About

RM Thornton Mechanical offers commercial services in engineering and design, preconstruction, HVAC, plumbing, and process piping in the Washington, DC metropolitan area. Since 1932, it has built a reputation for the uncompromising quality of its full-service mechanical work. Its dedicated and highly skilled team of plumbers, steamfitters, sheet metal workers, and HVAC service technicians have been recognized by the Washington Building Congress with fourteen Individual & Team Craftsmanship and Star Awards, and have helped build many national landmarks in the Washington, D.C. area. RM Thornton Mechanical is a division of Harris Companies.