Over 30 Years in the Washington Metropolitan Area

Heating and Air Conditioning Repair, Replacement and Maintenance

Established in 1990 by President and owner Robert Weaver, Potomac Mechanical Contractors, Inc. is a full service Mechanical Contractor who specializes in Commercial Tenant Work, HVAC and Plumbing service.

About Us

With the additional help from Vice Presidents Steven Embrey and Michael Didion, Potomac Mechanical has grown and expanded to provide professional and dependable service to commercial clients throughout the Washington Metropolitan area.

Specializing in commercial work for unitary as well as built-up HVAC systems, Potomac Mechanical is staffed with a highly trained management and technical team, who are committed to providing the very highest quality of service to each and every customer.

All employees work as a team, doing what it takes to get the job done with quality and efficiency which has allowed Potomac Mechanical to have continued success in the region.

For the future, Potomac Mechanical looks to continue its development in the HVAC and Plumbing market, taking on projects large and small while following the pace set throughout previous years.


Sales, Services, Installation
Commercial HVAC


  • Warranty
  • Installation
  • Replacement
  • Repairs
  • Preventative Maintenance
  • Budget Items

24 Hour Emergency Service

Call for a Quote Today! (301) 590-8164

Did You Know?

Dirt and neglect are the top causes of heating and cooling system inefficiency and failure.

HVAC systems in commercial buildings are accountable for more than 40 percent of total energy use. Keeping the HVAC systems running at peak efficiency, saves money automatically!

Think Preventative Maintenance

Preventative Maintenance is a vital component to guarantee your companies HVAC equipment is operating properly.

Regularly scheduled maintenance ensures:

  • Priority Service
  • 24/7 Emergency Care
  • Efficiency & Reliability
  • Lower utility costs
  • Peace of Mind
  • Greater comfort for building's occupants

The better maintained, the more likely you're going to get the appropriate life cycle from the equipment.


Commercial and Residential Plumbing Services

Schedule a Service Visit

Plumbing Services We Offer:

  • Priority Service
  • Water Heater Replacement
  • Backflow Testing/Certification
  • Bathrooms: ADA Upgrade & Fixture Replacement
  • Pantry Sink, Faucet, and Garbage Disposal Replacement
  • Leak Repairs, Snaking Drains, etc…
  • General Maintenance
  • Gas
  • Clogged Drains
  • and more!

We service a range of client including:

  • Commercial
  • Residential
  • Medical
  • Lab Space
  • Dental
  • Government
  • Hotels
  • Churches
  • Restaurants
  • Multi Family

Give us a call! 240-620-3562


Some of our clients we perform work for:

  • Avison Young
  • Blake Real Estate
  • Bognet Construction Associates Inc.
  • C-Con
  • Capital One Arena
  • Clune Construction Co.
  • Coakley & Williams Construction Inc.
  • DFS Construction
  • Donohoe Construction
  • Dubois Construction
  • Encore
  • Forrester Construction Company
  • Gilbane
  • Harvey Cleary
  • HITT Contracting Inc.
  • James G. Davis Construction Corporation
  • Kalmia
  • KBR Corporation
  • May Construction Group
  • Mazzuca Contracting
  • Montgomery County Public Schools
  • Pizzano Contractors
  • Therrien Waddell Construction Group
  • Trinity
  • Vantage Construction Corp.

Project Photos

Call for a Quote Today
(301) 590-8164


18915 Premiere Ct.
Gaithersburg, MD 20879


(301) 590-8164


(301) 590-8734