New AC or Heat Pump in Portland, ME: 2027 Installed Cost
Adjust your home size & electric cost in Portland, ME
Homeowners in Portland, ME replacing central air with a 14 SEER unit should budget $7,970 to $9,610 installed. We sized it at 3 tons, about 33,000 BTU, for a home of 1,680 sq. ft. At roughly 68,000 people, Portland is an average-cost market for Maine, so these figures equal the statewide estimate.
A clean replacement is what we priced: outdoor unit, indoor coil or air handler, refrigerant lines, wiring and removal of the old equipment. Duct repairs and electrical upgrades are separate line items on most bids.
Installed AC Prices in Portland, 14 to 20 SEER
Each step up in efficiency costs more in Portland. The entry 14 SEER system is $7,970 to $9,610; 16 SEER is $10,060 to $12,130; 18 SEER is $14,850 to $17,900; 20 SEER is $19,100 to $23,020.
Price by Rating: Portland and Statewide
| System (3 ton) | Portland | Maine average | Materials |
|---|---|---|---|
| 14 SEER | $7,970 - $9,610 | $7,920 - $9,550 | $5,020 |
| 16 SEER | $10,060 - $12,130 | $10,000 - $12,050 | $6,270 |
| 18 SEER | $14,850 - $17,900 | $14,750 - $17,780 | $9,120 |
| 20 SEER | $19,100 - $23,020 | $18,970 - $22,870 | $11,650 |
Split a Portland quote into parts and labor and the equipment side is about $5,020 for 14 SEER, $6,270 for 16 SEER.
Local Labor and the Portland Price
A contractor's costs follow the local economy: what the crew earns, what insurance costs and how long it takes to get to the job. A 16 SEER system here costs $10,060 to $12,130, the same as the Maine average.
Every Portland ZIP code we track, 11 of them in Cumberland County, uses the prices on this page. The cheapest bid is often the one that leaves out the permit, a new line set or duct sealing. Compare complete scopes, not headline prices.
Operating Cost and Payback for Portland Homes
Every cooling cost below starts from $0.463 per kWh, the Maine average and about 113% above the national average of $0.217. Maine electricity has climbed about 7.38% a year over the past decade, and the ten-year figures below assume that trend continues.
Each line is one SEER rating; touch or hover a year to read its dollar figures. The climb is the 7.38% yearly increase ME rates showed over ten years.
The first point applies ME's current rate to this season; every point after it adds another year of the 7.38% average increase. Dollar figures are rounded up to the next $10.
Our model runs the AC about 9.3 hours a day in season. On that basis a 1,680 sq. ft. home in Portland pays about $1,050 a year at 16 SEER and $1,860 at 9 SEER.
Upgrade Payback Finder: Your Old AC vs a New One
Pick the unit you have and the one you are considering. Figures are for a 3-ton system at Maine electric rates ($0.463/kWh, rising 7.38% a year).
| Installed price of the new system | $8,670 |
| Electricity saved, first year | $680 |
| Saved over 10 summers (rates rising) | $9,490 |
| Payback | 9.4 years |
| Net after 10 summers | +$830 |
Pays off: going from 9 to 14 SEER leaves you $830 ahead after 10 summers in ME.
Replacing a working unit: the whole install counts as the cost. If the old one has failed, weigh each rating against a 14 SEER quote instead.
Old 9 SEER vs New: Portland Numbers
| 9 SEER | 14 SEER | 16 SEER | 18 SEER | 20 SEER | |
|---|---|---|---|---|---|
| Installation Cost | - | $8,670 | $10,940 | $16,140 | $20,760 |
| Electric Usage / Yr | 4,001 kWh | 2,545 kWh | 2,263 kWh | 2,044 kWh | 1,868 kWh |
| Electric Cost / Yr | $1,860 | $1,180 | $1,050 | $950 | $870 |
| Energy Savings / Yr | - | $680 | $810 | $910 | $990 |
| Payback (Rates Rising) | - | 9.4 years | 9.7 years | 11.8 years | 13.1 years |
| 10-Year Net (Rates Rising) | - | $830 | $400 | -$3,390 | -$6,860 |
From a 9 SEER starting point, the quickest return in Portland comes from 14 SEER, about 9.4 years.
Buy Price vs Ten Years of Power in Portland
Buy Price vs 10-Year Running Cost: Total Cost of Ownership in ME
Three bars per rating: what it costs to install, what it costs to cool the house for 10 summers at Maine rates with the rate climbing 7.38% a year, and the sum. The rating with the shortest third bar costs the least to own. Tap or hover any bar to see the addition.
After 10 years, 14 SEER is the cheapest system to own in Maine: $25,250 all-in ($8,670 installed + $16,590 of electricity).
Energy inflation is built in: season one is priced at today's ME rate, and each of the nine seasons after it costs 7.38% more than the one before, the historic yearly increase. The install figure is the typical installed price on this page. Parts and totals are each rounded up to $10, so the parts may sum $10 above the total.
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What Portland Summers Ask of an Air Conditioner
Statewide numbers frame the Portland estimate: region 1 on our map, summer highs averaging about 79°F, and winter highs around 25°F. In Portland, the heating bill is the big one. Pick the cooling side for reliability and right sizing rather than maximum SEER.
Climate zones run from 1 (cool) to 5 (hot); Maine is in Zone 1.
In humid Portland weather, the AC is also a dehumidifier, and it only works as one when it runs long enough.
South Portland is the nearest guide city to Portland, roughly 2 miles to the southwest.
A backup heat source is still common advice in Portland, even with the newest cold-climate heat pumps. Square footage alone is a shortcut; a real load calculation for a Portland home counts windows, insulation, orientation and leakage.
Ducts, Access and Layout in Portland Homes
A forced-air furnace means the ducts are already there and adding central AC is simple. Radiator or baseboard heat, common in older Maine homes, means ducts or a ductless system must be priced in. Short drives and simple access help explain why Portland prices sit at or below the Maine average.
A ductless heat pump heats as well as cools, so it can replace old electric baseboard heat.
When Portland Installers Have Room
Replace an old system in spring or fall. Portland crews have open calendars then, and the house can go a day without heat or AC. A permit and inspection document that the Portland install meets code, which helps when the house is sold.
Elsewhere in Maine
Same 16 SEER system, other Maine cities:
- Lewiston, ME: $9,980 to $12,030, 30 mi north
- Bangor, ME: $9,960 to $12,000, 110 mi northeast
- South Portland, ME: $10,030 to $12,090, 2 mi southwest
If you live just outside Portland, in Westbrook, Scarborough, Old Orchard Beach, Freeport and Biddeford for example, expect bids close to these.
Statewide averages and the assumptions behind every estimate are in the Maine HVAC cost guide. Before collecting bids, run your own numbers in the AC size calculator and the heat pump calculator.
Modeled estimates, not quotes: equipment, duct condition, access and permit fees will move the final price.
Quick Answers
Figures below use Maine averages; energy prices as of October 2026.
Does a heat pump heat for less than natural gas in Maine?
Not in Maine at today's prices. Natural gas delivers 41,910 BTUs per dollar and a COP-3 heat pump 22,099. Power would need to fall under about 24.4¢ per kWh for the heat pump to win (the Maine average is 46.3¢), or the unit would need a higher COP.
Is electricity in Maine expensive compared with other states?
At 46.3¢ per kWh, Maine runs 113% over the national figure of 21.7¢, the 3rd most expensive among the 50 states and DC. Every AC and heat pump cost on this page moves with that rate.
Is a cold-climate heat pump needed in Maine?
Yes, plan on one. Winter lows in Maine average about 6°F statewide, where a standard heat pump loses much of its output. Cold-climate models keep heating below zero; size for the coldest nights.
What does a heat pump save over electric baseboard in Maine?
Roughly two-thirds of the bill at COP 3. With the Maine average at 46.3¢ per kWh, baseboard heat costs about $135.75 per million BTU and a heat pump about $45.25.
What is the best season to replace an AC or furnace in Maine?
Spring or fall, while the old system still runs. Winter lows near 6°F statewide mean heating work should wrap up by early fall. Crews are busiest in the first hot week and the first freeze, and a forced emergency swap leaves no time to compare bids.
Is it smart to replace the furnace and AC together?
When both are aging, generally yes: one visit, one labor charge, and a matched coil and condenser, which the efficiency rating assumes. If one is fairly new, price each job on its own.
Check it for your own home: Central AC cost estimator or Heat pump cost calculator.
More HVAC Cost Guides
Maine HVAC costs (statewide) · HVAC costs in every state
