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Top-Rated Air conditioning pros in Durham - Updated Nov 2026

Avatar for Heat Pumps of Maine
Heat Pumps of Maine
4.8(
17
)
Ductless Mini-split A/C - Install or Replace

Serving Durham, ME and surrounding areas

Approved

In business since 2021

Free estimates

Warranties offered

"Cam did a great job doing the installation and explanation of the heat pump. He also took care of registering the heat pump so everything was taken care of for us. The rebate from the state was also taken care of and deducted from our bill so we only paid the price of the heat pump with the rebate included. This is a big advantage because you are not paying the extra $2,000 for the bill and then waiting to get the $2,000 back from the state which could take weeks. They did a great job."
Heat Pump
Heat Pump
Heat Pump
Heat Pump
Response time1 day
Recommended by85%of homeowners
Avatar for Northwoods HVAC
Northwoods HVAC
5.0(
6
)
Central A/C - InstallCentral A/C - Service or RepairDuctless Mini-split A/C - Install or Replace+1 more

Serving Durham, ME and surrounding areas

Approved

Free estimates

Warranties offered

Small jobs welcome

"Josh installed a new water heater, provided us with instructions on proper use and maintenance and has serviced it since. He is honest, thorough, and trustworthy. He also maintains my dad’s HVAC needs too. He has come out for emergency calls too. Suggest things to prevent future additional repair expenses. His prices are reasonable, especially for the personal, friendly customer service and service provided. I would highly recommend Northwoods HVAC."
Avatar for Able Trades
Able Trades
5.0(
8
)
Ductless Mini-split A/C - Install or Replace

Serving Durham, ME and surrounding areas

Approved

In business since 2005

Free estimates

Warranties offered

"They were super helpful and the staff was so nice I recommend Able Trades to everyone they installed 2 heat pumps in my home and they are amazing iam so thankfull"
New Gloucester Home
New Gloucester Home
New Gloucester Home
New Gloucester Home
New Gloucester Home

+1

Response time1 day
Response rate100%
3 neighbors recently requested a quote
Heritage Home Service
4.8(
5
)
Central A/C - InstallDuctless Mini-split A/C - Install or Replace

Serving Durham, ME and surrounding areas

Approved (Corporate)

In business since 1988

Credit card accepted

Heritage Home Service is a premier home service provider operating in New Hampshire, Massachusetts and Southern Maine. Bringing all the perks that come with having a large team while maintaining a strong focus on family-oriented service. \n \nOur namesake is about honoring those who came before us, and most importantly, it is about leaving a legacy of serving people extraordinarily well. \n \nFor over 37 years in business, we have helped countless families across our community stay comfortable and healthy in their homes, and today we continue to evolve and find new ways to serve you even better.

122 neighbors recently requested a quote
Avatar for The Golden Rule Handyman, LLC
The Golden Rule Handyman, LLC
4.4(
32
)
Window A/C Unit - Service or Relocate

Serving Durham, ME and surrounding areas

Approved

In business since 2013

Free estimates

Emergency services offered

"Fabulous communication ,and work. I live out of state, and each time that work has needed to be done The Golden Rule Handyman has been on time and very professional . One of the few companies that is excellent in all phases of the business world. I highly recommend this company !"
Response time2 days
Recommended by96%of homeowners
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Air Conditioning FAQs, answered by experts

The size window AC you need depends on the BTU and the size of the room you’re cooling. For a room with 8-foot ceilings, look for about 20 BTU per square foot of the room. For example, a 12-by-12-foot room should have an air conditioner with 2,880 BTU. You can buy something slightly more powerful, but don’t overshoot the BTU for a small room, or you’ll waste energy and have higher bills.

If you’re planning an AC replacement, choosing an AC with a higher SEER rating may save you money in the long run. Tax credits could cover as much as 30% of the job, and you’ll notice smaller utility bills (particularly if you live in a hot climate where you need to constantly run the AC). Generally, you can expect to pay between $350 and $1,500 for each SEER rating increase. Weigh the cost against your typical utility bill to figure out what’s worth it to you.

Many HVAC manufacturers provide warranties that encompass the cost of a new compressor, with durations ranging from 5 to 10 years, depending on the brand. These warranties cover critical components such as the compressor, condenser, connecting tubing, evaporator, and refrigerant charge. Moreover, they often include the necessary labor for replacement or repairs. Keep in mind that premium-brand compressors may offer lifetime warranty options. It's essential to note that these warranties rarely cover labor costs.

While personal preferences widely vary, sleep experts say the best temperature for sleeping is between 60 and 67 degrees Fahrenheit rather than 78. If you do choose to sleep with your AC unit tuned to 78 degrees, you might want to use only a sheet or light blanket rather than a comforter. You might also consider installing a window unit in your bedroom so that you can be cooler in bed without wasting energy cooling the whole house.

Window ACs use 500 to 1,400 watts per hour of electricity, while mini-splits use 500 to 700 watts per hour. However, if you need to cool multiple zones in your house, your mini-split can use as much as 2,000 watts per hour. How often you run your system will impact how much electricity you use (and how much you pay per month).

The Durham, ME homeowners’ guide to air conditioning services

From average costs to expert advice, get all the answers you need to get your job done.