
Ductless Mini-Splits in Auburn, Maine
No Ductwork Required · Zone-by-Zone Control · Whisper-Quiet Operation
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- Since 2019
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Ductless Mini-Splits for Auburn Homeowners

Aces Highlands handles ductless mini-splits for homeowners throughout Auburn. We work out of 508 Riverside St Unit 1 in Portland, a short drive into Androscoggin County, so response times stay quick and every job benefits from knowing the local housing stock and code requirements.
Ductless mini-split systems provide efficient heating and cooling without the need for ductwork. Aces Highlands installs single and multi-zone mini-split systems for homes that need targeted comfort in specific rooms or areas.
Mini-splits are ideal for additions, finished basements, garages, bedrooms over garages, and older homes without existing ductwork. Each indoor unit operates independently, giving you zone-by-zone temperature control and eliminating the energy waste of heating or cooling unoccupied rooms. If your home also needs new wiring to support the installation, we handle that too.
We install wall-mounted, ceiling cassette, and floor-mounted indoor units depending on your space and preferences. Each installation includes proper sizing, clean line routing, and thorough testing to ensure optimal performance.
Modern ductless systems operate at whisper-quiet levels and include features like programmable schedules, Wi-Fi control, and advanced filtration. We help you choose the right configuration for your home and budget. Explore our financing options to make your mini-split installation affordable.
Why Auburn Calls Aces Highlands
- We run trucks through Auburn and the rest of Androscoggin County routinely, not occasionally
- You get the real problem and a firm number, not a pitch for extras
- Scheduling that moves quickly, because a home without heat or water cannot wait
- Fully licensed, fully insured, and reviewed by real customers on Google
Auburn Homes and What They Need
Auburn's median home was built in 1954, with 38 percent of housing dating before 1940 and 57 percent before 1960 -- slightly older on average than Lewiston's stock, concentrated in the shoe- and mill-era neighborhoods that grew up after the city's 1848 rail connection went in. That vintage of housing is exactly where rewiring work tends to turn up knob-and-tube remnants and undersized panels.
Heating and Cooling in Auburn
About 51 percent of Auburn households heat mainly with fuel oil, 22 percent with utility gas, and 11 percent with electricity, per Census estimates -- though Auburn, like Lewiston, is not in Summit Natural Gas of Maine's published service area, so that utility-gas figure likely reflects an older local distribution setup. Either way, plenty of Auburn's oil-heated homes are good candidates for adding a heat pump alongside the existing system.

Getting to Know Auburn
Auburn once had one of the largest shoe industries in the country -- by 1917 the city's factories were turning out roughly 75 percent of the world's supply of white canvas shoes, before the industry faded after World War II. That manufacturing boom is a big part of why Auburn's older neighborhoods look the way they do today.
Auburn sits across the Androscoggin River from Lewiston, and the two cities share more than a border: they draw water together through the Auburn Water District, and the Little Androscoggin River cuts through Auburn as well. Auburn also runs its own municipal Electrical Department, which both maintains the city's traffic signals and streetlights and handles the city's electrical code inspections.
Local & Independent — Not a Franchise
Aces Highlands is a locally owned Portland, Maine company serving Auburn — not a national franchise. Nobody on our crew works on commission, so there is no incentive to sell you more than the job needs. We do the work you called us for, do it right, and earn the next call. That is the whole business model.
How a Ductless Mini-Split Works
- Outdoor condenser — compressor and fan reject or absorb heat
- Line set — refrigerant lines run through the wall sleeve
- Wall sleeve — one small penetration, no ductwork needed
- Indoor wall head — coil and blower
- Warm air — directed by adjustable louvers
Homeowner Guide
Ductless Mini-Splits: Zoning, Placement & Multi-Unit Systems
A ductless mini-split solves a specific problem — heating and cooling a space with no existing ductwork — and it does it with more control over individual rooms than almost any ducted system can offer.
Read the Full GuideMore Heat Pumps & Mini-Splits
Ductless Mini-Splits is part of our full heat pumps & mini-splits lineup. Explore the details or browse everything we offer in Auburn.
Ductless Mini-Splits DetailsAll Services in AuburnService Info
Codes & Permits for Ductless Mini-Splits in Auburn
In Auburn, plumbing permits come from the Local Plumbing Inspector at the Planning, Permitting & Code, City of Auburn (60 Court Street, Auburn, ME 04210 (Auburn City Hall), (207) 333-6600). With 24,061 residents, Auburn is required to enforce the Maine Uniform Building and Energy Code (MUBEC). Auburn's water utility (Auburn Water District, drawing on Lake Auburn) supplies both Auburn and Lewiston, and the city coordinates with the Lake Auburn Watershed Commission on development near the source lake.
- The electrical circuit that feeds a new heat pump or AC condenser needs an electrical permit, issued by the Electricians' Examining Board or the town's own electrical inspector, before the wiring is installed or altered. maine.gov
- Efficiency Maine offers rebates of up to $9,000 on qualifying heat pumps, but the equipment must be installed by an Efficiency Maine Residential Registered Vendor for the homeowner to receive the rebate. efficiencymaine.com
- Anyone who connects or disconnects gauges or adds/removes refrigerant on a heat pump or air conditioner must hold EPA Section 608 technician certification; the credential does not expire once earned. epa.gov
How Aces Highlands Handles Ductless Mini-Splits in Auburn
- Because roughly 51% of Auburn homes are already on heating oil, a ductless mini-splits usually means deciding how much of the heating load the new equipment should carry, not ripping out what's there.
- The circuit feeding the outdoor unit is permitted first, and all refrigerant handling follows EPA Section 608 rules — no shortcuts on either.
- We flag which Efficiency Maine incentives apply to a ductless mini-splits before work starts, since the rebate only applies through a Residential Registered Vendor.
The municipal government building for the city of Auburn, on Court Street near the Androscoggin River.
Street View © Google
Why homeowners choose Aces Highlands
We show up when we say
We show up on time, as promised, and complete the work with clean professionalism.
Pricing upfront, before work starts
Honest diagnostics and a clear price before any work begins — no surprises on the invoice.
Done right the first time
HVAC, plumbing and electrical done right the first time — backed by our workmanship guarantee and 100% satisfaction guarantee.
Locally owned in Portland, Maine · Serving Greater Portland and Southern Maine since 2019
What HVAC customers say
Adam Ayan
10 months ago
Elijah and Highlands Heating & AC were super helpful! Boiler failed over the weekend and Elijah was very responsive and helpful, getting us up and running right away. I would recommend him at HH&AC highly!
Justin Funk
a year ago
We highly recommend Highlands Heating & AC. They are extremely responsive, knowledgeable and do great work. Our boiler stopped working and Elijah was quick to respond after hours on a Friday. He installed a new boiler and heat pump hot water heater.
Tom
14 Aug 2024
He was very friendly. He gave me an honest explanation on why I shouldn't recharge my A/C unit and what he suggested made much more sense. He really took care of everything. He is very professional, always called me with updates. 5 stars is not enough — I give this company 10 stars.
John Walton
5 months ago
I've had three HVAC issues over the past two years. Each time I call, Elija or the office picks up the phone, and my problem is fixed in 24 hrs. Their solutions always feel correct and honest. I cannot recommend them more.
Christian van Loenen
4 months ago
Beyond impressed with Elijah and his team. Professional, communicative, and do great work. HIGHLY recommend. Thank you, Elijah!
Nichole A
a year ago
Highly recommend! Cannot thank them enough for fixing my water heater. Elijah is very reliable and communicative. No hassle, no phone tag, transparent with cost and quick to repair the issue. I know who to call if I need help again!
Ductless Mini-Splits FAQs
Can a mini-split heat a room all winter in Maine?
Yes — cold-climate mini-splits are rated to keep producing heat at -13°F and below, and Maine homes run tens of thousands of them through every winter. Correct sizing and mounting the outdoor unit above snow line are what make the difference.
How much does a ductless mini-split cost installed?
A quality single-zone installation typically runs $4,000–$6,000. Multi-zone systems cost more depending on the number of indoor heads. Efficiency Maine rebates on qualifying systems reduce the net cost, and we quote firm prices up front.
Are mini-splits noisy?
No — modern indoor heads run at whisper-quiet levels on low fan speeds, quieter than a refrigerator, and the compressor noise stays outside. If a mini-split is loud, something is wrong with it.
Do mini-splits need maintenance?
Yes: rinse the indoor filters every few weeks during heavy use, and have the system professionally cleaned and checked once a year — coils, blower wheel, refrigerant charge, condensate drain, and defrost operation.
How long does installation take?
A typical single-zone installation is finished in one day, including electrical connection and full commissioning. Multi-zone projects usually take two to three days.
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Radiant Floor Heating in AuburnNeed Ductless Mini-Splits in Auburn?
Call our Auburn team or get a free quote. We will get you scheduled and take care of it right the first time.
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