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Best heating and air conditioning pros near Guilford, CT

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TRUSTED BY GUILFORD, CT HOMEOWNERS

  • Average homeowner rating star icon4.6
    Average homeowner rating
  • Verified reviews icon268
    Verified heating and air conditioning services reviews

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

Avatar for Tyler Heating, Air Conditioning and Refrigeration LLC
Tyler Heating, Air Conditioning and Refrigeration LLC
4.6(
132
)
Central A/C - InstallElectric Furnace / Forced Air Heating System - InstallBoiler or Radiator Heating System - Install or Replace+47 more

Serving Guilford, CT and surrounding areas

Approved

In business since 1994

Free estimates

Emergency services offered

"Have gotten to know Tyler AC over the past few years when our previous HVAC guy retired. Techs Chris & Jeff have been knowledgeable and responsible keeping our aging system running. Jen & Cinda in the office have always been super helpful. Jeff spent time here last summer milking along our AC system in very HOT weather. We spent time a few months back with a technician deciding what our needs were when repairs to our heating system were mounting. The office helped us figure out the best way to move forward, hooked us up with a home energy audit in order to qualify for rebates, etc. We chose our new system, they ordered it and the installation date was set. They said it would take 2-3 days to compete the install. As of today, it is done. 2 1/2 days. Hot, humid, heat wave days and the 2 guys worked hard. We are presently enjoying our nice cool home while watching Lord of the Rings - The Fellowship of the Rings."
Carrier Ductless Heat Pump Condenser
Carrier Performance Ductless Heat Pump High Wall Air Handler
Additional Photos
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Additional Photos

+172

Response time2 days
Response rate100%
4 neighbors recently requested a quote
Avatar for Onofreo Home Comfort Systems, LLC
Onofreo Home Comfort Systems, LLC
4.9(
38
)
Oil Furnace / Forced Air Heating System - InstallGas Furnace / Forced Air Heating System - InstallHeat Pump - Install or Replace+5 more

Serving Guilford, CT and surrounding areas

Approved

In business since 2018

Free estimates

Small jobs welcome

"I hired Onofrio to replace my gas furnace and install a new AC unit. A few months later when I had a minor gas leak in the pipes (unrelated to their install), they came out within a few hours to fix the leak. What REALLY impressed me was how they came to bat for me when the gas company initially said that it could be as long as next day to turn my gas back on after the repair. This was during the coldest days of the winter and I was very grateful that Onofrio stayed invested in me until everything was remedied."
Gas Furance
Ductless Heat Pump Installation
New Navien System
Old Oil Furance
Ductless Heat Pump Installation

+27

Response time1 day
Response rate86%
67 neighbors recently requested a quote
Avatar for Cawiamca Heating, Cooling, and Electrical
Cawiamca Heating, Cooling, and Electrical
5.0(
96
)
Central A/C - InstallOil Furnace / Forced Air Heating System - InstallElectric Furnace / Forced Air Heating System - Install+41 more

Serving Guilford, CT and surrounding areas

Approved

Super Service Award Winner

In business since 2014

Free estimates

Emergency services offered

"Exceedingly STELLAR work; BEYOND professional decorum elicited by the company’s OWNER AND staff MEMBERS (specifically the technicians that performed the installation). Overall, we HIGHLY recommend this company to neighbors, family, friends, coworkers & even strangers in our community that may be in need of any HVAC or others services for their homes and/or businesses. Financially, they were on par with our anticipated costs for the work we needed done. FAST, QUALITY WORK that we’d NEVER hesitate calling on again for any future needs that this EXCEPTIONAL, ‘5-star worthy’ company provides! Thank you especially to Ron, Carlos and Brandan… we truly enjoyed meeting you and the pleasure of your company while you worked diligently in our home was all ours. Perhaps this review seems “over the top”or contrived, but we truly wanted to reward this company properly with a review that sufficiently and congruently matched their “talk with the walk” behavior. As you (a co-consumer) know there are so few these days that that elicit good, old- fashioned business ethics. We want you to know this was honestly a job TRULY well done!"
Variable Refrigerant Flow Cold Weather Heat Pump in East Lyme
VRF Cold Weather Heat Pump in Groton
Additional Photos
Additional Photos
Response time8 hrs
29 neighbors recently requested a quote
Recommended by92%of homeowners
Avatar for MTL Heating & Cooling
MTL Heating & Cooling
4.7(
142
)
Central A/C - Service or RepairDuctless Mini-split Heating System - Install or ReplaceGas Boiler or Radiator Heating System - Install+17 more

Serving Guilford, CT and surrounding areas

Approved

In business since 2008

Free estimates

Emergency services offered

"Excellent service. Very prompt. Called Mike and he came out within a hour. Mike is very experienced, having dealt with many HVAC companies, these guys are tremendous. New exactly what was wrong and fixed it like a professional. Cost was better than I even expected. Forget the others and call MTL. Iâ ll be using them from now on."
 Viessman boiler oil to gas conversion Orange
Peerless oil boiler/Amtrol indirect water heater
 Navien Boiler oil to gas conversion Stratford
Day & Night gas furnace New Haven
 Peerless gas boiler West Haven

+4

Response time8 hrs
Recommended by98%of homeowners
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 Guilford, 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
19 neighbors recently requested a quote
Recommended by85%of homeowners
Avatar for Everclean Air LLC
Everclean Air LLC
4.8(
43
)
Air Ducts & Vents - Clean

Serving Guilford, 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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+2

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

Serving Guilford, 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
92 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 Guilford, CT and surrounding areas

Approved

In business since 2008

Free estimates

Emergency services offered

"Seems the basic cleaning does not work well for my situation. Noticed lots of loose dust ball around opening of vents right after service is done. The promotion price is good. But feel the work to replace missing dryer cap is expensive. Technicians are helpful and knowledgeable."
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
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Showing 1-10 of 267
Heating and Air Conditioning FAQs, answered by experts

Traditional central air conditioning systems require ductwork to circulate air throughout the home. Alternatively, you can add air conditioning with a mini-split ductless air conditioning system, which can be just as energy efficient as a central air conditioner. This type of system consists of two units–an outside unit that holds the compressor and condenser and an indoor unit that holds an air-handler. With multi-zone ductless systems, there are multiple indoor air handlers tied to a single outdoor compressor/condenser, allowing the system to cool multiple rooms.

The length of an AC cycle depends on the settings in your thermostat and the unit you have. Central AC doesn't constantly run at full blast the way that a window unit does. A cooling cycle in most homes is 15 to 20 minutes. Then, the unit stays off for seven to 10 minutes to circulate the cold air in the house before the cycle repeats. It should repeat two or three times per hour. A short cycle lasts less than 10 minutes and then turns off.

During the summer, it’s best to set your AC to 78 degrees when you’re home and awake, according to the Department of Energy (DOE). For better energy efficiency, raise the temperature slightly to 85 degrees while you’re out of the house. The National Sleep Foundation advises lowering your thermostat to between 60 and 67 degrees when you’re asleep.

An AC drip pan may stop draining if there’s a clog where the drip pan connects to the drain line. Clogs can form from a lack of cleaning or from rust or corrosion buildup. Cleaning the drip pan at least once per month lowers the chances of debris clogging the drain line.

They can, but it’s not as common. Window AC units are much smaller than whole-house systems and less likely to develop refrigerant leaks or similar issues. As a result, you will rarely need to add a new refrigerant, limiting overcharging problems. However, it’s still important to leave refrigerant management in the hands of professionals when window units need work.

The Guilford, 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.