About Us

DeMent's Mechanical ShopEstablished in 1981, DeMent's Mechanical Corporation has been serving commercial clients in the Washington DC, Metropolitan area, as well as Northern Virginia, for over 25 years.


With an extensive selection of heating, cooling, and refrigeration capabilities and a steadfast commitment to quality, DeMent's Mechanical Corporation. is the only name you need to know for all your commercial and industrial HVAC needs.


From new construction projects and contract work to existing restaurants and business of every industry and size, we provide sales, service, installation, set up, and design you can depend on at a price you can afford.


DeMent's Mechanical TruckWhether you require a simple repair, timely maintenance, or a complete removal or upgrade of your heating, air-conditioning system or commercial refrigeration system, our highly skilled technicians are up to the task.


Fully licensed, bonded, and insured, we keep up with the latest advances in technology to ensure your commercial HVAC and refrigeration needs are met quickly and efficiently.


Location License


MD 10271
A.A. D1 1634
VA. 2705-075972
Alex. 11455-01
Herndon 00291
Pr. William 07L00618
Arlington 017235800



We currently serve the Washington, DC Metropolitan area as well as Northern Virginia

Quality Matters

How Can We Serve You

  • HVAC Design, Installation, & Service
  • Commercial Kitchen Ventilation Installation & Service
  • Commercial Sheet Metal Design, Fabrication, & Installation
    Learn More