Business Details
50+ Years
experience
Trusted HVAC and Refrigeration Services in Hagerstown, MD
M.S. Johnston has been a trusted leader in mechanical contracting since 1909, serving commercial, industrial, and residential clients across the Mid-Atlantic region. Our expertise spans HVAC design/build projects, commercial refrigeration systems, and food service equipment installation, supported by a dedicated sheet metal fabrication shop. As the longest-tenured York dealer globally, we combine cutting-edge technology with time-tested reliability, including energy-efficient green building solutions and a 50 KW solar power array at our Hagerstown facility.Our third-generation family ownership ensures personalized service while maintaining industry-leading technical proficiency through licensed engineers and certified technicians. Community engagement remains central to our values, demonstrated through equipment donations, bicycle recycling initiatives, and partnerships with organizations like Bikes for the World.
Services
HVAC Installation
Commercial Refrigeration
Food Service Equipment
Green Building Solutions
Sheet Metal Fabrication
Details
- Year established: 1909
Highlights and features
- 100+ years of mechanical contracting experience
- Authorized York and Hill-Phoenix equipment dealer
- On-site sheet metal fabrication capabilities
- LEED-certified green building specialists
- Third-generation family-owned with engineering expertise
Services
HVAC Installation
Our commercial HVAC installation services combine 100+ years of expertise with modern technology. We handle complete system design, equipment supply, and professional installation for new construction and retrofit projects. Our NATE-certified technicians ensure optimal performance and energy efficiency across all climate control systems.
Commercial Refrigeration
Specializing in commercial refrigeration solutions since 1932, we offer complete system design, equipment sales, and professional installation. Our Hill-Phoenix partnership provides access to industry-leading cold storage technology with ongoing maintenance support for grocery stores, restaurants, and industrial facilities.
Food Service Equipment
We design and install comprehensive food service equipment packages for restaurants, schools, and healthcare facilities. Our specialists create customized layouts with energy-efficient cooking, refrigeration, and sanitation systems. We support both full-scale operations and individual equipment replacements with professional installation.
Green Building Solutions
Our LEED-certified team implements energy-efficient mechanical systems using air, water, and geothermal technologies. We integrate solar power solutions with HVAC and refrigeration systems to reduce environmental impact while maintaining operational efficiency for commercial and industrial clients.
Sheet Metal Fabrication
In-house sheet metal fabrication supports our HVAC and industrial ventilation projects. Our facility produces custom ductwork and fittings to precise specifications, ensuring quality control and faster project timelines. This capability enables specialized solutions for complex commercial and industrial applications.
People
Michael S. Johnston
President
Licensed Professional Engineer in four states with decades of mechanical contracting experience. Third-generation leader guiding the company's technical innovation and community engagement initiatives.
Questions
What HVAC services does M.S. Johnston offer?
We provide complete commercial HVAC design/build projects, equipment sales, and professional installation services for new construction and renovation projects.
Do you service refrigeration equipment?
Yes, we offer complete refrigeration system design, installation, and maintenance services for grocery stores, restaurants, and industrial facilities.
Are you a local family-owned business?
Yes, we're a third-generation family-owned company serving the Mid-Atlantic region since 1909 with deep community ties.
What sustainability initiatives do you have?
We implement energy-efficient HVAC systems, maintain a solar-powered facility, and participate in equipment recycling programs for environmental stewardship.
Do you install food service equipment?
Yes, we design and install complete restaurant kitchen systems and food service equipment packages for various commercial operations.
