Clean Air Starts Here — Proudly Serving Homes & Businesses Across Avon, CT

At Duct Diagnostics, we’re committed to improving indoor air quality one home and building at a time. Whether you’re in the heart of the city or in the quiet suburbs, our certified technicians are just a call away. We offer reliable and affordable air duct cleaning, dryer vent cleaning, and sealing services to ensure you and your family breathe cleaner, healthier air.

Commercial HVAC cleaning professionals servicing Connecticut businesses
Commercial HVAC cleaning professionals servicing Connecticut businesses

Clean Air Starts Here — Proudly Serving Homes & Businesses Across Avon, CT

At Duct Diagnostics, we’re committed to improving indoor air quality one home and building at a time. Whether you’re in the heart of the city or in the quiet suburbs, our certified technicians are just a call away. We offer reliable and affordable air duct cleaning, dryer vent cleaning, and sealing services to ensure you and your family breathe cleaner, healthier air.

Residential & Commercial

Clean Air Starts Here

Although we are headquartered in Milford, CT, our team of certified air systems cleaning specialists provides services to cities and towns across the entire state of Connecticut. For a free inspection of your home or business, please contact us through our online form, or call us at (203) 734-1532.

Clean Air Starts Here — Proudly Serving Homes & Businesses Across Avon, CT

At Duct Diagnostics, we’re committed to improving indoor air quality one home and building at a time. Whether you’re in the heart of the city or in the quiet suburbs, our certified technicians are just a call away. We offer reliable and affordable air duct cleaning, dryer vent cleaning, and sealing services to ensure you and your family breathe cleaner, healthier air.

Commercial HVAC cleaning professionals servicing Connecticut businesses
Commercial HVAC cleaning professionals servicing Connecticut businesses

Clean Air Starts Here — Proudly Serving Homes & Businesses Across Avon, CT

At Duct Diagnostics, we’re committed to improving indoor air quality one home and building at a time. Whether you’re in the heart of the city or in the quiet suburbs, our certified technicians are just a call away. We offer reliable and affordable air duct cleaning, dryer vent cleaning, and sealing services to ensure you and your family breathe cleaner, healthier air.

Our Duct Cleaning Services

Duct Diagnostics - Residential air duct specialists improving home ventilation and comfort
duct-cleaning-icon

Residential Duct Cleaning

Commercial HVAC cleaning professionals servicing Connecticut businesses

Commercial Duct Cleaning

Dryer vent cleaning by Duct Diagnostics

Dryer Vent Cleaning

What Our Customers Are Saying

4.9
SilviaAdrian R
23 hours ago
⭐️⭐️⭐️⭐️⭐️ Absolutely Amazing! We are beyond impressed with Duct Diagnostics, LLC in Middletown, CT! Eric and Leo came to our home on time and did an absolutely amazing job. They were professional, knowledgeable, thorough, and truly took pride in their work. Unfortunately, last week we hired another company to clean our vents and it was a terrible experience. They left our home dirty, did not do a good job, and, even worse, they used the wrong tool and actually ripped one of our instalation Then we called Duct Diagnostics, LLC, and what a difference! Eric and Leo came prepared with the right tools and equipment and took their time to properly inspect and clean everything. They covered our furniture before work and did an incredible job and left everything clean and professionally done. We are so impressed with this company. This is honestly one of the best companies we have ever worked with. As you can see from the photo Before & After. I highly, highly recommend Duct Diagnostics, LLC! If you want the job done right, this is the company to call! ⭐️⭐️⭐️⭐️⭐️
Matt Young
2 days ago
Ryan and Lou were great. Very thorough, professional and clean. Highly recommend
joe procko
3 days ago
Guys were professional and work quickly and left no trace...thanks
Dan M.
1 week ago
Great service. They did a great job cleaning everything. They also found some faults that were causing circulation issues and repaired them. Smart, friendly, and knowledgeable. Would definitely use their services again.
Jack Indiveri
1 month ago
Dan and Jim were fantastic! They did a great job with our duct cleaning and dryer vent cleaning. I highly recommend this company.
Rod Murray
1 month ago
Duct cleaning went smoothly. Dan, Anthony and Mike were polite and unobtrusive. Could not be happier with their service.
S Lindsay
2 months ago
Very quick and efficient estimate for duct cleaning via FaceTime. Eric and Leo were great. Both were super courteous and very efficient. Eric took time to share his thoughts on some issues we pointed out before he started, which he resolved. Very good experience today.
Dora Thagouras
2 months ago
Duct Diagnostics surpassed my expectations! Kevin and Anthony did THE MOST INCREDIBLE JOB cleaning my air ducts! I seriously cannot believe how thorough, efficient and professional they were and their work was outstanding! My house smells fresh and my AC no longer over works and makes loud noises due to over use. I will recommend them every single time! Thank you!!!
Violet D.
2 months ago
Fantastic service thank you !
Joyce Carroll
2 months ago
Cody and Andrew arrived at 8:00AM and went right to work. They were very professional, knowledgeable and efficient. We would strongly recommend Duct Diagnostics as a company that has a highly qualified and well trained staff.

Accreditations

Energy Star
CRM American Council for Accredited Certification
Indoor Air Quality Association Inc.
National Air Duct Cleaners Association (NADCA)
NADCA Certified Air Systems Cleaning Specialist
BBB
BNI
Connecticut Heating & Cooling Contractors Association