Heat Pump Replacement & Upgrades
in Kittery, Maine
Professional heat pump replacement for Kittery 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 Kittery home to a modern, high-efficiency system. We serve York 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 Kittery Point, Kittery Foreside, and Badger's Island and throughout Kittery 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 Kittery, learn more about heat pump replacement & upgrades, or call (207) 317-1077 to schedule a free in-home estimate.
Replacing Aging Heat Pumps and Oil Systems in Kittery
A common Kittery replacement scenario looks like this: an oil boiler still handling most of the house, paired with an older mini-split installed years ago to cover one room, now losing output or needing frequent service. With 60.2% of Kittery households heating mainly on oil, that combination is common, and a replacement project is often the right moment to decide whether heat pumps should take over the full season instead of staying a single-room supplement.
We start with an inspection of the existing equipment and line set rather than assuming anything about the old system's sizing was correct. Lines that pass a pressure test and are properly sized for new equipment can usually be reused, saving wall and siding repairs; lines that are corroded, kinked or undersized get replaced. Our heat pump replacement and upgrades page walks through that process, and we service every brand of equipment, not just systems we installed ourselves.
New equipment installed today generally runs on lower-impact A2L refrigerants such as R-454B rather than the R-410A common in older units, following the AIM Act's technology-transition restrictions on newly manufactured equipment that took effect January 1, 2025; a September 2025 EPA proposal to soften the installation cutoff for existing R-410A stock remains unfinalized, so we tell every Kittery homeowner plainly which refrigerant a given piece of equipment uses.
For a replacement aimed at Efficiency Maine's whole-home rebate, the heat pumps need to carry the home as primary heat for the entire season, sized for at least 80% of the calculated load, with any oil or propane system kept strictly as emergency backup. Because Unitil serves parts of Kittery with piped gas, a household with an existing gas account isn't eligible for that rebate even after switching off gas heat. Any new or altered circuit still needs an electrical permit; Kittery's Code Enforcement Department issues these directly for a $30 base fee, with compliance certified by the installing electrician's signed affidavit rather than a named field inspector. For replacement work just north, see our York replacement page.
Sources: U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates (Table B25040, Kittery); Town of Kittery, Code Enforcement Department; Town of Kittery, Wastewater Treatment; Town of Kittery, Shoreland Property Owner Information; Kittery Water District; Unitil, electric & gas service areas (archived); Maine Public Utilities Commission, regulated electric utility contacts; Kittery, Maine (Wikipedia).
Heat Pump Replacement & Upgrades Codes & Permits in Kittery
What Maine law and Kittery's own code office require before any work begins.
Permitting authority
Electrical inspection & utility
Kittery's Code Enforcement Department issues electrical permits directly, certified by a signed compliance affidavit from the installing licensed electrician. 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 Kittery still touches the electrical circuit in most cases, so we schedule the inspection with Kittery Code Enforcement Department ourselves. We also confirm your address never held a natural-gas account before assuming any Efficiency Maine rebate applies.
Google Street View — Fort McClary State Historic Site
Kittery at a Glance
Mixed 1940s-1980s housing
Primary heating fuel (ACS 2020-2024)
Oil is still the #1 heat source in Kittery — the clearest signal that a heat pump conversion beats the cost of another winter of deliveries.
Trusted Heat Pump Replacement & Upgrades in Kittery
Maine's oldest incorporated town and its southernmost, Kittery pairs some of the region's oldest housing stock with Piscataqua River salt air, calling for cold-climate systems built to last. Our Kittery 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 Kittery Point or Kittery Foreside, we deliver comfort you can count on.
What We Offer
Every heat pump replacement in Kittery 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 Kittery 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 Kittery Homeowners Choose Us
Trusted across York 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 Kittery
Kittery was incorporated in 1647, making it the oldest incorporated town in Maine, and its Portsmouth Naval Shipyard on Seavey's Island — established in 1800 as the U.S. Navy's first federal navy yard — has anchored the local economy for more than two centuries. Badger's Island saw some of the first vessels built for the Continental Navy during the Revolutionary War, including the USS Ranger under John Paul Jones.
Nearly a quarter of Kittery's homes predate 1940 and almost half predate 1960, giving the town the oldest housing stock among our York County service area. Fuel oil heats over 60% of homes here, the highest share of any town we serve, which is exactly the profile where a properly sized heat pump conversion delivers the biggest visible drop in a winter fuel bill.
Kittery Heat Pump Replacement & Upgrades FAQs
When should I replace my heat pump in Kittery?
If your Kittery 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 Kittery?
In many Kittery 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 Kittery?
Yes. Modern high-efficiency heat pumps installed in Kittery 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 Kittery
Nearby Communities We Serve
Ready for Heat Pump Replacement & Upgrades in Kittery?
Schedule your free in-home consultation today. We will assess your Kittery 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.