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Top-Rated Air conditioning pros in Cos Cob - Updated Nov 2026

Avatar for AC Air Duct Cleaning
AC Air Duct Cleaning
5.0(
30
)
Air Ducts & Vents - Clean

Serving Cos Cob, CT and surrounding areas

Approved

Super Service Award Winner

In business since 2020

Free estimates

Emergency services offered

"The assigned technician, John, was on-time, knowledgeable, provided suggestions, and thorough. Oftentimes, people don’t realize how important this service is. If I were you, I would book AC Air Duct cleaning!"
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+29

Response time7 hrs
Response rate100%
1 neighbors recently requested a quote
Avatar for Petro Home Services
Petro Home Services
4.4(
1,786
)
Central A/C - InstallCentral A/C - Install - For BusinessCentral A/C - Service or Repair+3 more

Serving Cos Cob, CT and surrounding areas

Approved (Corporate)

In business since 1903

Emergency services offered

Warranties offered

"One of the best contractor experiences we have ever had. Jim called the day before to confirm the appointment. Larry the Plumber was so nice to deal with. He put on she covers to protect my wood floors, worked very neatly and gave us some tips about ongoing maintenance. He did a perfect job. This review us for Petro in central NJ. i was not able to change the company location. We hired them through Amazon."
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Response time6 days
Response rate100%
18 neighbors recently requested a quote
Avatar for Clean Air Dream Team Inc.
Clean Air Dream Team Inc.
4.8(
38
)
Air Ducts & Vents - Clean

Serving Cos Cob, CT and surrounding areas

Approved

Super Service Award Winner

In business since 2021

Emergency services offered

Warranties offered

"We had a great experience with Clean Air Dream Team! They did a very good job cleaning our air ducts and removing the black mold from our vents. They were professional, thorough, and made sure the job was done properly. We’re very happy with the results and would definitely recommend Clean Air Dream Team to anyone who needs their air ducts cleaned. Andre was great!"
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+17

Response time1 day
Response rate100%
3 neighbors recently requested a quote
Avatar for Duct Pro, LLC
Duct Pro, LLC
4.9(
47
)
Air Ducts & Vents - Clean

Serving Cos Cob, CT and surrounding areas

Approved

In business since 2005

Free estimates

Customers say: Quick response

"Ralph and Mike were both very pleasant. Work was done fairly quickly. Only concern was Ralph quoted me a price to complete additional work (some insulation) but work was not done as I was later told by Ralph that it was not needed and we then had to renegotiate a new price after the initial quote. He did however complete other work which was identified by Mike as being needed and work was done well. Overall I think they were reasonable and did a good job. One central air unit and two bathroom fans cleaned for $450."
Response time7 hrs
Response rate100%
Recommended by100%of homeowners
Avatar for Hillcrest Fuel, Inc.
Hillcrest Fuel, Inc.
4.6(
75
)
Central A/C - InstallDuctless Mini-split A/C - Install or Replace

Serving Cos Cob, CT and surrounding areas

Approved

In business since 1938

Free estimates

Emergency services offered

"They were great! Even found a way of adding a 40 gallon water heater to a smaller space. Which has been wonderful! They worked in a VERY tight space and got the job done! I highly recommend them! Will be using them to install my central air as well!"
Fujitsu Heat A/C Heat Pump
American Standard Air Conditioning
95% Alpine Boiler Nat Gas
Burnham X2 Gas Boiler
Burnham X2 Gas Boiler

+1

Response time1 day
4 neighbors recently requested a quote
Recommended by100%of homeowners
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Air Conditioning FAQs, answered by experts

The best way to compare HVAC quotes is getting a few detailed quotes from local companies with good reputations. Then, go over the quotes line by line. Protect yourself by insisting on in-person estimates that include equipment manufacturer names, model numbers, SEER ratings, amounts and numbers of materials, details of warranties on equipment and labor, and other specifics. 

Knowing the exact equipment and materials is the only way that you can fairly compare quotes. Quotes that are much lower than others can be a sign that the company isn’t providing the best quality service or materials.

Yes, HVAC zoning systems offer energy savings by allowing precise temperature control in different zones in your home. Rather than conditioning the whole house uniformly, these systems direct airflow where needed, preventing energy waste. Tailoring comfort to specific areas reduces energy consumption and lowers utility costs, making HVAC zoning an energy-efficient choice.

An HVAC unit, like a furnace, air conditioner, or heat pump, produces warm or hot air. The air ducts serve as the passages to help heat or cool air from the HVAC unit flow through the home. Air ducts are just one part of the overall HVAC system.

Whether an HVAC damper should be open or closed depends on the season, the zone it controls, and the temperature in that zone. In the summer, open upstairs dampers and close lower-level dampers to get the most efficient cooling possible. In the winter, do the opposite. Cool air will naturally flow down to lower levels, while warm air will rise. This keeps your system from working harder and helps prevent common AC problems.

AC leaks are common, and an HVAC pro can usually fix them. You may be able to resolve some leaks on your own, but a professional HVAC technician should handle most AC leak repair. If left ignored, an AC leak could cause serious damage to your system or leave you with expensive water damage, usually leading to more costly repairs or replacements.

The Cos Cob, CT homeowners’ guide to air conditioning services

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