Top-rated heating and air conditioning pros.

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

There are 10 highly-rated local heating and air conditioning pros.

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  • Average homeowner rating star icon4.7
    Average homeowner rating
  • Verified reviews icon274
    Verified heating and air conditioning services reviews

Find Heating and air conditioning pros in Collinsville

Avatar for Valerie Spencer Interiors LLC

Valerie Spencer Interiors LLC

4.99(
85
)
Approved Pro

Valerie Spencer Interiors LLC

4.99(
85
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
2007 years of experience

Valerie Spencer Interiors LLC: Precision Window Treatment Installation and Handyman Service. Blinds,shades and interior shutter measurement,installation,repairs and sales. Small job specialty handyman service. Certified professional installer for Hunter Douglas, Kirsch/Levelor as well as Somfy motorized products. Former preferred installer for JC Penney custom decorating. Experience with all product lines including Bali, Graber, Smith&Noble and 3Day blinds. Independent, work with decorators, work rooms and fabricators as well as the general public. Experience with both residential and commercial window covering installs and can measure for and install all varieties of hard and soft window treatments including custom cornices and valences, shades/blinds, drapery treatments and shutters. Also repair many window treatments including corded,cordless and motorized. Detail oriented former engineer with excellent references from customers attesting to the quality and integrity of my service. Handyman small job specialist including: flat screen tv, mirror and picture hanging. Lighting including ceiling fans and lamp repairs. Electrical,plumbing and appliance repair. Furniture assembly and setup,doors and locks and more. AngiesList Super Service Award since 2016. Fully insured. Rates are very competitive. Will travel to jobs anywhere in the state. If you're looking for a reliable, top notch measurement, installation and repair person look no further. Please call us today to schedule your appointment - (860) 638-8562.

"Job well done."

Julianne C on May 2023

Valerie Spencer Interiors LLC: Precision Window Treatment Installation and Handyman Service. Blinds,shades and interior shutter measurement,installation,repairs and sales. Small job specialty handyman service. Certified professional installer for Hunter Douglas, Kirsch/Levelor as well as Somfy motorized products. Former preferred installer for JC Penney custom decorating. Experience with all product lines including Bali, Graber, Smith&Noble and 3Day blinds. Independent, work with decorators, work rooms and fabricators as well as the general public. Experience with both residential and commercial window covering installs and can measure for and install all varieties of hard and soft window treatments including custom cornices and valences, shades/blinds, drapery treatments and shutters. Also repair many window treatments including corded,cordless and motorized. Detail oriented former engineer with excellent references from customers attesting to the quality and integrity of my service. Handyman small job specialist including: flat screen tv, mirror and picture hanging. Lighting including ceiling fans and lamp repairs. Electrical,plumbing and appliance repair. Furniture assembly and setup,doors and locks and more. AngiesList Super Service Award since 2016. Fully insured. Rates are very competitive. Will travel to jobs anywhere in the state. If you're looking for a reliable, top notch measurement, installation and repair person look no further. Please call us today to schedule your appointment - (860) 638-8562.

"Job well done."

Julianne C on May 2023


Avatar for J.M. Curtis Energy Solutions, LLC

J.M. Curtis Energy Solutions, LLC

4.93(
61
)
Approved Pro

J.M. Curtis Energy Solutions, LLC

4.93(
61
)
Approved Pro
Customers say: Quality work
Recommended by 96% of Angi customers
Recommended by 96% of HomeAdvisor customers
2009 years of experience

With over 30 years of experience in the refrigeration and HVAC industry, we are the experts you need to take care of your home, or business. We handle everything from refrigeration and HVAC Installations, to full repairs. We will treat your home or business as we would treat our own. Give J.M. Curtis Energy Solutions, a call today, we look forward to working with you!

"recently had the pleasure of working with Joel for an AC diagnosis and repair, and I couldn’t be more impressed with the level of service provided. From the moment he arrived, Joel displayed a high level of professionalism, courtesy, and technical expertise that immediately put me at ease. He quickly identified the issue, clearly explained the problem, and outlined the steps needed to get everything back up and running. What stood out the most was his thoroughness and honesty throughout the entire process. Joel didn’t just do a quick fix—he took the time to ensure everything was working properly and efficiently before he left. His professionalism, punctuality, and attention to detail were truly appreciated. It’s rare to find someone so committed to quality service and customer satisfaction. I highly recommend Joel for any HVAC needs—he’s a true professional who takes pride in his work. Thank you, Joel, for the outstanding service!"

Herold B on September 2025

With over 30 years of experience in the refrigeration and HVAC industry, we are the experts you need to take care of your home, or business. We handle everything from refrigeration and HVAC Installations, to full repairs. We will treat your home or business as we would treat our own. Give J.M. Curtis Energy Solutions, a call today, we look forward to working with you!

"recently had the pleasure of working with Joel for an AC diagnosis and repair, and I couldn’t be more impressed with the level of service provided. From the moment he arrived, Joel displayed a high level of professionalism, courtesy, and technical expertise that immediately put me at ease. He quickly identified the issue, clearly explained the problem, and outlined the steps needed to get everything back up and running. What stood out the most was his thoroughness and honesty throughout the entire process. Joel didn’t just do a quick fix—he took the time to ensure everything was working properly and efficiently before he left. His professionalism, punctuality, and attention to detail were truly appreciated. It’s rare to find someone so committed to quality service and customer satisfaction. I highly recommend Joel for any HVAC needs—he’s a true professional who takes pride in his work. Thank you, Joel, for the outstanding service!"

Herold B on September 2025


Avatar for Williams Electric Service, LLC

Williams Electric Service, LLC

4.83(
67
)
Approved Pro

Williams Electric Service, LLC

4.83(
67
)
Approved Pro
Customers say: Quick response
Recommended by 97% of Angi customers
Recommended by 97% of HomeAdvisor customers
2011 years of experience

Williams Electric is your go-to electrical service company. We offer 15 years of experience to take on your most challenging service work. We cover a wide range of electrical projects from that one outlet that never worked to a room remodel or a full rewire or service upgrade. We're committed to providing personal service for each project and look forward to building strong, long term relationships with you, our future clients!

"Professional, timely, communicates as appropriate. Great job done, we will continue to hire for our electric needs."

Faith F on August 2022

Williams Electric is your go-to electrical service company. We offer 15 years of experience to take on your most challenging service work. We cover a wide range of electrical projects from that one outlet that never worked to a room remodel or a full rewire or service upgrade. We're committed to providing personal service for each project and look forward to building strong, long term relationships with you, our future clients!

"Professional, timely, communicates as appropriate. Great job done, we will continue to hire for our electric needs."

Faith F on August 2022


Avatar for MULL BROTHERS INC

MULL BROTHERS INC

4.86(
99
)
Approved Pro

MULL BROTHERS INC

4.86(
99
)
Approved Pro
Customers say: Super punctual
Recommended by 95% of Angi customers
Recommended by 95% of HomeAdvisor customers
1945 years of experience

My name is Tom Mull of Mull Bros. Oil, a family-owned heating and cooling company in Wethersfield, Connecticut, where I was born and raised. There’s no doubt that you have seen many changes with the heating oil industry in the past decade or so. While many companies have given up or, out of desperation, have changed their business philosophies, we intend to be here for a long time. As a matter of fact, we’ve been around for over 60 years. My father, Bill Mull, started this company in 1945. At a time when stove-oil was in great demand and #2 fuel was being introduced as a home-heating fuel, Bill decided to get in to the delivery business. In the early 1950’s many oil burners were being installed on coal furnaces. Being mechanically inclined, Bill learned the art of installing and servicing the many styles of oil burners and heating systems.

"After interviewing several companies and getting quotes, we were most convinced of the combination of quality and value offered by Mull Brothers. After working with them, we saw that our decision was the right one. They performed all the work very well and in the time frames they had estimated and stayed available for any questions we had after the job was completed. We are very happy with the results and happy that we hired them."

Richard B on April 2022

My name is Tom Mull of Mull Bros. Oil, a family-owned heating and cooling company in Wethersfield, Connecticut, where I was born and raised. There’s no doubt that you have seen many changes with the heating oil industry in the past decade or so. While many companies have given up or, out of desperation, have changed their business philosophies, we intend to be here for a long time. As a matter of fact, we’ve been around for over 60 years. My father, Bill Mull, started this company in 1945. At a time when stove-oil was in great demand and #2 fuel was being introduced as a home-heating fuel, Bill decided to get in to the delivery business. In the early 1950’s many oil burners were being installed on coal furnaces. Being mechanically inclined, Bill learned the art of installing and servicing the many styles of oil burners and heating systems.

"After interviewing several companies and getting quotes, we were most convinced of the combination of quality and value offered by Mull Brothers. After working with them, we saw that our decision was the right one. They performed all the work very well and in the time frames they had estimated and stayed available for any questions we had after the job was completed. We are very happy with the results and happy that we hired them."

Richard B on April 2022


Avatar for Precise HVAC Home Services

Precise HVAC Home Services

4.94(
24
)
Approved Pro

Precise HVAC Home Services

4.94(
24
)
Approved Pro
Super Service Award
Customers say: True professional
2008 years of experience
Free onsite estimate

We take great pride in offering the best possible experience with our expertise, quality, and customer service. In order to understand the needs and expectations of our clients, we make every effort to work and communicate with everyone in a professional manner. It is our mission to exceed our clients expectations by providing excellent workmanship and complete customer satisfaction, from the start of each project to its completion. Our reputation is based on service, safety, and quality, regardless of how large or small the job.

"Ac needs service, but not the outlet. "

Rich F on June 2025

We take great pride in offering the best possible experience with our expertise, quality, and customer service. In order to understand the needs and expectations of our clients, we make every effort to work and communicate with everyone in a professional manner. It is our mission to exceed our clients expectations by providing excellent workmanship and complete customer satisfaction, from the start of each project to its completion. Our reputation is based on service, safety, and quality, regardless of how large or small the job.

"Ac needs service, but not the outlet. "

Rich F on June 2025


Avatar for Agile Construction and Home Improvement

Agile Construction and Home Improvement

4.78(
46
)
Approved Pro

Agile Construction and Home Improvement

4.78(
46
)
Approved Pro
Super Service Award
Customers say: Super punctual
2000 years of experience
Free onsite estimate

With over 12 years in the construction industry, we are an owned and operated company that will get the job done right the first time. We can do big or small projects and we can work out your payment too. Our company's mission is to build relationships with our customers, so they always know who to call. We look forward to working with you, give us all call today!

"He did an amazing job and was very professional "

Erica M on November 2025

With over 12 years in the construction industry, we are an owned and operated company that will get the job done right the first time. We can do big or small projects and we can work out your payment too. Our company's mission is to build relationships with our customers, so they always know who to call. We look forward to working with you, give us all call today!

"He did an amazing job and was very professional "

Erica M on November 2025


Avatar for Adam Electric

Adam Electric

4.85(
67
)
Approved Pro

Adam Electric

4.85(
67
)
Approved Pro
Customers say: Quality work
Recommended by 97% of Angi customers
Recommended by 97% of HomeAdvisor customers
2008 years of experience

As a child, riding around with my father, he would often point out homes that he had remodeled. It seemed almost every street we turned down had a house with some aspect of it that he had touched. The variety of places he would work and the distances he would travel led me to take up a trade as well. I gravitated toward the remodeling aspect of the electrical trade early on and have built my business on remodels/renovations over the last 18 years. Be it a simple powder room or major department store, I have tackled every size renovation, and for the past 27 years, always taken pride in my work and satisfaction from a job well done.

"Very professional and quick diagnostic, resulted in an effective repair"

SC H on March 2025

As a child, riding around with my father, he would often point out homes that he had remodeled. It seemed almost every street we turned down had a house with some aspect of it that he had touched. The variety of places he would work and the distances he would travel led me to take up a trade as well. I gravitated toward the remodeling aspect of the electrical trade early on and have built my business on remodels/renovations over the last 18 years. Be it a simple powder room or major department store, I have tackled every size renovation, and for the past 27 years, always taken pride in my work and satisfaction from a job well done.

"Very professional and quick diagnostic, resulted in an effective repair"

SC H on March 2025


Avatar for Wa/ve Sound and Security, LLC

Wa/ve Sound and Security, LLC

4.93(
54
)
Approved Pro

Wa/ve Sound and Security, LLC

4.93(
54
)
Approved Pro
Super Service Award
Customers say: True professional
2007 years of experience
Free onsite estimate

Founded in 2007, Wa/ve Sound and Security, LLC has evolved as an industry leader in providing innovative solutions for the security, entertainment, and productivity of our customers. Our focus is to educate the customer so they can make the most informed decision on the products they are looking to purchase. We maintain a clean work environment, cleanup is important to us - we strive to leave the work site better than how we found it!

"Wes did an amazing job getting our dental practice music back up and running after a power surge took it out. His prompt attention brought the morality back up in the office while treating the patients. He was extremely communicative throughout the whole process. Thank you Wes!"

Samantha V on March 2025

Founded in 2007, Wa/ve Sound and Security, LLC has evolved as an industry leader in providing innovative solutions for the security, entertainment, and productivity of our customers. Our focus is to educate the customer so they can make the most informed decision on the products they are looking to purchase. We maintain a clean work environment, cleanup is important to us - we strive to leave the work site better than how we found it!

"Wes did an amazing job getting our dental practice music back up and running after a power surge took it out. His prompt attention brought the morality back up in the office while treating the patients. He was extremely communicative throughout the whole process. Thank you Wes!"

Samantha V on March 2025


Avatar for Omni Mechanical Services, LLC

Omni Mechanical Services, LLC

4.61(
79
)
Approved Pro

Omni Mechanical Services, LLC

4.61(
79
)
Approved Pro
Customers say: Quality work
Recommended by 96% of Angi customers
Recommended by 96% of HomeAdvisor customers
1995 years of experience

We have over 20 years of experience in the Heating and Cooling trade. Here at Omni Mechanical Services, LLC, we pride our company on reliability, great communication, integrity, and quality work. We are experts in our trade and will do our best to keep you as educated as we can on your particular task or project. We look forward to earning your business!

"I hired this company to Indy my air conditioner , it was represented by Tom . Hi seemed very nice and intelligent person , so I trusted him . If I only can imagine what they would do to my house I would never let this people close to my house . I am very disappointed and shocked about coming to my home and finding the disturbing mess and unprofessional work done. I have witnessed a few things in the previous days but have not said anything. What I came home to yesterday was disgusting and caused damage to my personal property. Oil was thrown into my shower, dirt all over my rugs in the basement, door broken, my towels beyond filthy with the mess your workers did. Oil dumped all over my shower and me getting dizzy from the smell and almost fainted. I do not need to write anymore as the evidence with pictures explains everything. This is the first time I have experienced such terrible customer service. When I asked them to came and fix a problem which was also don by the company they simply said to me Goodby , we do not care about it à ¢à  à  please didnà ¢à  à  t trust this people you can call me and ask me about the horrible damage they did to my house 203-243-0946 . The drain system was not install correctly and now I have pay almost the amount I paid for their job"

Natalija J on January 2024

We have over 20 years of experience in the Heating and Cooling trade. Here at Omni Mechanical Services, LLC, we pride our company on reliability, great communication, integrity, and quality work. We are experts in our trade and will do our best to keep you as educated as we can on your particular task or project. We look forward to earning your business!

"I hired this company to Indy my air conditioner , it was represented by Tom . Hi seemed very nice and intelligent person , so I trusted him . If I only can imagine what they would do to my house I would never let this people close to my house . I am very disappointed and shocked about coming to my home and finding the disturbing mess and unprofessional work done. I have witnessed a few things in the previous days but have not said anything. What I came home to yesterday was disgusting and caused damage to my personal property. Oil was thrown into my shower, dirt all over my rugs in the basement, door broken, my towels beyond filthy with the mess your workers did. Oil dumped all over my shower and me getting dizzy from the smell and almost fainted. I do not need to write anymore as the evidence with pictures explains everything. This is the first time I have experienced such terrible customer service. When I asked them to came and fix a problem which was also don by the company they simply said to me Goodby , we do not care about it à ¢à  à  please didnà ¢à  à  t trust this people you can call me and ask me about the horrible damage they did to my house 203-243-0946 . The drain system was not install correctly and now I have pay almost the amount I paid for their job"

Natalija J on January 2024


Avatar for East Coast Mechanical Inc

East Coast Mechanical Inc

4.74(
81
)
Approved Pro

East Coast Mechanical Inc

4.74(
81
)
Approved Pro
Customers say: Super punctual
Recommended by 93% of Angi customers
Recommended by 93% of HomeAdvisor customers
1994 years of experience

Formed in 1994 by Norm Wium, East Coast Mechanical Inc. has become one of the preeminent Trane Comfort Specialist Dealers in the area. We specialize in residential renovation and replacements along with residential/light commercial construction and service. Located at 1187 Highland Avenue in Cheshire, we have a complete fabrication shop, office and service parts inventory on site. We offer 24-hour service, maintenance agreements and, of course, free evaluations and heat loss calculations for comfort system installations. Additional email - [email protected].

"Perfect as I expected and more. East Coast installed a central air system and a ductless heating and calling system in my house. They were much affordable than their competitor."

Halim E on August 2023

Formed in 1994 by Norm Wium, East Coast Mechanical Inc. has become one of the preeminent Trane Comfort Specialist Dealers in the area. We specialize in residential renovation and replacements along with residential/light commercial construction and service. Located at 1187 Highland Avenue in Cheshire, we have a complete fabrication shop, office and service parts inventory on site. We offer 24-hour service, maintenance agreements and, of course, free evaluations and heat loss calculations for comfort system installations. Additional email - [email protected].

"Perfect as I expected and more. East Coast installed a central air system and a ductless heating and calling system in my house. They were much affordable than their competitor."

Halim E on August 2023

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Heating and Air Conditioning questions, answered by experts

The $5,000 rule for HVAC systems helps homeowners decide whether to repair or replace an AC or furnace. Take the quote for the HVAC repair cost and multiply that by the age of the HVAC system. If the total is higher than $5,000, it’s more cost-effective to replace the system. If the total is lower than $5,000, consider repairing the system.

An undersized whole-house generator has the potential to overheat and shut down when you try to run a central AC system. This scenario can not only damage the whole-house generator, but can also trip your home’s breakers or cause electrical damage. To avoid this situation, hire a local generator installer to correctly size your whole-house generator.

There are many signs of a bad AC fan motor, including if the fan blades don’t spin when the AC kicks on or if they keep spinning when the AC is off. The AC fan cools down the condenser coil, so a faulty motor can also cause the system to overheat. Unusual noises in the exterior AC unit, including grinding or rattling sounds, may also be a sign that the AC fan motor is worn out.

Yes, you should turn off your AC if it’s leaking. Turning off the AC will prevent more condensation from leaking from your unit, and it will also reduce the increased strain on the system if a damaged internal component or a lack of refrigerant is the culprit. As soon as you notice a leak, turn off the system and investigate the source of the leak or call a pro to inspect it.

The difference between a home surge protector and an HVAC surge protector is that an HVAC surge protector is designed to protect the components inside your HVAC unit while a home surge protector is installed near appliances and meant to protect your entire home. There are three tiers of whole-house surge protectors, and they are more expensive to install than HVAC surge protectors.

The Collinsville, 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.

What do you need done? We’ll find top pros.
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