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
Barbara
2 days ago
The crew (Dan, Leo & John) showed-up right on time, explained what was involved with cleaning the ducts, walked through the house with us to make sure they knew where all the supply & return register were located and went to work. They put down drop cloths, covered all furniture near their work area and wore booties when in the house. The entire process was dust free! They were friendly & courteous. They showed us before and after photos of the ducts…BIG difference! Well worth the money! It’s great to work with a company that cares about their workmanship and their customers. We highly recommend them!
Frederick Alexander
1 week ago
Amazing service in every way with excellent results, well worth the cost. Kudos especially to Cody and his crew.
Michael Wright
2 weeks ago
Dan and Colby were fantastic! Showed up on time and did excellent work. And they charged me exactly what they quoted me! Would highly recommend. Thanks guys!
Zorba Lieberman
3 weeks ago
Dan and Anthony came to the house to do the job. They were very neat and conscientious as they did their work. They shared before and after photos, which were very helpful. Very happy with this group.
Matthew Geula
3 weeks ago
Great experience from first phone call all the way through to the final day of the job. Rob was able to provide an estimate based on the FaceTime walkthrough we did of the entire house - including the attic and basement. He was knowledgeable, thorough, open and forthcoming every step of the way. We scheduled the job for a few months out bc of the crazy winter we had and when I had to reschedule at the last minute bc of a travel conflict DD was more than accommodating. The crew was punctual, if not early, clean and respectful. Kevin and Andrew were excellent and efficient. Both extremely knowledgeable and easy to work with. Highly recommend.
Raymond Kuruc
4 weeks ago
Very efficient and thorough. They did an excellent job.
David Pressler
1 month ago
Eric and John were very courteous and helpful. They did the work in a timely fashion. We would certainly use them in the future!
Robert Falkowski
1 month ago
Dan and Anthony were FABULOUS! Explained everything they were doing in great detail. Left the house cleaner than it was before they arrived! Great company to work with from first phone call to job completion. Wish all companies could be so great to work with! THANK YOU!!!
Anupam Tantri
1 month ago
We had not had our air ducts cleaned at all. My HVAC company recommended Duct Diagnostics. And I am mighty glad they did. The three-person team of Duct Diagnostics, led by Eric did a fantastic job. They came in at 7:30 am and left around 4 pm. They did a thorough job and cleaned up the work areas before they left. I would highly recommend Duct Diagnostics for your duct cleaning needs.
Olivia O'Brien
1 month ago
Duct Diagnostics did an amazing job cleaning our HVAC! We recently bought a home and could tell the ducts needed major work. Actually, when the team came to evaluate our system, they said it looked like the HVAC had never been cleaned since the house was built in 1993. Josh and Gibson were extremely professional, personable, and transparent with costs and services. They showed detailed pictures at the start and end, always confirmed with us before starting an unexpected part of the cleaning, and kept our house spotless throughout. The entire cleaning was done in 4 hours - well ahead of schedule without compromising the quality. We will absolutely be booking with this company in the future and will be recommending to others in need of their service!

Accreditations

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