Top-rated heating and air conditioning pros.

Get matched with top heating and air conditioning pros in Cos Cob, CT

There are 32 highly-rated local heating and air conditioning pros.

TRUSTED BY COS COB, CT HOMEOWNERS

  • Average homeowner rating star icon4.2
    Average homeowner rating
  • Verified reviews icon231
    Verified heating and air conditioning services reviews

Find Heating and air conditioning pros in Cos Cob

Avatar for Sila Heating, Cooling and Plumbing

Sila Heating, Cooling and Plumbing

4.49(
856
)
Approved Pro

Sila Heating, Cooling and Plumbing

4.49(
856
)
Approved Pro
Customers say: Super punctual
348 local quotes requested
36 years of experience

Live Your Most Comfortable Life with a Company You Trust. We offer Same Day Service and Next Day Installation! Sila has been the center of delighting homeowners since 1989, with our team of engineers, certified technicians, and system designers that are proud to deliver the highest level of expertise in the HVAC industry. Whether it’s a repair, replacement, installation, or service, we have an unwavering commitment to keeping you and your family comfortable and safe — season after season. We guarantee satisfaction and are proud to have earned over 7,000 “A” ratings on Angie’s List and its prestigious Super Service Award!

"Did a great job"

Susan S on March 2025

Live Your Most Comfortable Life with a Company You Trust. We offer Same Day Service and Next Day Installation! Sila has been the center of delighting homeowners since 1989, with our team of engineers, certified technicians, and system designers that are proud to deliver the highest level of expertise in the HVAC industry. Whether it’s a repair, replacement, installation, or service, we have an unwavering commitment to keeping you and your family comfortable and safe — season after season. We guarantee satisfaction and are proud to have earned over 7,000 “A” ratings on Angie’s List and its prestigious Super Service Award!

"Did a great job"

Susan S on March 2025


Avatar for J Thurston Fuel

J Thurston Fuel

5.00(
3
)
Approved Pro

J Thurston Fuel

5.00(
3
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
141 local quotes requested

J. Thurston Fuel is a full-service fuel delivery company owned and operated by Jim Thurston and Jay Carter. Established in 1998, we service customers in New Haven and Fairfield counties and is one of the premier home heating oil distributors in the state. J. Thurston Fuel is devoted to satisfying the needs and wants of our customers. Our services range from heating oil & propane delivery, new equipment installation and equipment repairs. We are committed to providing the highest quality fast, efficient service, competitively priced to all our customers we serve. From our delivery drivers, to our office staff and service technicians, our employees are friendly, knowledgeable ready to assist you in saving energy and money regarding all your home services needs.

"Very accommodating to my schedule. Everything neatly done . The final copper work looks like a piece of art. These people know what they are doing make no mistake about that. If you want the best hire this company. They are very knowledgeable and answer all of your questions. They are very easy to work with every step of the way for your project"

Carole O on September 2025

J. Thurston Fuel is a full-service fuel delivery company owned and operated by Jim Thurston and Jay Carter. Established in 1998, we service customers in New Haven and Fairfield counties and is one of the premier home heating oil distributors in the state. J. Thurston Fuel is devoted to satisfying the needs and wants of our customers. Our services range from heating oil & propane delivery, new equipment installation and equipment repairs. We are committed to providing the highest quality fast, efficient service, competitively priced to all our customers we serve. From our delivery drivers, to our office staff and service technicians, our employees are friendly, knowledgeable ready to assist you in saving energy and money regarding all your home services needs.

"Very accommodating to my schedule. Everything neatly done . The final copper work looks like a piece of art. These people know what they are doing make no mistake about that. If you want the best hire this company. They are very knowledgeable and answer all of your questions. They are very easy to work with every step of the way for your project"

Carole O on September 2025


Astacio Plumbing & Heating

4.26(
34
)
Approved Pro

Astacio Plumbing & Heating

4.26(
34
)
Approved Pro
Customers say: Super punctual
21 years of experience
Free onsite estimate

What sets Astacio Plumbing and Heating apart from the rest of the field is the use of cutting edge technology to increase reliability, save you time and money, and improve safety on the job. Rich stays up-to-date on all the latest developments in plumbing and heating technology to determine how best to serve his customers. His trucks all carry the tools to get the job done on time and on budget, with as little disruption as possible. Astacio Plumbing and Heating has also spent years developing strong relationships with the best companies in the plumbing and heating business so that they can provide great service to you, quick delivery of replacement parts, and reasonable prices on excellent products. See website for additional service area. Additional email - [email protected].

"Dreadful experience. We had been customers of Astacio since 2015 when they installed our first tankless boiler which failed completely after 7 years and needed to be replaced in late 2022. ($10,000+) Their second one just stopped working; a dodgy board? The part is under warranty but they want almost $1,000 to replace it in the boiler; probably less than 2 hours work. I thought they used to be a good local business with ties to the community but be careful; their tankless boilers are unreliable and they'll try to rip you off when your heat goes out in the winter. So much for standing by their work. I'll never use them again."

CATHAL C on December 2024

What sets Astacio Plumbing and Heating apart from the rest of the field is the use of cutting edge technology to increase reliability, save you time and money, and improve safety on the job. Rich stays up-to-date on all the latest developments in plumbing and heating technology to determine how best to serve his customers. His trucks all carry the tools to get the job done on time and on budget, with as little disruption as possible. Astacio Plumbing and Heating has also spent years developing strong relationships with the best companies in the plumbing and heating business so that they can provide great service to you, quick delivery of replacement parts, and reasonable prices on excellent products. See website for additional service area. Additional email - [email protected].

"Dreadful experience. We had been customers of Astacio since 2015 when they installed our first tankless boiler which failed completely after 7 years and needed to be replaced in late 2022. ($10,000+) Their second one just stopped working; a dodgy board? The part is under warranty but they want almost $1,000 to replace it in the boiler; probably less than 2 hours work. I thought they used to be a good local business with ties to the community but be careful; their tankless boilers are unreliable and they'll try to rip you off when your heat goes out in the winter. So much for standing by their work. I'll never use them again."

CATHAL C on December 2024


Avatar for Candito Plumbing and HVAC, LLC

Candito Plumbing and HVAC, LLC

4.78(
25
)
Approved Pro

Candito Plumbing and HVAC, LLC

4.78(
25
)
Approved Pro
Customers say: True professional
51 local quotes requested
15 years of experience

Candito Plumbing and HVAC LLC, is a full service plumbing and HVAC company. Family owned and operated with over 20 years of combined experience we work with our customers to get the job done. From repairs to new installations we cover it all, no job is too big or too small for our team. Please give us a call today! We look forward to working with you!

"John and his team were great! The job was done professionally and on time. Highly recommend!"

Jim B on November 2025

Candito Plumbing and HVAC LLC, is a full service plumbing and HVAC company. Family owned and operated with over 20 years of combined experience we work with our customers to get the job done. From repairs to new installations we cover it all, no job is too big or too small for our team. Please give us a call today! We look forward to working with you!

"John and his team were great! The job was done professionally and on time. Highly recommend!"

Jim B on November 2025


Avatar for Celco Heating & Air Conditioning

Celco Heating & Air Conditioning

4.78(
103
)
Approved Pro

Celco Heating & Air Conditioning

4.78(
103
)
Approved Pro
Customers say: True professional
Recommended by 98% of Angi customers
Recommended by 98% of HomeAdvisor customers
35 local quotes requested

CONSISTENCY * DEDICATION TO QUALITY WORK * CUSTOMER SERVICE CELCO Heating and Air Conditioning is a mechanical firm built on 40 years of steadfast ethics and unrivaled attention to detail. The skill sets we possess, allow us to serve our customers in a top-notch manner. The ability to offer Design Build, Installation, Retrofitting and Service Work in a meticulous and enthusiastic fashion - sets us apart from other outfits. We hope you will consider giving CELCO heating and air conditioning the chance to earn your trust.

"Thorough explanation, great service, neat installation and competitive pricing. Would hire again."

Andy S on March 2024

CONSISTENCY * DEDICATION TO QUALITY WORK * CUSTOMER SERVICE CELCO Heating and Air Conditioning is a mechanical firm built on 40 years of steadfast ethics and unrivaled attention to detail. The skill sets we possess, allow us to serve our customers in a top-notch manner. The ability to offer Design Build, Installation, Retrofitting and Service Work in a meticulous and enthusiastic fashion - sets us apart from other outfits. We hope you will consider giving CELCO heating and air conditioning the chance to earn your trust.

"Thorough explanation, great service, neat installation and competitive pricing. Would hire again."

Andy S on March 2024


Avatar for Pack-Timco Heating & Cooling

Pack-Timco Heating & Cooling

New on AngiNew on Angi
Approved Pro

Pack-Timco Heating & Cooling

New on AngiNew on Angi
Approved Pro
196 local quotes requested
58 years of experience

Pack-Timco, LLC Heating and Cooling is one of the oldest and most reputable HVAC companies for over 50 years. Starting in 1967, Pack-Timco, LLC Heating and Cooling begun as a one-man, one-truck service operation by Lawrence C. Pack. Pack-Timco is a full-service heating and cooling company serving residential and light commercial customers throughout Fairfield and Westchester counties. We understand the demands of high-end residential design: discreet elegance, architectural harmony, and absolute performance. That’s why we specialize in tailor-made HVAC systems that integrate flawlessly into even the most ambitious homes.

Pack-Timco, LLC Heating and Cooling is one of the oldest and most reputable HVAC companies for over 50 years. Starting in 1967, Pack-Timco, LLC Heating and Cooling begun as a one-man, one-truck service operation by Lawrence C. Pack. Pack-Timco is a full-service heating and cooling company serving residential and light commercial customers throughout Fairfield and Westchester counties. We understand the demands of high-end residential design: discreet elegance, architectural harmony, and absolute performance. That’s why we specialize in tailor-made HVAC systems that integrate flawlessly into even the most ambitious homes.


Avatar for Mr. Handyman of Upper Fairfield County

Mr. Handyman of Upper Fairfield County

4.69(
247
)
Approved Pro

Mr. Handyman of Upper Fairfield County

4.69(
247
)
Approved Pro
Customers say: Super punctual
Recommended by 91% of Angi customers
Recommended by 91% of HomeAdvisor customers
312 local quotes requested

Individually owned and operated. Mr. Handyman completes all major and minor home repairs in a quick, efficient manner, making your To-Do list manageable allowing you to spend your time doing what you enjoy most. Professional, safe, reliable and on-time, every time, that's our guarantee. Additional phone numbers - (877) 674-2639, (800) 289-4600, (866) 231-5643. Additional DBAs - Mr Handyman of Greater Fairfield, L B & O LLC, Mr Handyman International LLC, Mr Handyman. Additional fax - (203) 268-8195.

"Excellent & efficient service"

Rich C on September 2025

Individually owned and operated. Mr. Handyman completes all major and minor home repairs in a quick, efficient manner, making your To-Do list manageable allowing you to spend your time doing what you enjoy most. Professional, safe, reliable and on-time, every time, that's our guarantee. Additional phone numbers - (877) 674-2639, (800) 289-4600, (866) 231-5643. Additional DBAs - Mr Handyman of Greater Fairfield, L B & O LLC, Mr Handyman International LLC, Mr Handyman. Additional fax - (203) 268-8195.

"Excellent & efficient service"

Rich C on September 2025


"Hired this company to replace two water heaters in my rental. Contractor responded quickly and got job done within few days from initial contact. Highly recommend."

Alex T on March 2025

For more than 78 years, we have been providing superior residential plumbing. We do comprehensive work -- and deliver great customer service. Our reputation in Fairfield County is second to none.

"Hired this company to replace two water heaters in my rental. Contractor responded quickly and got job done within few days from initial contact. Highly recommend."

Alex T on March 2025


Supreme Home Services

4.92(
12
)
Approved Pro

Supreme Home Services

4.92(
12
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
154 local quotes requested

Supreme Home Services: Your trusted choice for professional handyman services in the Tri-State Area. With our expertise and attention to detail, we deliver flawless results that transform your home. Contact us today!

"Steve was very helpful to help me dealing with several tasks that I could not do by myself. He is knowledgable and patience to answer my questions. Will definitely to hire the service again. Thank you."

YH L on January 2025

Supreme Home Services: Your trusted choice for professional handyman services in the Tri-State Area. With our expertise and attention to detail, we deliver flawless results that transform your home. Contact us today!

"Steve was very helpful to help me dealing with several tasks that I could not do by myself. He is knowledgable and patience to answer my questions. Will definitely to hire the service again. Thank you."

YH L on January 2025


Avatar for Bell Mechanical, LLC

Bell Mechanical, LLC

4.48(
84
)
Approved Pro

Bell Mechanical, LLC

4.48(
84
)
Approved Pro
Customers say: Super punctual
172 local quotes requested
45 years of experience

Bell Mechanical, LLC is a customer focused heating and air-conditioning company that was originally started in 1980. Located in Mahopac, NY, we employ highly trained people whose goal is to make our company the best service company in Westchester, Dutchess, Putnam and Fairfield County. Our company specializes in designing, engineering, and installing complete comfort systems for owners of existing homes and buildings just like yours. We take special pride in the craftsmen we train and employ--a fact you'll notice immediately in the attitude and integrity they bring to your job site. Our entire company works hard to make your experience with us hassle-free and enjoyable. Should we make a mistake, we will do everything in our power to correct it to your satisfaction. From the professionalism of our sales engineers, to the dedication of our field personnel, we are dedicated to delivering you the best. We take our responsibility very seriously when you place your trust in us. We pledge to always tell you up front what your cost will be to complete your job correctly. We make it a point to go over any details or limitations of the proposed system that will affect your enjoyment of the end result. You are told exactly what to expect up front. This is why Bell Mechanical continues growing with more satisfied customers each and every year. Give us a call for your service needs and see what you've been missing!

"Issue with Bell Mechanical This past August of 2024 we had a heat pump system installed in the house by Bell Mechanical. Unfortunately, we have had nothing but issues since with the biggest being no heat multiple times and now again today we are without heat in the majority of our house. It is freezing outside, we have a toddler and within the past week this is the 2nd time we have no heat (4th time since the system was put in). Not only is this a life safety issue, but it also is heart breaking to have your toddler tell you they are freezing. Looking for advice on next steps. We have never sued anyone or threatened to sue but this may be the time as we have had nothing but issues since the beginning. From the start we made it very clear that everything needed to be done to code and permitted. We were doing a lot of major renovations at our house and everything was being done to code and permitted. John (the salesman) at Bell said that was not a problem. John also told us that the only additional cost we could potentially incur outside of what he quoted us for the system and its installation would be a $500 fee for the installation of the heat strip. We accepted this and moved forward. After Bell removed our central air system and installed the new carrier system we got his with additional work needed at the tune of over 2k. Needless to say we were not happy. John told us the electrician they use and that if we used that electrician there would be no delay but if we used ours that it would cause a delay. So, we went with what John said as he was the expert. John got the electrician to come down a little in price which we were grateful for. Fast forward to when the building inspector came out to close out the permits for the work Bell did and other work being done at the house, the inspector told my contractor that the heat pump was not done to code. We were told that the electrical for it was not done to code and he could not close out the permit. My husband talked to the electrician Bell gave us who informed us that Bell told him to “cut corners” which was part of getting the cost down slightly. Reminder, we NEVER said to do this, we made it clear that everything needed to be permitted and even paid the permit fees to Bell. Back and forth with Bell and the electrician got the electrician to fix his work at no additional cost but Bell still needed to fix the outside plug which was not to code. Giovanni at Bell agreed that Bell would fix this issue at no additional cost. It has been 3 months now and Bell has still not rectified this issue and Giovanni and John are both nonresponsive to our follow-ups. Bell has also had to come out 4 additional times because our system was not working and again today, we have no heat. Today will be the 5th time they have to come out for issues on a system that is 4 months old. This is not OK. We have given Bell ample time to rectify the issues. Clearly they did not do the install properly and there is also the possibility we have a faulty system. We have never sued someone or went to court but then again, we have never had such large and costly issues."

Danielle G on December 2024

Bell Mechanical, LLC is a customer focused heating and air-conditioning company that was originally started in 1980. Located in Mahopac, NY, we employ highly trained people whose goal is to make our company the best service company in Westchester, Dutchess, Putnam and Fairfield County. Our company specializes in designing, engineering, and installing complete comfort systems for owners of existing homes and buildings just like yours. We take special pride in the craftsmen we train and employ--a fact you'll notice immediately in the attitude and integrity they bring to your job site. Our entire company works hard to make your experience with us hassle-free and enjoyable. Should we make a mistake, we will do everything in our power to correct it to your satisfaction. From the professionalism of our sales engineers, to the dedication of our field personnel, we are dedicated to delivering you the best. We take our responsibility very seriously when you place your trust in us. We pledge to always tell you up front what your cost will be to complete your job correctly. We make it a point to go over any details or limitations of the proposed system that will affect your enjoyment of the end result. You are told exactly what to expect up front. This is why Bell Mechanical continues growing with more satisfied customers each and every year. Give us a call for your service needs and see what you've been missing!

"Issue with Bell Mechanical This past August of 2024 we had a heat pump system installed in the house by Bell Mechanical. Unfortunately, we have had nothing but issues since with the biggest being no heat multiple times and now again today we are without heat in the majority of our house. It is freezing outside, we have a toddler and within the past week this is the 2nd time we have no heat (4th time since the system was put in). Not only is this a life safety issue, but it also is heart breaking to have your toddler tell you they are freezing. Looking for advice on next steps. We have never sued anyone or threatened to sue but this may be the time as we have had nothing but issues since the beginning. From the start we made it very clear that everything needed to be done to code and permitted. We were doing a lot of major renovations at our house and everything was being done to code and permitted. John (the salesman) at Bell said that was not a problem. John also told us that the only additional cost we could potentially incur outside of what he quoted us for the system and its installation would be a $500 fee for the installation of the heat strip. We accepted this and moved forward. After Bell removed our central air system and installed the new carrier system we got his with additional work needed at the tune of over 2k. Needless to say we were not happy. John told us the electrician they use and that if we used that electrician there would be no delay but if we used ours that it would cause a delay. So, we went with what John said as he was the expert. John got the electrician to come down a little in price which we were grateful for. Fast forward to when the building inspector came out to close out the permits for the work Bell did and other work being done at the house, the inspector told my contractor that the heat pump was not done to code. We were told that the electrical for it was not done to code and he could not close out the permit. My husband talked to the electrician Bell gave us who informed us that Bell told him to “cut corners” which was part of getting the cost down slightly. Reminder, we NEVER said to do this, we made it clear that everything needed to be permitted and even paid the permit fees to Bell. Back and forth with Bell and the electrician got the electrician to fix his work at no additional cost but Bell still needed to fix the outside plug which was not to code. Giovanni at Bell agreed that Bell would fix this issue at no additional cost. It has been 3 months now and Bell has still not rectified this issue and Giovanni and John are both nonresponsive to our follow-ups. Bell has also had to come out 4 additional times because our system was not working and again today, we have no heat. Today will be the 5th time they have to come out for issues on a system that is 4 months old. This is not OK. We have given Bell ample time to rectify the issues. Clearly they did not do the install properly and there is also the possibility we have a faulty system. We have never sued someone or went to court but then again, we have never had such large and costly issues."

Danielle G on December 2024

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Heating and Air Conditioning questions, answered by experts

A blockage in the ductwork may prevent air from flowing through the vent. If some rooms in your home are very hot or cold and another isn't, that can be a sign that a vent is blocked. Another sign of a blockage is a buildup of dirt or dust around the vent. In either case, a duct installer or cleaning service can investigate the issue for you and recommend a course of action.

Most experts recommend getting three to five HVAC quotes from licensed, insured, reputable local heating and cooling companies. Getting multiple detailed HVAC quotes (but not too many) lets you compare the equipment, services, and prices of several contractors without being overwhelmed by options. It can also let you see if one contractor’s prices are much higher or lower than the others and give you a chance to ask for clarification. That way, you can weed out any contractors who aren’t providing quality services or materials and find the company that best meets your budget, quality requirements, and long-term goals.

There are several tell-tale signs that your AC coils need cleaning, including:

  • You’re getting higher electricity bills.

  • Your home doesn’t feel as cool as it usually does.

  • Your AC unit is running longer than usual to cool your home.

  • Your home is more humid than usual.

  • The coil is covered in frost while running.

One of the first signs of mold in an air conditioner is a musty smell. You're likely to notice the smell when the unit runs, from the air coming out of the vents or the unit itself. You may also be able to see mold growing on the unit, such as near the condenser coils or by the fan. In some cases, there may be visible mold by the vents.

It depends on the specifics of your warranty. The motor is likely not covered if you’re working with a limited warranty. The same goes for other components like the compressor and evaporator coil. Some extended warranties will cover the blower and fan motor, so read the fine print before signing up. Additionally, the manufacturer may offer a warranty for the parts, including the motor, though there’s likely to be a strict time limit for this coverage.

The Cos Cob, 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.

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