Maine HVAC Service
An outdoor central air conditioning unit mounted on a concrete pad beside a blue-sided house at sunset.

AC Installation in Farmington, ME

Tell us about the house, and a licensed contractor who covers Franklin County will get in touch.

Tell us about the job

It takes about a minute.

Step 1 of 3: Equipment
An outdoor air conditioning condenser unit positioned on a concrete pad next to a blue-sided house, surrounded by green shrubs and flowering hydrangeas at sunset.

Farmington summers barely ask for air conditioning

Summer afternoons here average 73°F. Most days, that's cool enough that a home doesn't need mechanical cooling to stay comfortable. When you do want it, for a stretch of hot days or a muggy night, the unit isn't working against much.

If you're installing new, any central air conditioner built since 2023 has to meet a federal minimum of 13.4 SEER2. In a place with such a short, mild cooling need, you don't have to size or spend for a harsh climate. You're covering the occasional hot day, not fighting a long, punishing summer.

73°F
the average summer afternoon it cools against
9 hail events
in ten years, and hail bends the fins on outdoor coils
13.4 SEER2
the federal minimum any new unit must meet
Isometric cutaway illustration of a small house showing interior rooms, ductwork, an indoor air handler, and an outdoor condenser unit connected by lines, on a plain white background.
Your air conditioner works hardest from July through August.

NOAA nClimDiv, 1991–2020 normals

Aerial view of a residential air conditioning condenser unit mounted on a concrete pad next to a house with vinyl siding and a sliding glass door.

Going above the federal minimum saves little here, about $10 a year.

  • A higher-efficiency unit$60 a year
  • A new unit at the federal minimum, 13.4 SEER2$70 a year

Estimates for a typical Franklin County home, from EIA household energy data, Maine fuel prices and NOAA climate normals. Your home will differ.

What size air conditioner does my house need?
The right size comes from a load calculation, not a guess based on square footage. A contractor measures your square footage, your windows, your insulation, and your ceiling height, then runs the numbers to find the tonnage your house actually needs. An oversized unit cools the air fast but shuts off before it pulls the moisture out, so rooms feel damp. An undersized one runs constantly and still can't keep up on the hottest afternoons. With summer highs here averaging around 73°F, cooling loads stay modest, which is one more reason to size off a real calculation rather than a rule of thumb.
Should I replace the whole system or just the outdoor unit?
If your indoor coil and outdoor unit were matched and installed together, and the coil is still in good shape, replacing just the outdoor unit can work. But the two have to be compatible in capacity and refrigerant type, and an old coil paired with a new condenser often won't hit the efficiency or performance the new unit is rated for. A contractor can check your coil's condition and confirm whether it will pair properly with a new outdoor unit before you decide. New central air conditioners installed since 2023 have to meet a 13.4 SEER2 minimum, so that's the baseline any new outdoor unit will carry.
Do HVAC contractors in Farmington need a state license to work on my home?
Yes. HVAC work on your home has to be done by a licensed contractor, and it's worth asking to see that license before any work starts. Licensing means the contractor has met the state's requirements for training and passed the exams tied to this trade. It also gives you recourse if something goes wrong with the installation.
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