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Best heating and air conditioning pros near Castine, ME

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Top-Rated Heating and air conditioning pros in Castine - Updated Nov 2026

Avatar for MAC Heat Pumps
MAC Heat Pumps
4.6(
33
)
Heat Pump - Install or ReplaceDuctless Mini-split Heating System - Install or ReplaceHeat Pump - Install or Replace - For Business+3 more

Serving Castine, ME and surrounding areas

Approved

In business since 2011

Free estimates

Warranties offered

"The crew sent was on time, professional, friendly, efficient, clean and organized. The electrician was the first to arrive and installed the new breakers to the panel and installed the wire for the condenser unit and the wall mounted blowers. The crew installed two power head blowers, one for a large sunroom and another for the living room. The heat pumps are nearly silent yet powerful enough to do the entire first floor of our 3000 sq foot home. The entire install was done in one day and we were thrilled with the result. The estimator who came out took pictures and helped decide what the best options were according to our wishes and needs. This is what this company specializes in and they have it down to a science."
Maintenance
Maintenance
Maintenance
Maintenance
Maintenance

+36

Response time1 day
Response rate93%
4 neighbors recently requested a quote
On The Hill Plumbing LLC
New to Angi
Heat Pump - Install or Replace

Serving Castine, ME and surrounding areas

Approved

In business since 2025

Free estimates

Credit card accepted

We take great pride in our experience, expertise, quality, and customer service that we provide to meet the consumer's needs. It is our mission to provide excellent workmanship and complete customer satisfaction, from the start to the completion of a project. In order to understand the needs and expectations of our customers, we take great care to work and communicate with every customer in a professional manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job.

Response time2 days
8 neighbors recently requested a quote
Avatar for Aeroseal and Home Performance
Aeroseal and Home Performance
4.2(
33
)
Air Ducts & Vents - Clean

Serving Castine, ME and surrounding areas

In business since 2017

Free estimates

Small jobs welcome

"I called David Athas for a quote to get a dryer vent installed. He called me back the same day and set an appointment for the next day. He arrived on time and gave me several different options on where I could install the vent. He recommended someone to do the plumbing. Both men were professional, on time and completed the work as promised. I would recommend David 100% Vent and ductwork do not come up as an option as to job done, which is why I had to pick handyman however David is in fact a HVAC vent and duct professional."
Insulation/vapor barrier
Insulation/vapor barrier
Insulation/vapor barrier
Insulation/vapor barrier
Insulation/vapor barrier

+13

Response time2 days
Recommended by87%of homeowners
Avatar for octagon-restoration
octagon-restoration
4.7(
96
)
Air Ducts & Vents - Clean

Serving Castine, ME and surrounding areas

In business since 2002

Free estimates

Emergency services offered

"I called Octagon the day after we had an upstairs water leak. The next day, Octagan had scheduled a technician to assess the damage and set up the mitigation solutions to dry out the damage before mold could set in. Everyone from Octagon was friendly, professional and very responsive. If you need a fast, reliable and effective response, you will find it with Octagon!"
Water extraction.
Octagon vehicles
Drying structure damaged by water.
MOLD REMEDIATION
Dirty air duct.

+2

Response time6 hrs
Response rate100%
Recommended by90%of homeowners
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Heating and Air Conditioning FAQs, answered by experts

You should flush your AC drain line once every three months to keep it clear of debris and buildup. Keeping your AC drain line clean prevents clogs, backups, mold growth, and extra wear on your AC unit. If you live in a humid area or have several furry pets, up your cleaning schedule to once a month.

The best way to reduce heat upstairs is to release it by opening a window. Hot air rises, and if you can create some airflow by opening a window upstairs and also one on a lower level, the hot air should be pushed out of the home. Remember that fans pointing out the window do a much better job of circulating air than fans pointing into the home.

A blocked return air vent can cause your HVAC system to work much harder and, therefore, less efficiently. The result is higher utility bills and poorer air quality. A blocked return air vent can also cause unpleasant dust, dander, and odors to linger in your home’s air.

Yes, you can clean AC coils yourself. Just make sure that the power to your AC system is off before you begin. You’ll need some basic tools and supplies, including a soft brush, cloth, screwdriver, and a commercial or homemade cleaning solution. Cleaning your coils will only cost about $10.

Here’s how AC professionals will clean your AC coils:

  1. Unplug the AC unit or turn off the breaker to the unit in your circuit breaker box.

  2. Remove the faceplate.

  3. Spray a vacuum hose attachment or compressed air can to remove debris, dust, dirt, and grime.

  4. Use a soft-bristled fin comb to remove stubborn caked-on debris.

  5. Use the vacuum hose to suck up any extra debris.

  6. Take a coil-safe cleaning solution and spray it onto the coils. Try to choose a no-rinse solution.

  7. Let the solution sit for at least 15 minutes.

  8. Gently wipe away loosened grime and debris with a microfiber cloth.

  9. Reattach the faceplate, plug in your AC system, or turn the breaker back on.

The Castine, ME homeowners’ guide to heating and air conditioning services

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