Specialties: Douglas Mechanical Services of Connecticut was incorporated in May of 2004. We are your source for quality air conditioning, heating, refrigeration, venting, and installation. Conveniently located in Plainville, but servicing the entire state of Connecticut, Douglas Mechanical Services takes pride in providing professional, high quality, and efficient service by knowledgeable techn...Specialties: Douglas Mechanical Services of Connecticut was incorporated in May of 2004. We are your source for quality air conditioning, heating, refrigeration, venting, and installation. Conveniently located in Plainville, but servicing the entire state of Connecticut, Douglas Mechanical Services takes pride in providing professional, high quality, and efficient service by knowledgeable technicians. Established in 2004. Servicing all of Central Connecticut and Middlesex County since 2004.see more