Humarock is part of Scituate, but its electricity comes from a different company than the rest of town. The state’s franchise map puts Humarock Beach on Eversource and most of Scituate on National Grid. Clement Boston Heat Pumps checks which one serves your address before planning heat pump installation in Scituate, MA, because it changes your winter rate.
The rest of the plan is set by the water: salt spray on the coil, wind off the ocean, and flood zones on low lots.
Which utility serves your house
For most Scituate homes, the answer is National Grid. On Humarock, it’s Eversource. Both run Mass Save, so the rebate amounts match; the winter rates don’t.
| Most of Scituate | Humarock Beach | |
|---|---|---|
| Electric company | National Grid | Eversource |
| Mass Save electric sponsor | National Grid | Eversource |
| Winter heat pump rate | Lower distribution charge | Lower distribution and transmission charges |
| Gas company, where there’s gas | Eversource Gas | Eversource Gas |
Both seasonal rates run November 1 to April 30 and apply to every kilowatt-hour in the house. Our electric rate guide explains enrollment, which is usually automatic for rebate recipients.
Salt spray and the outdoor unit
Salt air corrodes outdoor coils and fins faster than inland air. Massachusetts has no rule on placing a heat pump near salt water, so we follow manufacturers’ coastal guidance.
Where we put it
On the side of the house away from the prevailing onshore wind and out of direct spray. Not tucked under an eave, because rain rinsing the coil is what keeps salt from building up. Level on its stand, so defrost water drains away.
What we specify
Where exposure is high, a manufacturer’s coastal-protection coating on the outdoor unit. We note it on the estimate as its own line, so you can weigh it. Our placement guide covers stands and clearances.
What you do
Rinse the coil with fresh water a few times a year and touch up scratches on the cabinet. A yearly maintenance visit checks the coil, the fins and the electrical connections for corrosion.
Flood zones and raised equipment
Low lots along the harbor, the marshes and Humarock can sit in a FEMA flood zone. Where one applies, the state building code’s flood provisions put equipment above the design flood elevation.
We check the zone for your address on the first visit. If it applies, the outdoor unit goes on a raised platform or a wall bracket, and the air handler goes in the attic or a closet rather than a crawlspace. Line sets and wiring are routed to stay above the same line.
Cottages that became year-round homes
Some Scituate houses near the beaches started as summer cottages and were winterized later, often with electric baseboard. About 6% of Scituate homes heat with electricity.
Why baseboard is the easy case
A baseboard heater turns one kilowatt-hour into one unit of heat. A heat pump moves two to three for the same kilowatt-hour on a typical winter day, so the bill drops from the first month. Mass Save counts electric resistance heat as an eligible system to replace. See baseboard to heat pump.
Where the ducts go
A cottage with a low attic or no basement can take a compact air handler in a closet or a small attic, with short runs to each room. We measure the heat loss room by room first, because a winterized cottage often has uneven insulation.
Oil homes away from the shore
About 31% of Scituate homes burn oil, more than the state’s 22%. Many sit inland, in North Scituate, Greenbush and Egypt.
Furnace or boiler
If the furnace feeds ducts, we measure them and set the heat pump’s air handler in its place. If a boiler heats radiators, attic and basement air handlers bring new ducts, with closets that stack between floors carrying the trunk.
The tank
The tank comes out after the heat pump is carrying the house, and an accessible one falls in our $600 to $1,500 range. See oil to heat pump conversion and our heat pump vs oil guide.
Gas homes on Eversource Gas
Close to six in ten Scituate homes heat with gas from Eversource Gas. Its Mass Save gas program covers replacing that heat with a heat pump when the furnace comes out.
Gas is the cheapest fuel per unit of heat, so most gas owners switch when the furnace and the central AC are both near the end. One heat pump replaces the pair on the existing ducts, and a licensed gas fitter caps the line. See furnace to heat pump conversion.
Sizing for wind off the water
On an exposed lot, wind pushes cold air through every gap in the house, and the coldest nights often come with it. At Logan, the coldest design hours average winds near 16 mph from the northwest.
Counting the wind
Our room-by-room load calculation includes air leakage, and on an exposed Scituate lot that number carries more weight. Air sealing first, which Mass Save’s whole-home rebate asks for anyway, can shrink the system you need. Our sizing guide explains the method.
How long it lasts
A coastal unit that’s placed well, coated where needed and rinsed lasts far longer than one left in the spray. Our lifespan guide covers what shortens a heat pump’s life and what doesn’t.
Permits and code in Scituate
Scituate’s building department takes permit applications online. The town runs the stretch code and hasn’t adopted the specialized code.
| What | The Scituate answer |
|---|---|
| Permit route | Scituate Building Department, online applications |
| Energy code | Stretch code since July 1, 2011 |
| Electric utility | National Grid; Eversource on Humarock Beach |
| Rebate program | Mass Save |
| Flood zone | Checked per address |
| Noise limits | Confirmed per address |
The whole-home rebate needs cold-climate listed equipment, an installer in Mass Save’s network, the old system removed and proof of weatherization. Our rebate guide lists each tier.
The order of work on a coastal job
The coastal checks come first, because they decide where the equipment can go.
- First visit: utility check, flood zone, exposure to spray and wind, then the room-by-room load calculation, ducts and panel.
- Written estimate: equipment with its 5°F capacity, any coating or raised platform, duct work, electrical, permits, rebate path and price.
- Install: three to six working days, depending on ducts.
- Commissioning: nitrogen pressure test, vacuum below 500 microns, refrigerant charged by weight, airflow measured, backup heat lockout recorded.
Norwell shares Scituate’s National Grid service and the North River; Hingham runs its own light plant.