Cohasset · Heat Pumps
Weighing a heat pump for your Cohasset home? See how National Grid service, Mass Save, and the shoreline affect the project, then reach an independent local HVAC contractor.
Cohasset, Massachusetts
The first question for any Cohasset heat pump project is which utility stands behind the rebates, and here the answer is simple. Cohasset has no municipal light plant; National Grid's Massachusetts Electric company supplies the town's power, and National Grid is one of the sponsors of Mass Save. That makes Mass Save the program to check before you choose equipment.
There's a rate angle too. Cohasset Community Electricity, the town's electricity aggregation program, notes that starting November 1, 2025, most National Grid customers who heat with a heat pump receive a discounted heat pump delivery rate. Ask the contractor and National Grid whether your account qualifies, since running costs matter as much as the install.
The rest depends on the house. A tight 1970s home and a drafty prewar house with radiators need very different designs, and this page covers what to ask either way. A call or online request connects you with an independent HVAC contractor who works in Cohasset.
Planning a heat pump before an old system fails gives you time for an energy assessment, rebate approval, and a careful design instead of a rushed winter swap.
A heat pump heats and cools with the same equipment, which is often the selling point in Cohasset houses that never had central air.
A sunroom, finished attic, or addition that runs cold in January and hot in July is a natural first zone for a heat pump.
Heat pumps add electrical load. If your service panel is older or already full, an upgrade may come first, and it's better to learn that early.
Local knowledge
Utility, housing age, and the coast each change how a Cohasset heat pump should be planned.
Heat Pump Rate
Cohasset Community Electricity says most National Grid customers with heat pumps get a discounted heat pump delivery rate from November 1, 2025. Rate structures change, so confirm the current terms with National Grid when you compare heat pump running costs with oil or gas.
Source: Cohasset Community Electricity
Utility And Rebates
Mass.gov lists National Grid as Cohasset's electric company and National Grid's Boston Gas as its gas company. Both take part in Mass Save, which typically asks for a home energy assessment and specific equipment, so line those up before work begins.
Source: Mass.gov
Median Year Built
Census estimates put the town's median year built at 1968. Older walls, single-pane windows, and open attics raise heat loss, so a weatherization step before sizing can mean a smaller system that runs more comfortably.
Source: U.S. Census Bureau ACS
Flood Pathways
State coastal resilience grants have funded design work on flood pathways in the James Brook watershed, aimed at flooding in Cohasset Cove and Summer Street. If your lot is in that area or near the harbor, plan the outdoor unit's mounting height with flooding in mind.
Source: Town of Cohasset (archived page)
Right now
A little homework before the first site visit makes estimates easier to compare.
Mass Save offers home energy assessments, and many of its heat pump offers have assessment or weatherization requirements. Schedule one early so the results can shape the design.
Pull your oil deliveries or gas bills and your National Grid electric bills. Contractors use them to estimate heat loss, and you'll use them to judge running costs.
Some Cohasset owners replace their old system outright; others keep a boiler or furnace as backup for the coldest nights. Know which way you lean before quotes arrive.
Note where an outdoor unit could sit clear of roof runoff, drifting snow, bedroom windows, and any area that floods in storms.
What to expect
A careful contractor starts with a room-by-room heat loss calculation, then proposes either ducted equipment, ductless heads, or a mix. In houses without ducts, line sets and condensate lines have to travel through walls, closets, or the exterior, and the routing is worth discussing room by room.
Electrical work for the outdoor unit and any panel upgrade is inspected through Cohasset's Building and Inspections department, which also handles building permits. Its page, as archived in February 2026, said permits are filed electronically and inspections are arranged by contacting the office.
Installation itself often takes a few days for a whole house, longer if the panel needs work. Before the crew leaves, ask for a walkthrough of the thermostat or remote, the defrost cycle, and filter cleaning, and keep the commissioning paperwork for your rebate.
Hire smart
Massachusetts has no single HVAC license. Gas work needs a gas fitter license, oil burner work a Department of Fire Services certificate, ductwork a sheet metal license, and larger refrigeration systems a refrigeration technician license. Most heating and cooling installs need a town permit.
Ductwork calls for a sheet metal license, and electrical hookups need an electrician; both can be checked on the state's occupational license search. Ask who on the crew holds each one.
A number pulled from square footage alone isn't enough. Ask to see the heat loss calculation and the design temperature it assumes.
Get in writing which Mass Save offer the contractor expects, which equipment qualifies, and whether they or you submit the application.
Ask how the equipment performs on the coldest nights and whether your existing boiler or furnace should stay connected as backup.
Costs
Scope matters most: the number of zones or indoor heads, whether ducts exist, how far line sets must run, and whether the electrical service needs an upgrade. Prewar Cohasset homes often need more indoor units and more weatherization than newer houses of the same size.
Site conditions add to it. Raised stands, wall brackets, and coastal-grade coatings make sense near the water but add materials and labor. Ask each contractor for a written estimate that lists equipment models, labor, electrical work, permits, and the Mass Save offer they expect, then weigh those totals against the operating cost under your National Grid rate.
More help in Cohasset
Every page below is written for Cohasset homes. Or start from the Cohasset hvac guide.
Learning Center
Heating and cooling work in Massachusetts is split across several state licenses. Knowing which one matches your system is the fastest way to tell a qualified contractor from a risky one.
Read the guide
A heat pump proposal is only as good as the design behind it. These questions help you compare quotes, protect your rebate eligibility, and avoid a system that's the wrong size for your house.
Read the guideQuestions
Still not sure? Send a short request and a local pro can answer the specifics.
Cohasset Community Electricity reports that from November 1, 2025, most National Grid customers with heat pumps get a discounted heat pump delivery rate. Eligibility depends on your account and equipment, so confirm directly with National Grid before counting on it.
The aggregation program sets the supply side of your electric bill, while National Grid handles delivery. Both parts affect what a heat pump costs to run, so compare your supply rate and delivery rate when you estimate savings.
Often, yes, especially after air sealing and insulation. Some owners pair ductless heads with the existing boiler for the coldest days. A heat loss calculation tells you whether full replacement or a hybrid setup fits your house.
Cohasset's Building and Inspections department handles the building and electrical inspections. Your contractor usually files the permit online and arranges the inspection with the department.
Above expected flood levels, out of roof drip lines, and clear of drifting snow. A wall bracket or raised stand is common near the shore, and a contractor can suggest coastal coatings that slow corrosion from salt air.
Get connected
Share a few details and an independent local HVAC contractor who serves your town can follow up about the job. There’s no charge to use this site, and you decide whether to hire anyone.
Prefer to talk? Calling is the fastest way to reach a local HVAC contractor.
Call Now