Custom Mechanical Services, LLC was founded in 1991 by Joseph DeFusco as a HVAC Service and Installation Company and holds a P1-0283045, S1-0303727, SM1-0000144, and HIC-0538467 CT License. Since the initial company formation, Plumbing Installation and Repair have been added to the core business. Custom Mechanical Services, LLC is proud to be able to service all of Connecticut, specializing in the design and installation of systems to maximize comfort and efficiency in any size home or business.

Custom Mechanical Services, LLC is on the cutting-edge of Hydronic (hot water) Heating Systems, utilizing multiple boilers, outdoor reset controls and primary / secondary piping systems to cut energy costs and increase comfort. Custom Mechanical Services, LLC also has a great deal of Steam Heating experience for both Residential and Commercial Applications.

Our Technicians are knowledgeable, hard working, friendly and will keep your home or business clean while working. In addition to an on-site Office Manager, we have a 24-hour answering service available for emergency calls so you will always speak to a live person, not an answering machine. We will work with your schedule to set appointments for job quotes or service calls. Custom Mechanical Service is here for you.