We Serve All of Connecticut!

Since 1998, Duct Diagnostics has offered residential and commercial Aeroseal duct sealing, duct cleaning, and dryer vent cleaning services to customers all over Connecticut. Our knowledge of the area and our professional experience has enabled us to develop long lasting relationships with homeowners and well known organizations, including Shelton High School and the entire Naugatuck School system. 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.

Service Areas
Certified duct cleaning and sealing experts near me in Connecticut

Breathe Cleaner, Live Healthier: Why Choose Us for Your Air Duct Cleaning

At Duct Diagnostics, we go beyond just cleaning your air ducts — we help you create a healthier home. Our certified technicians use industry-leading equipment to remove dust, allergens, mold, and contaminants from your ductwork, improving indoor air quality and HVAC efficiency. With over two decades of trusted experience, hospital-grade sanitization tools, and a commitment to customer satisfaction, we ensure your family breathes easier. Choose us for reliable service, transparent pricing, and results you can feel.

Residential & Commercial

We Serve All of Connecticut

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.

Ready to Breathe Easier? Call Us Today!

Don’t wait until poor air quality affects your comfort and health—let our experts at Duct Diagnostics handle your air duct cleaning needs. Whether it’s your home or business, our team is just one call away from providing cleaner, safer air. Reach out now to schedule your service or get a free estimate. We’re here to answer your questions and deliver the quality you deserve. Clean air starts with a simple call—contact us today!

Certified duct cleaning and sealing experts near me in Connecticut

What Our Customers Are Saying

4.9
Rod Murray
1 day ago
Duct cleaning went smoothly. Dan, Anthony and Mike were polite and unobtrusive. Could not be happier with their service.
S Lindsay
1 week 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
1 week 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 weeks ago
Fantastic service thank you !
Joyce Carroll
2 weeks 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.
Judith Egan
1 month ago
My husband, Paul, called Duct Diagnostics after getting a referral from a friend, and is he glad he did. From the nice office secretary, to the owner, Ralph, (who personally came out to our home for the estimate)to the two technicians who serviced the duct work, Jim and Scott, from"soup to nuts" all was great. Everybody was professional and pleasant to deal with. I highly recommend them!
Jeffrey Andrus
1 month ago
Josh and Anthony were a great team! They were thorough, professional, and knowledgeable. They answered all my questions and I could not be more pleased with the results. They deserve every one of their five stars!
nathan MacLean
1 month ago
Jaden, Kevin, and Shirley did an awesome job. The attention to detail and cleanliness was very impressive. I would highly recommend working with them.
John DiBuduo
1 month ago
Work was very clean. Met estimate. Staff was very polite and careful in the home.
Isabel Rathbone
1 month ago
This company was recommended by our Hvac service. The process for getting an estimate and scheduling was very smooth. The technicians were professional and very pleasant. They were careful to leave the house clean and to share what they found. No upselling or pressure. I would totally use them again.

Accreditations

Nadcacert
BBB accredited business
BNI
CHCC
Energy Star
CRM
Indoor Air Quality
Nadca