 66%, ahead of electricity at 15%, so the usual job here is an oil boiler or furnace coming out and a cold-climate heat pump going in, with the oil tank removed.
The median Sterling home was built in 1980 (ACS 2020-2024 5-year, table B25035, https://data.census.gov/table/ACSDT5Y2024.B25035?g=060XX00US2502767385, checked 2026-10-19) and the median home has 6.8 rooms (ACS 2020-2024 5-year, table B25018, https://data.census.gov/table/ACSDT5Y2024.B25018?g=060XX00US2502767385, checked 2026-10-19).
Sterling has 3,309 housing units, 13% built before 1940 and 50% before 1980, with 24% built in 2000 or later (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=060XX00US2502767385, checked 2026-10-19).
Sterling has 14 points fewer pre-1940 homes than Worcester County as a whole (27%) and 9 points more homes built after 2000 than the county's 15% (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=050XX00US25027, checked 2026-10-19).
82% of Sterling homes are single-family detached, 6% are in two- to four-unit buildings and 4% are in buildings of five or more units (ACS 2020-2024 5-year, table B25024, https://data.census.gov/table/ACSDT5Y2024.B25024?g=060XX00US2502767385, checked 2026-10-19).
With 82% detached houses and 6% in small multi-family buildings, a Sterling quote is usually one or two outdoor units with ducted or ductless heads sized room by room. With 14% of Sterling homes rented (ACS 2020-2024 5-year, table B25003, https://data.census.gov/table/ACSDT5Y2024.B25003?g=060XX00US2502767385, checked 2026-10-19), the landlord signs the quote in many of them.
Sterling has 25 points more detached houses than Worcester County overall (57%) and 13 points fewer five-plus-unit buildings than the county's 17% (ACS 2020-2024 5-year, table B25024, https://data.census.gov/table/ACSDT5Y2024.B25024?g=050XX00US25027, checked 2026-10-19).
Only 14% of Sterling homes are rented (ACS 2020-2024 5-year, table B25003, https://data.census.gov/table/ACSDT5Y2024.B25003?g=060XX00US2502767385, checked 2026-10-19), so nearly every quote here is the resident talking to the installer directly, and the rebate goes to the person living in the house.
Sterling is also on the state table of towns served by a municipal light plant, Sterling Municipal Light Department (Massachusetts municipally-owned electric companies, https://www.mass.gov/info-details/massachusetts-municipally-owned-electric-companies, checked 2026-10-19).
Mass Save heat pump rebates are for electric accounts with Cape Light Compact, Eversource, National Grid or Unitil, so a Sterling home billed by Sterling Municipal Light Department asks the plant for its heat pump rebate instead.
Mass Save whole-home heat pump rebate, run by Mass Save, is a live program for Massachusetts addresses and publishes its terms without one headline figure (registry row 1 verified 2026-10-14, https://www.masssave.com/residential/rebates-and-incentives/heating-and-cooling/heat-pumps, checked 2026-10-16); confirm eligibility for the Sterling address before counting it. With 15% of Sterling homes already on electric heat and 77% on gas, oil or propane, the row that applies depends on the name on the electric bill and the fuel coming out.
Median household income in Sterling is $129,063 (ACS 2020-2024 5-year, table B19013, https://data.census.gov/table/ACSDT5Y2024.B19013?g=060XX00US2502767385, checked 2026-10-19); many state and utility heat pump rebate programs set higher incentive tiers for income-qualifying households, so the household income on the application, not the town median, decides which level applies.
Heating design temperature: -2F. Source: ENERGY STAR Design Temperature Limit Reference Guide (2019 Edition), Worcester 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 -2F figure is the Worcester County cold-day number a Sterling heat pump is sized against, so ask the installer to show the system's heating output at -2F, not at the milder rating-label temperature.
Ask what happens to the oil tank, since 66% of the 3,282 occupied Sterling homes have one and removal is usually a separate line on the quote.
Ask for the heat-loss calculation room by room; the median Sterling home has 6.8 rooms and was built around 1980, 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 Sterling. The public number is the number the contractor quotes from.
No local contractor is named on this door for Sterling yet. A request from this page goes to the first licensed shop that takes the door.