Reviews & Testimonials

We contacted Duct Diagnostics due to a strong obnoxious odor coming from our HVAC system, which we thought could have been caused by dirty ductwork. We had a free live video consultation with Ralph during which he diagnosed the potential problem as NOT being dirty ducts. He gage us tips and suggestions as to what may be causing the odor which will be simple to implement at no cost to us. He told us that yes, they could come clean the ducts but that that would likely not solve the issue. He said that he would not want us to spend that money. We have to give Ralph the highest marks for integrity and technical expertise - he could have very easily taken advantage of us and talked us into a very expensive duct , but he cleaning job, but he did not do so. We cannot recommend Duct Diagnostics enough! They are straight shooters!

We just bought an old house, on one floor with 3000 square feet of crawl space. Duct Diagnostics did an unbelievably thorough and complete job of cleaning the large amount of duct work that had probably never been cleaned before. They were meticulous in their cleanup, courteous and worked very well together as a team. The vents and baseboards look better than they did when they started. I cannot recommend them highly enough.

Eric & Anthony did a fantastic job. They covered EVERYTHING and were extremely respectful, neat and friendly. I would highly recommend them.

Our service from start to finish was fabulous! We have just moved in and knew the home had never been cleaned. The two techs were so conscientious and spent about 6 hours cleaning each zone, along with the Dryer vent. Great work, pleasant company to work with from start to finish.

Professional, courteous and neat. Dan and Anthony were terrific.

Lou and Anthony were Amazing - so helpful, very informative and professional! Left my house smelling good and clean!

Absolutely the best. As an HVAC contractor I needed a duct blast leakage test done for town approval on an A/C-Heat pump system and ductwork installation. They came highly recommended through trade contacts. Great communication and scheduling. Test was performed by an experienced trade professional without bias or confrontation. I have had my customers use Duct Diag. for duct cleaning and they were just as happy. 100% recommend this company.

⭐️⭐️⭐️⭐️⭐️ 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! ⭐️⭐️⭐️⭐️⭐️

Ryan and Lou were great. Very thorough, professional and clean. Highly recommend

Guys were professional and work quickly and left no trace...thanks

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.

Dan and Jim were fantastic! They did a great job with our duct cleaning and dryer vent cleaning. I highly recommend this company.

Duct cleaning went smoothly. Dan, Anthony and Mike were polite and unobtrusive. Could not be happier with their service.

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.

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!!!

Fantastic service thank you !