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TRUSTED BY OLD SAYBROOK, CT HOMEOWNERS

  • Average homeowner rating star icon4.6
    Average homeowner rating
  • Verified reviews icon127
    Verified heating and air conditioning services reviews

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

Avatar for Onofreo Home Comfort Systems, LLC
Onofreo Home Comfort Systems, LLC
4.9(
38
)
Gas Furnace / Forced Air Heating System - InstallOil Furnace / Forced Air Heating System - InstallHeat Pump - Install or Replace+5 more

Serving Old Saybrook, CT and surrounding areas

Approved

In business since 2018

Free estimates

Small jobs welcome

"There were some issues when system was first installed. A lot of "pipe knocking" and radiators not heating up. This being a hundred-year-old house I could understand the problems. After speaking with their excellent customer service team, the service crew returned and resolved all issues! I plan on using Onofreo Home Comfort Systems for all my HVAC needs in the future."
Gas Furance
Ductless Heat Pump Installation
New Navien System
Old Oil Furance
Ductless Heat Pump Installation

+27

Response time1 day
Response rate86%
80 neighbors recently requested a quote
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 Old Saybrook, 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
Select Mechanical Services, Inc.
4.5(
58
)
Gas Furnace / Forced Air Heating System - InstallHeat Pump - Install or ReplaceOil Furnace / Forced Air Heating System - Install+38 more

Serving Old Saybrook, CT and surrounding areas

Approved

In business since 2014

Emergency services offered

Credit card accepted

With over 30 years of experience in the HVAC business, we are the experts you need to take care of your home or business. We handle everything from 24/7 emergency service to full installations and change outs. We will treat your home as we would treat our own. Give Select Mechanical Service a call today, we look forward to working with you!

Response time1 day
86 neighbors recently requested a quote
Recommended by90%of homeowners
Avatar for Everclean Air LLC
Everclean Air LLC
4.8(
44
)
Air Ducts & Vents - Clean

Serving Old Saybrook, 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
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+2

Response time7 hrs
Response rate100%
6 neighbors recently requested a quote
Avatar for Y & M Airduct Service
Y & M Airduct Service
4.9(
143
)
Air Ducts & Vents - Clean

Serving Old Saybrook, CT and surrounding areas

Approved

In business since 2017

Free estimates

Credit card accepted

"Matt and Harvey were professional and very clean. Two of our neighbors hired them to clean their HVAC ducts and dryer vents. We will have them back and refer to our family and friends."
Airduct
Airduct
Airduct
Airduct
Response time8 hrs
88 neighbors recently requested a quote
Recommended by97%of homeowners
Avatar for Green Air Duct Services
Green Air Duct Services
4.6(
116
)
Air Ducts & Vents - Clean

Serving Old Saybrook, CT and surrounding areas

Approved

In business since 2008

Free estimates

Emergency services offered

We are a locally owned and operated company, with over a decade of experience. We pride ourselves on the quality of our work, as well as our commitment to outstanding results. We look forward to building lasting relationships with our clients, and guarantee your satisfaction.

Before and after
Before and after
Before and after
Before and after
Before and after

+29

Response time5 hrs
Response rate96%
Recommended by89%of homeowners
Avatar for 888-I-DO-DIRT
888-I-DO-DIRT
4.5(
381
)
Air Ducts & Vents - Clean

Serving Old Saybrook, CT and surrounding areas

Approved

In business since 2004

Free estimates

Credit card accepted

"Excellent experience. Arrived when he said he would, quickly assessed the problems, did a quality job with both dryer vent repairs and a thorough cleaning. He did all that at a very fair price. Highly recommend him for HVAC and dryer vent cleaning and repairs."
Sample Cleanings
Sample Cleanings
Sample Cleanings
Sample Cleanings
Sample Cleanings

+11

Response time4 hrs
4 neighbors recently requested a quote
Recommended by97%of homeowners
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Heating and Air Conditioning FAQs, answered by experts

The DOE is phasing out AC units with SEER ratings that fall below 14 or 15. The exact minimum rating depends on your region. In the northern United States, new ACs must have a minimum SEER rating of 14, though you can still buy and install older systems as long as they were compliant when they were manufactured. In the southern and southwestern United States, you cannot buy or install older air conditioners with lower SEER ratings. The minimum rating is between 14.5 and 15, depending on the power of the unit.

Freon will go in the refrigerant lines near the back of your AC unit. Look for small ports with caps on a thin copper line—the Freon goes into those ports. You are best off hiring a licensed HVAC professional who can complete the job safely and correctly.

To find a reputable HVAC company, start by researching providers in your area. Look for companies with mostly positive online reviews and check the Better Business Bureau’s website for customer complaints. Next, verify their credentials. Rule out any companies that aren’t licensed, as this is a requirement in some states and municipalities, and confirm they are insured. Once you have a shortlist, contact each professional to ask key questions: How many years of experience do you have? Do you hold any third-party certifications? Do you have experience working on my specific type of HVAC system or brand? Can you provide references? What is your per-hour pricing? Do you offer maintenance contracts for ongoing savings? Do you provide a warranty for your work?

Yes, adding central air can increase your home value by as much as 10%. Generally speaking, prospective buyers prefer a central AC system over a ductless system or room-by-room AC units. That’s because central air conditioning blends into the home easier than individual room air conditioners and typically has less equipment to maintain.

A 3-ton AC unit is probably too big for a home that’s 1,200 square feet. If you have a 1,200-square-foot home, you likely need a unit that’s somewhere around 1.9 and 2 tons. An AC unit that’s too large will be really inefficient and cost you a lot of extra money on your bills. 

The Old Saybrook, 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.