Heat Pump Replacement & Upgrades
in Brunswick, Maine
Professional heat pump replacement for Brunswick homes and businesses, backed by Efficiency Maine rebate assistance and 30+ years of experience.
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How a Heat Pump Works
- Outdoor unit — fan and compressor extract heat from outside air, even in cold weather
- Reversing valve — switches the system between heating and cooling
- Line set — carries hot, high-pressure refrigerant indoors
- Indoor coil — releases heat into the airstream
- Warm air — the blower delivers it to the room
If your heat pump is aging, losing efficiency, or breaking down, Southern Maine Heat Pumps can upgrade your Brunswick home to a modern, high-efficiency system. We serve Cumberland County with complete replacements, from removing and recovering refrigerant out of your old equipment to installing today's far more efficient cold-climate models and completing every rebate form.
Homeowners in downtown Brunswick, Brunswick Landing, and Cooks Corner and throughout Brunswick are surprised how much quieter and more efficient new systems run compared to units from even a few years ago. Where possible we reuse existing line sets to keep your upgrade affordable.
Looking for the full picture? Explore all of our heat pump services in Brunswick, learn more about heat pump replacement & upgrades, or call (207) 317-1077 to schedule a free in-home estimate.
Upgrading Brunswick Boilers, Baseboard and Older Heat Pumps
A Brunswick replacement project usually begins from one of three places: an oil boiler near the end of its service life, a run of electric baseboard in a newer apartment or addition, or an early mini-split that no longer keeps up. Each calls for a different conversation. The Census Bureau American Community Survey (2020–2024) lists electricity as the main heat in about 13% of local homes, and because that figure includes baseboard as well as heat pumps, a good number of households already heat electrically while paying resistance-heat prices for it.
Swapping baseboard for cold-climate heat pumps can cut electric use sharply, since a heat pump moves heat from outdoors instead of making it from scratch. For oil or propane homes, the existing boiler or furnace does not have to leave the basement. Under Efficiency Maine's whole-home rules as of mid-2026, it may stay strictly as emergency backup while the heat pumps carry the heating season. Dual-fuel setups that switch between the two automatically are not eligible for that rebate.
Natural gas changes the math in Brunswick more than in most towns we serve. The whole-home rebate excludes any housing unit that held a natural-gas utility account before the upgrade, so a gas-heated house can still move to heat pumps but should plan around per-unit and other incentives instead. We check this with you at the estimate, not after the equipment is on the wall. Program terms can change — check efficiencymaine.com.
Newer buildings are part of the picture too. Roughly 27% of Brunswick's housing went up after 2000, and some of those homes and apartments may have been built with electric baseboard or a small propane furnace because it was inexpensive to install at the time. Replacing that equipment with a ducted or ductless heat pump is usually simpler than in an older house, since the walls are insulated and the wiring is modern, but we still check the electrical panel for capacity before new equipment is ordered.
When an older heat pump comes out, the copper line set inside the wall may be reusable, but not until it has been examined and has held test pressure without loss. A line that fails that test, or that does not match what the new unit's manufacturer calls for, gets replaced. We service all heat pump brands, not only systems we installed, so if your current unit simply needs attention, heat pump repair may be the right first step. See our full approach to heat pump replacements and upgrades, or read how the process plays out for heat pump replacement in Harpswell.
Sources: Census Bureau American Community Survey (2020–2024), 5-year estimates; Efficiency Maine, Residential Heat Pump Rebate brochure (June 2026); Maine Public Utilities Commission, natural gas distributors and service areas; Federal Street Historic District (Brunswick, Maine); Brunswick, Maine: geography and history; The Maine Monitor, Maine's energy code and climate zones.
Heat Pump Replacement & Upgrades Codes & Permits in Brunswick
What Maine law and Brunswick's own code office require before any work begins.
Permitting authority
Electrical inspection & utility
Brunswick's Planning & Codes Office issues electrical permits directly and requires a licensed Maine electrician for the work. Electric service runs on Central Maine Power (CMP).
Refrigerant rules
EPA Section 608 of the Clean Air Act (40 CFR Part 82, Subpart F) prohibits intentionally venting refrigerant while installing, maintaining, servicing, repairing or disposing of heat pump or air-conditioning equipment, and requires technicians who handle refrigerant to hold Section 608 certification.
Ventilation code
The 2021 IECC (adopted by MUBEC) caps whole-building air leakage at 3 air changes per hour at 50 pascals for climate zones 3-8 — Maine sits entirely within zones 5-7 — tested via a blower-door test. Combined with ASHRAE 62.2's mechanical ventilation requirement for new construction, this is why many new Maine homes need a dedicated ERV or HRV for code-required fresh air.
What heat pump replacement & upgrades specifically requires
- A like-for-like condenser swap still requires an electrical permit if the circuit, disconnect or wiring is touched.
- Replacement installs completed after January 1, 2025 fall under the AIM Act's Technology Transitions restrictions on newly manufactured high-GWP refrigerant equipment, though EPA has weighed extending the R-410A sell-through window.
How Southern Maine Heat Pumps Handles It
Swapping an old heat pump for a new one in Brunswick still touches the electrical circuit in most cases, so we schedule the inspection with Planning & Codes Office, Town of Brunswick ourselves. We also confirm your address never held a natural-gas account before assuming any Efficiency Maine rebate applies.
Google Street View — Union Street, mill district
Brunswick at a Glance
Mixed 1940s-1980s housing
Primary heating fuel (ACS 2020-2024)
Oil is still the #1 heat source in Brunswick — the clearest signal that a heat pump conversion beats the cost of another winter of deliveries.
Trusted Heat Pump Replacement & Upgrades in Brunswick
Brunswick combines a vibrant downtown with sprawling neighborhoods near the old base, and heat pumps modernize heating across all of them. Our Brunswick customers choose Southern Maine Heat Pumps for clean workmanship, honest pricing, and systems sized precisely for their homes.
Every project is backed by full Efficiency Maine rebate assistance and our commitment to quality. Whether you are in downtown Brunswick or Brunswick Landing, we deliver comfort you can count on.
What We Offer
Every heat pump replacement in Brunswick is customized to your home, your goals, and the Southern Maine climate.
Comprehensive old system removal
Upgrade to latest high-efficiency models
Reuse existing line sets when possible
Updated electrical and mounting as needed
Complete Efficiency Maine rebate paperwork
Proper refrigerant recovery and disposal
Our Brunswick Replacement Process
From first call to final walkthrough, here is what to expect when you choose Southern Maine Heat Pumps.
System Assessment
We evaluate your current system, identify inefficiencies, and recommend the best replacement options for your needs.
Upgrade Planning
We design the replacement around your existing infrastructure, reusing components where possible to reduce cost.
Old System Removal
We safely remove and dispose of your old equipment, recovering refrigerant in compliance with EPA regulations.
New System Installation
We install your new high-efficiency system with fresh connections, updated wiring, and secure mounting.
Performance Verification
We test the new system thoroughly, compare performance to the old unit, and handle all rebate documentation.
Why Brunswick Homeowners Choose Us
Trusted across Cumberland County for expert heat pump replacement and exceptional service.
Restore peak heating and cooling performance
Lower energy bills with modern efficiency ratings
Quieter operation than older units
Improved cold-weather heating capability
Fresh manufacturer warranty coverage
Maximized rebates and incentive savings
Replacing an Aging Heating System With a Heat Pump
Most replacement projects start with a system that's aging out — an oil furnace nearing 20 years, electric baseboard that's become expensive to run, or an early-generation heat pump that never quite handled a Maine winter well. The upgrade decision usually comes down to three questions: replace like-for-like, go all-electric, or keep something as backup.
Read the full guide
Efficiency Maine
Rebates & Guidance
- Rebate
A replacement qualifies the same as a first-time install
Trading in an old heat pump, or moving off oil, propane, or electric baseboard entirely, taps the identical rebate scale as a brand-new project: $3,000 to $9,000 on a ducted system, or $1,000 to $3,000 per outdoor condenser on a mini-split, all scaled by income tier.
Source: Efficiency Maine - Recommendation
The old furnace doesn't have to go anywhere
A fair number of our replacement customers make the heat pump their day-to-day system and leave the old oil or propane furnace sitting there for an especially cold stretch or an outage. That choice doesn't change the rebate math on the heat pump side one bit.
Source: Efficiency Maine
Program details as of Sep 26, 2026. Rebate amounts and eligibility change; confirm current terms at efficiencymaine.com.
Getting to Know Brunswick
Brunswick is home to Bowdoin College, founded in 1794 and alma mater of Hawthorne, Longfellow, and Civil War hero Joshua Chamberlain. Harriet Beecher Stowe wrote much of Uncle Tom's Cabin while living in Brunswick in the early 1850s, and the former Naval Air Station has been reborn as Brunswick Landing, one of Maine's fastest-growing business and housing campuses.
That history gives Brunswick an unusually wide housing mix — Federal-era homes near the college, mid-century neighborhoods off Cooks Corner, and brand-new units at the Landing. Heat pumps serve all three, from single-zone retrofits in older homes to whole-building systems in new construction.
Brunswick Heat Pump Replacement & Upgrades FAQs
When should I replace my heat pump in Brunswick?
If your Brunswick heat pump is over 10 to 15 years old, needs frequent repairs, struggles to keep up on cold days, or your energy bills are climbing, it is usually worth replacing. We will give you an honest assessment during a free in-home visit.
Can you reuse my existing line set when upgrading in Brunswick?
In many Brunswick replacements we can reuse the existing refrigerant line set and mounting, which lowers cost. We inspect everything first and only reuse components that meet manufacturer specifications.
Will a new heat pump lower my bills in Brunswick?
Yes. Modern high-efficiency heat pumps installed in Brunswick carry significantly better efficiency ratings than older units, so most homeowners see lower heating and cooling costs along with quieter, more reliable operation.
What Our Customers Say
Here's what homeowners across Southern Maine say about the work.
“Nate did a nice, professional job cleaning and servicing our heat pump. We recommend and will use them again.”
Justin Spear
August 2026
“I had neglected annual service out of fear that it would cost a fortune but when I called to make the appointment, they let me know what was included in service and the cost- amazing! I appreciated that they were willing to service the system even though they did not do the installation.”
Ben Winkler
April 2026
“I contacted Southern Maine Heat Pumps to service my two units. The technicians who came out to service our heat pumps did an outstanding job. They were very thorough and helpful. They did a way better job than what I have experienced before with other maintenance services.”
Matt Heer
March 2026
“The technician arrived right on time, diagnosed the issue quickly, and had both of my heat pumps running smoothly in no time. They explained everything clearly and didn’t try to upsell unnecessary services — just honest, quality work. The price was fair, and the customer service was exceptional.”
Sarah McKay
November 2025
“I was being serviced by another local company as I had a crack in my Daikin Drip Pan. The previous company came out 3 times and finally diagnosed it. They ordered the part and then never showed up again even though the part was under warranty. I found Southern Maine on a google search and gave them a call. Sam called my back immediately.”
Big Pappa
August 2025
“Steve and Nate do an amazing job. I have been using this company for 5 years for heat pump cleaning, highly recommended.”
Sandra McKinney
November 2025
More Heat Pump Services in Brunswick
Nearby Communities We Serve
Ready for Heat Pump Replacement & Upgrades in Brunswick?
Schedule your free in-home consultation today. We will assess your Brunswick home, recommend the right system, and walk you through every rebate and financing option available.
Call us directly at (207) 317-1077 or fill out the form to get started.