M.S. Johnston has been the mechanical contractor for Frederick, MD since 1932. Our records show 63 completed projects in Frederick, including 31 commercial HVAC projects, 31 commercial refrigeration projects, 1 food service equipment project. Our service trucks have run 1,388 calls to Frederick businesses, so the technician who arrives has usually been to the building before.
What we do in Frederick
- Commercial HVAC — design, installation, and service
- Commercial refrigeration — design, installation, and service
- Food service equipment — design, installation, and service
- Emergency service for refrigeration and rooftop equipment
- Mobile refrigeration rentals when a walk-in goes down
Work we have completed in Frederick
A sample of commercial projects in and around Frederick:
Why Frederick businesses call us
One contractor covers the whole building. The rooftop units, the walk-in cooler, the kitchen line, and the ductwork that ties them together all come from the same company, fabricated in our own sheet metal shop. When something fails you make one call instead of three, and nobody argues about whose equipment it is.
We are the longest-tenured York dealer in the world, and we have been doing this from the same Hagerstown address since 1932. That matters in Frederick because the buildings we service, we often installed.