
Furnace Installation in South Portland, Maine
High-Efficiency Models · Proper Sizing · Ductwork Inspection Included
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Furnace Installation for South Portland Homeowners

Need furnace installation in South Portland? Aces Highlands runs out of 508 Riverside St Unit 1 in Portland and covers Cumberland County routinely, which means a technician who already understands the area's homes and permit process shows up, not a stranger learning it on the job.
When it is time for a new furnace, Aces Highlands helps you choose and install a high-efficiency system that delivers dependable heat and lower energy costs. Every installation includes proper sizing, clean ductwork connections, and thorough testing.
We install oil, propane, and natural gas furnaces from trusted brands. Modern high-efficiency furnaces can operate at 95% efficiency or higher, meaning more of your fuel dollar goes toward heating your home instead of going up the chimney. You might also want to consider a heat pump system for even greater efficiency and year-round comfort.
Proper sizing is critical for furnace performance. An oversized furnace short-cycles and creates temperature swings, while an undersized unit runs constantly without reaching comfortable temperatures. We perform a load calculation to determine the right size for your home.
Our furnace installations include removal of the old unit, new furnace installation, ductwork inspection and connection, thermostat setup, and a complete system test. Older homes may also benefit from an electrical panel upgrade to support the new system. We make sure everything is working perfectly before we leave.
Why South Portland Calls Aces Highlands
- We run trucks through South Portland and the rest of Cumberland County routinely, not occasionally
- We tell you what is actually wrong and what it costs, plainly, every time
- Most calls get on the schedule the same week you reach out
- Licensed and insured, and reviewed by real customers on Google
South Portland Homes and What They Need
South Portland's housing is younger than Portland's but still old: census estimates put the median home at 1968, about a quarter of units date from before 1940, and roughly six in ten were built before 1980. A noticeable bump in the 1940s reflects the wartime shipyard years already noted on this page. About half of homes are single detached houses and about a quarter of units are in buildings of five or more apartments, and close to six in ten households own. The older grid neighborhoods such as Ferry Village, Knightville and Meetinghouse Hill hold modest capes and two-story houses on small lots, with later subdivisions filling in the rest of the city. Houses from the 1940s and 1950s can still have small 60- or 100-amp services, ungrounded circuits and galvanized supply lines, so plumbing work in a South Portland cape often turns up aging pipe once walls are opened.
Heating and Cooling in South Portland
Heating fuel in South Portland is close to a three-way split. Census estimates show about 38 percent of occupied homes on fuel oil or kerosene, about 34 percent on utility gas and about 18 percent on electricity, with bottled propane near 5 percent. Unitil's Northern Utilities serves the city, so gas is available on many streets but not all. The whole city sits on Casco Bay and the Fore River, and the Jetport runway is inside city limits, so the official Portland weather record is effectively local: January lows average in the mid-teens and nights at or below zero come about ten times a winter. Wind off the water drives heat loss in older, loosely built houses. Many owners of oil-fired homes are adding ductless mini-splits in South Portland to cut oil use while keeping the existing system for the coldest stretches.

Getting to Know South Portland
During World War II, South Portland's two shipyards built 266 cargo ships in just four years — 236 American Liberty ships plus 30 "Ocean" class vessels for Britain — with a workforce of roughly 30,000 that included thousands of women welders. The Liberty Ship Memorial near Bug Light Park marks the spot today.
That wartime boom is why South Portland has so much solid mid-century housing — homes built for shipyard workers and their families. Those same houses are now prime candidates for modern heat pumps, updated panels, and new water heaters, and we work in them constantly.
Local & Independent — Not a Franchise
Aces Highlands is a locally owned Portland, Maine company serving South Portland — 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 Furnace Works
- Return air — pulled in through the filter
- Blower — pushes air across the heat exchanger
- Burners — ignite to heat the exchanger
- Heat exchanger — transfers heat without mixing combustion gases
- Supply air — warm air delivered to the home
Homeowner Guide
Furnace Installation: Sizing, Ductwork & Venting
A furnace replacement is a chance to fix problems the original installation may have never addressed — most of which live in the ductwork, not the furnace cabinet.
Read the Full GuideMore Furnace Repair & Installation
Furnace Installation is part of our full furnace repair & installation lineup. Explore the details or browse everything we offer in South Portland.
Furnace Installation DetailsAll Services in South PortlandService Info
Service Area
South Portland, Cumberland County, ME
Phone
(207) 670-8616Hours
Open 24 hours, 7 days a week
Codes & Permits for Furnace Installation in South Portland
In South Portland, plumbing permits come from the Local Plumbing Inspector at the Code Enforcement Office, City of South Portland (829 Sawyer Street, South Portland, ME 04106, 207-767-7603). With 26,498 residents, South Portland is required to enforce the Maine Uniform Building and Energy Code (MUBEC). The city's Water Resource Protection Dept. is organized into Treatment Systems, Collection Systems, and Engineering divisions, and its service area (including a Coastal Resilience program) drains to the Fore River/Casco Bay.
- Oil-fired furnaces fall under the same Maine Fuel Board Oil Burner Technician licensing (Apprentice/Journeyman/Master) as oil boilers. maine.gov
- Installing, repairing, or servicing a propane or natural gas furnace requires a Maine Fuel Board Propane and Natural Gas Technician license, with separate authorizations depending on BTU size and scope of work. mainelegislature.org
- Propane and natural gas equipment and dispensing installations in Maine must comply with NFPA 54 (National Fuel Gas Code) and NFPA 58 (Liquefied Petroleum Gas Code). maine.gov
How Aces Highlands Handles Furnace Installation in South Portland
- Northern Utilities, d/b/a Unitil has mains through parts of South Portland, so a gas-fired swap is on the table wherever a line already reaches the street; off that grid the choice is oil, propane or a heat pump.
- About 38% of South Portland homes heat with heating oil today. Oil equipment is installed to NFPA 31, gas and propane to NFPA 54/58, and every vent or chimney tie-in to NFPA 211.
- We don't close out a furnace installation without confirming CO detectors are installed near sleeping areas, which Maine requires wherever the heat comes from burning fuel.
South Portland's municipal building on Cottage Road in the Meetinghouse Hill area.
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
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.
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!
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!
Jacqueline Vogeley
2 weeks ago
Great experience! Open, honest and efficient 🙌🏽 Job well done
Furnace Installation FAQs
How much does a new furnace cost installed?
Most residential furnace replacements run roughly $5,000–$9,000 installed depending on fuel type, efficiency class, and ductwork condition. We provide a firm written quote before ordering equipment, and financing is available.
How long does furnace installation take?
A straightforward replacement is completed in one day, with heat restored the same evening. Jobs involving significant ductwork, venting changes, or fuel conversion may take a second day.
What size furnace does my home need?
The size should come from a heat-loss calculation of your actual home — insulation, windows, air sealing, square footage — not from copying the old unit’s label. Oversized furnaces short-cycle and create temperature swings; undersized ones run constantly and still fall behind.
Should I replace my furnace with a heat pump instead?
Worth considering. Cold-climate heat pumps heat efficiently through most of a Maine winter and add air conditioning, and Efficiency Maine rebates may apply. Many homes pair a heat pump with a furnace as backup. We install both, so we can price the options against each other honestly.
Do you remove the old furnace?
Yes — removal and disposal of the old unit is included in every installation, along with a full cleanup of the work area.
More Services in South Portland
Aces Highlands handles HVAC, plumbing, and electrical for South Portland homeowners. Here is more of what we do nearby.
Furnace Repair in South Portland
Furnace Repair in South PortlandFurnace Maintenance in South Portland
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Leak Detection & Repair in South PortlandFixture Installation in South Portland
Fixture Installation in South PortlandDrain Cleaning in South Portland
Drain Cleaning in South PortlandSewer Line Repair & Replacement in South Portland
Sewer Line Repair & Replacement in South PortlandFurnace Installation in Nearby Towns
Need Furnace Installation in South Portland?
Call our South Portland team or get a free quote. We will get you scheduled and take care of it right the first time.
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