*The Angi rating for Air Conditioning companies in Derby, CT is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Air Conditioning needs.
*The HomeAdvisor rating for Air Conditioning companies in Derby, CT is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Air Conditioning needs.
Last update on July 21, 2026
Serving Derby, CT and surrounding areas
Approved
In business since 1994
Free estimates
Emergency services offered
"First time customer and we have asthma so need this fixed promptly. Very happy with the service. AC working great now!"
+172
Serving Derby, CT and surrounding areas
Approved
In business since 2017
Free estimates
Credit card accepted
"Y&M did a great job cleaning our air ducts and adding UV system. Very thorough and professional. Excellent service and plan to use again."
Serving Derby, CT and surrounding areas
Approved
Super Service Award Winner
In business since 2023
Free estimates
Emergency services offered
"Wornderful job from the guys they were on time and left the house in excellent condition after the job was done, will definitely recommend them to my family and friends."
+2
Serving Derby, CT and surrounding areas
Approved
In business since 2008
Free estimates
Emergency services offered
"Had my furnace cleaned. Price was reasonable. The technician was friendly and prompt. Very sstisfied with choice."
+4
Serving Derby, CT and surrounding areas
Approved (Corporate)
In business since 1903
Emergency services offered
Warranties offered
"I contacted a man I had spoken with last year so it was quick, easy, and painless to get set up. I will have them come out next month to do the first cleaning."
Serving Derby, CT and surrounding areas
Approved
In business since 1952
Free estimates
Credit card accepted
"I cannot understate how impressive and utterly reliable the professionals at Air Specialties are. We have been dedicated customers for more than a decade. Their technical expertise has seen us through a few emergencies as well as analyzed, engineered and installed an updated HVAC system when we expanded our homes living space. We have had a service agreement with them for many years. As a result, we are able to maintain one of the critical systems in our homes living space which in turn helps to maintain its value. The technical staff is careful at diagnosing and fixing the various issues that have popped up over the years. I strongly recommend anyone who is intent on keeping their HVAC systems reliably operating do business with Air Specialties! P. Robinson- mid state CR"
Serving Derby, 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!"
+17
Serving Derby, CT and surrounding areas
Approved
In business since 1976
Free estimates
Emergency services offered
"Excellent communication and professional work. Christine was fantastic to work with from the initial quote though the completion of the project. Our tenant said that the installers were extremely professional and considerate. Celco actually suggested we apply for the EnergizeCT heat loan program and Lisa was extremely helpful in handling all the paperwork to save us thousands in up-front costs and get an extremely low interest loan. After 2 months of use the heat pump system is saving us 30% on electricity costs...wish I had called Celco the day we bought the condo."
+8
Serving Derby, CT and surrounding areas
Approved (Corporate)
In business since 1946
Free estimates
Emergency services offered
"Great experience Justin, Nate & Timothy were awesome. Very knowledgeable, professional & curious. Aside from the cleanliness they delivered an experience. I highly recommend HL bowman if you want rapid service on your HVAC. Pricing was reasonable in my opinion & financing is an option. Keep in mind when seeking quotes for your HVAC repair/ new install you must consider performance over equipment, that is if your want a good system that will have a good run/life span."
+6
Serving Derby, CT and surrounding areas
Approved
In business since 1938
Free estimates
Emergency services offered
"Matt and his team did a fabulous job replacing and installing our oil furnace. He also helped with other issues that we were having with our heating and cooling system for years. Very conscientious, courteous and keeps a the place clean,"
+1
From average costs to expert advice, get all the answers you need to get your job done.
Discover the true swamp cooler installation cost. Learn about average prices, cost factors, and ways to save on your home cooling project.
When your window AC isn’t cutting it, but central AC is too expensive, installing a new ductless mini-split AC may be the cooling solution you’re looking for. Find out what a mini-split costs and how to hire the right pros to get the job done.
Get a clear estimate of swamp cooler repair cost, including average prices, key cost factors, and tips to save money on repairs for your home.
Choosing between a portable AC vs. swamp cooler comes down to energy efficiency, cooling preferences, and climate. Find out how these systems compare.
Swamp coolers are cheaper to install and run than a central AC unit, but are they right for your home? This guide breaks down what you need to know.
Learn the difference between mini split AC vs. central air. For example, central air has air ducts, but a ductless mini split AC cools without them.
