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Duct Diagnostics, LLC was formed in 1998. We specialize in commercial and residential Aeroseal air duct sealing and duct cleaning and have successfully completed jobs with prices ranging from a $400 home to a $120,000 school. Our goal at Duct Diagnostics is to achieve 100% customer satisfaction. We specialize in residential and commercial air duct cleaning, duct sealing, and dryer vent cleaning. Our state-of-the art equipment is contaminant-free and approved for use in sterile environments such as hospitals and laboratories. Our professionally trained staff prides itself on a job well done and gives the same consideration to all jobs, regardless of size. Integrity is the key to our success and is the reason we have a good reputation. Duct Diagnostics, LLC was formed in 1998 by Ralph Fico who is active in the company's day to day operations. Employees hold certifications as a Air Systems Cleaning Specialist and a Ventilation System Mold Remediator from NADCA(the National Air Duct Cleaners Association and as a Certified Microbial Remediator from the American IAQ Council. Every employee is OSHA10 certified.

Duct Diagnostics , LLC Questions

The Duct Diagnostics , LLC annual revenue was $3 million in 2026.

Duct Diagnostics , LLC is based in Milford, Connecticut.

The NAICS codes for Duct Diagnostics , LLC are [56, 561].

The SIC codes for Duct Diagnostics , LLC are [73, 734].

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