Leveraging experience and expertise

Prefabrication strategies deliver significant cost savings

HVAC System Retrofit
Our professionals have an excellent reputation in the Washington metro region for innovative solutions to heating, ventilating and air-condition system needs. We always welcome challenging mechanical projects such as HVAC system retrofits, giving us an opportunity to display our level of expertise in project management and mechanical craftsmanship. Since most of the projects are performed in occupied buildings, RM Thornton is able to skillfully strategize and operate in a multiphase approach as to not disrupt operation of the HVAC systems.

Geothermal HVAC
RM Thornton is committed to integrating the latest HVAC technology in our project delivery. Geothermal systems use the earth’s naturally occurring temperatures of 50 to 60 degrees to heat in the winter and cool in the summer, creating renewable energy that ultimately improves efficiency.

Our company is a factory authorized dealer for ECR Technology, Inc. equipment. To find out more about Geothermal technology, visit the ECR Technology website at

Sheet Metal/Ductwork Installations
RM Thornton has an in-house sheet metal shop that allows us to deliver and fast track sheet metal projects, custom duct work installations, and a variety of sheet metal products quicker than anyone else in the region. Our dedicated sheet metal professionals can handle projects of all sizes. For large projects, we often partner with other sheet metal companies, many of whom have worked with us for more than 60 years.

Cooling Tower Installations
RM Thornton is experienced in installing, replacing and retrofitting complex chiller plants and cooling towers on the roofs of large commercial, government and institutional buildings. Cooling towers are crucial to large buildings, as they provide the path of heat rejection through water to air heat exchange and evaporation from a building’s air-conditioning system. Our team always ensures that the cooling towers are installed properly and efficiently, allowing for optimal operation of the chilled water system.

Chiller Installations
RM Thornton has successfully completed numerous high-profile centrifugal chiller system projects, including an installation of four 5,000-ton workhorse chillers at the National Institute of Health (NIH).

We specialize in a full range of chiller system installations, including:

  • Complete centrifugal and absorption chiller plant installations
  • Chiller replacements
  • Chiller retrofits
  • Chiller piping modifications
  • Chiller plants installation with integrated ice-storage systems
  • Chiller system service and maintenance

Call us today for projects involving air-cooled chillers, centrifugal chillers, absorption chillers and steam turbine driven chillers.

Boiler Installations
Steam and hot boilers provide heating for most commercial, governmental, and institutional buildings. A property installed or retrofitted boiler system is can help avoid serious problems and breakdowns. Since our company’s foundation in 1932, boiler installations have always been an integral part of our expertise. Today, as one of Washington metro region’s most experienced commercial mechanical contractors, we have the capacity to install new and retrofit existing boilers.