Customer Driven. Quality Installation. What we do Unified Plumbing and Heating is commercial mechanical contractor with experience in renovations, new construction, and design build projects. We specialize in tenant improvements, making sure to deliver a quality mechanical system on opening day. Our Services We provide the following services, and more. Contact us to inquire or request a quote. Backflow Installation and CertificationDesign BuildsRenovationsTenant Improvements Commercial Installations of HVAC, Plumbing, Heating, and Gas Systems Contact Us