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TRUSTED BY MYSTIC, CT HOMEOWNERS

  • Average homeowner rating star icon4.4
    Average homeowner rating
  • Verified reviews icon158
    Verified heating and air conditioning services reviews

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

Avatar for Scotti Mechanical Services
Scotti Mechanical Services
4.7(
63
)
Central A/C - Service or RepairDucts & Vents - Install or ReplaceCentral Air Cleaner - Repair or Service

Serving Mystic, CT and surrounding areas

Approved

In business since 2020

Free estimates

Emergency services offered

"I feel fortunate to have been able to meet Chris and have him fix my HVAC issues. He was prompt, excellent at communicating, and also is a great listener. The cost of my service wasn't low due to what was needed but it was more affordable than other quotes I'd recieved; some of the others who had spoken to me on the phone were indicating rates that were 50% higher than what Chris charged for the same exact product! I'll gladly hire him for future work. I've already given his number to others with HVAC needs."
Response time5 hrs
14 neighbors recently requested a quote
Recommended by85%of homeowners
Bill Aitken Heating, LLC
4.8(
47
)
Electric Furnace / Forced Air Heating System - InstallHeat Pump - Install or ReplaceElectric Furnace / Forced Air Heating System - Repair+11 more

Serving Mystic, CT and surrounding areas

Approved

In business since 1990

Free estimates

Credit card accepted

"Bill called me first thing in the morning (7:30) after I sent out a request very late the night before. I had one others HVAC contracter make two trips to my home but could not figure out the problem? Bill had two of his tecknisions come out that morning but the problem still eluded them. The next day Bill came to my house and within 10 minutes he had it figured out. He explained exactly what the problem was and got my furnace up and running at 100%. He called back that night to check with me and make sure. Everything was OK."
6 neighbors recently requested a quote
Recommended by87%of homeowners
Avatar for Everclean Air LLC
Everclean Air LLC
4.8(
44
)
Air Ducts & Vents - Clean

Serving Mystic, CT and surrounding areas

Approved

Super Service Award Winner

In business since 2023

Free estimates

Emergency services offered

"I wanted to clean a second floor dryer vent hose that was loaded solid with lint. It was worse than I thought! Packed solid! It became evident that this was a messy and dangerous situation as it was a fire hazard. Through Angi I found Everclean and the co. was a perfect fit. HVAC companies don’t do dryer vents. Justin from Everclean was awesome and got the problem straightened out. He even discovered the dryer vent had become disconnected from outside dryer vent door! I can’t fit through the narrow attic hatchway as my shoulders are a bit too wide, so I depended on Justin. Finally, everything is buttoned up, and our clothes now dry in half the time. Cost was moderate and was money well invested. Dryer vent fire danger is now negligible compared to before. Along with neighbor hatred danger. I would hire Everclean again if needed again."
Additional Photos
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Additional Photos

+2

Response time7 hrs
Response rate100%
6 neighbors recently requested a quote
Avatar for 888-I-DO-DIRT
888-I-DO-DIRT
4.5(
381
)
Air Ducts & Vents - Clean

Serving Mystic, CT and surrounding areas

Approved

In business since 2004

Free estimates

Credit card accepted

"Alex was great! Courteous, responsive, prompt, friendly, but more importantly, honest. The job couldn’t be done because of the structure of my HVAC system, yet Alex (and Vinny) took the time to explain the problem and tried, albeit unsuccessfully, to seek an alternative solution. I have such respect for his honesty. I highly recommend using this company, for that reason alone."
Sample Cleanings
Sample Cleanings
Sample Cleanings
Sample Cleanings
Sample Cleanings

+11

Response time4 hrs
4 neighbors recently requested a quote
Recommended by97%of homeowners
Avatar for Atlantic Water Heater Pros
Atlantic Water Heater Pros
4.8(
51
)
Gas Boiler or Radiator Heating System - Install

Serving Mystic, CT and surrounding areas

Approved

In business since 1998

Free estimates

Emergency services offered

"Bruce really listened to how I answered his questions and designed a natural-gas fueled steam boiler system that met all the requirements with the expansion potential I requested. During pre-installation logistics and the day of installation, Bruce and his crew were on-time, courteous and professional. Their work demonstrated the benefits of hiring a fully credentialed company, skilled and experienced at their craft. They completed their work in one very long day so that I could avoid a night without heat during a stretch of very cold January days. I trust Williams & Assoc. and would hire them for additional work in my home as needed"
Large Mechanical Room
Response time1 day
1 neighbors recently requested a quote
Recommended by92%of homeowners
Avatar for Pro Services
Pro Services
4.8(
152
)
Air Ducts & Vents - Clean

Serving Mystic, CT and surrounding areas

Approved

Super Service Award Winner

In business since 2002

Free estimates

Emergency services offered

"The technician, Steve, called me 25 minutes prior to his arrival. He was extremely knowledgeable about my gas fireplace. He vacuumed all areas. He informed me of the condition of the components. I was prepared to ask him a handful of questions that he was able to answer. My fireplace works very well and I strongly recommend using the Chimney Experts."
Chimney Cap Installation
Smoke chamber before
Chimney Sweep Project
Fireplaces Project
Chimney Sweep Project

+36

Response time4 days
Response rate100%
47 neighbors recently requested a quote
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Heating and Air Conditioning FAQs, answered by experts

The standard rule for return duct sizing is that the return vent should be the same size or larger than the supply vent. This will ensure balanced airflow in your home and reduce strain on your HVAC system.

Yes, you can clean your air conditioner filter as a temporary fix for cleaning up dirt, but you’ll eventually need to replace it once the dust starts to accumulate. Use a vacuum with a hose attachment to clean your air filter at least once per year or more often if you have pets.

Replacing an HVAC system does not always include new ductwork. The decision depends on the condition of your existing ducts. If they are in good shape, correctly sized for the new unit, and meet current standards, they can often be reused. However, if the ducts are damaged, poorly designed, or improperly sized, they will likely need to be replaced or upgraded to ensure the new system operates efficiently. An HVAC contractor will assess your ductwork and recommend the best course of action. Typically, ductwork is purchased separately, and a full replacement will add to the overall project cost.

It’s never a good idea to run your AC without a filter, even just for a night. The filter defends your HVAC system from the dust, dirt, debris, and other grime in your home. Without a filter, those contaminants are more likely to get inside your system and potentially damage it. 

The general rule of thumb for figuring out how much AC tonnage you need in your home is that for every 500 to 600 square feet of space you need to cool, you’ll need one ton of AC cooling power. So, a 1,000-square-foot home will need 2 tons of AC power. 

The Mystic, CT homeowners’ guide to heating and air conditioning services

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