Business Details
50+ Years
experience
Trusted HVAC & Refrigeration Services in Hagerstown
MS Johnston has been a trusted leader in mechanical contracting since 1909, serving commercial, industrial, and residential clients across Maryland, Pennsylvania, Virginia, and West Virginia. As the longest-tenured York dealer globally, we specialize in HVAC design/build, commercial refrigeration, and food service equipment installation, backed by 80+ years of expertise. Our team of licensed professionals delivers energy-efficient solutions, including LEED-certified projects and a 50 KW solar array at our Hagerstown facility, demonstrating our commitment to sustainability.We prioritize long-term relationships with clients, suppliers, and communities, evidenced by decades of partnerships and local initiatives like bicycle recycling for global impact. With in-house sheet metal fabrication and mobile refrigeration services, we ensure quality craftsmanship and reliability for every project, regardless of scale.
Services
Commercial HVAC
Residential HVAC
Green Building HVAC
Sheet Metal Fabrication
Commercial Refrigeration
Food Service Equipment
Mobile Refrigeration
HVAC Design/Build
HVAC Service
Solar Energy Integration
Details
- Year established: 1909
Highlights and features
- We have over 80 years of experience in HVAC and refrigeration contracting.
- Our team includes licensed Professional Engineers in four states.
- We specialize in LEED-certified green building projects.
- We operate a state-of-the-art in-house sheet metal fabrication shop.
- We partner with leading manufacturers like York and Hill-Phoenix.
Services
Commercial HVAC
MS Johnston designs and installs custom HVAC systems for commercial and industrial facilities. Our services include plan-and-spec installation, energy-efficient upgrades, and maintenance for shopping centers, manufacturing plants, and government buildings. With 80+ years of experience, we ensure optimal climate control and energy savings for large-scale operations.
Commercial Refrigeration
We provide comprehensive commercial refrigeration solutions, including equipment sales, installation, and service for walk-in coolers, freezers, and specialty storage units. Our team works with Hill-Phoenix and other leading manufacturers to deliver reliable temperature control systems for supermarkets, food processing facilities, and cold storage warehouses.
Food Service Equipment
Our food service division offers complete kitchen equipment design and installation for restaurants, schools, and healthcare facilities. We supply and install cooking appliances, ventilation systems, refrigeration units, and specialty equipment from trusted brands like Cleveland, Garland, and Southbend, ensuring compliance with health and safety standards.
Green Building HVAC
We specialize in energy-efficient HVAC solutions for LEED-certified projects and environmentally conscious clients. Our services include geothermal system design, solar energy integration, and indoor air quality improvements. Our 50 KW solar array demonstrates our commitment to reducing carbon footprints through innovative green technology.
Sheet Metal Fabrication
Our in-house sheet metal shop produces custom ductwork and HVAC components for commercial and industrial projects. This capability allows us to maintain quality control, reduce lead times, and deliver precision-fabricated parts that meet exact project specifications for both new construction and retrofit applications.
People
Michael S. Johnston
President
Michael S. Johnston is a licensed Professional Engineer with decades of experience in mechanical contracting. He leads MS Johnston with a focus on innovation, sustainability, and community engagement, continuing the family legacy established in 1909.
Maurice F. Johnston
Former President
Maurice F. Johnston served as President for many years, expanding the company's HVAC and refrigeration divisions. He built the foundation for MS Johnston's reputation as a regional leader in mechanical contracting through his technical expertise and customer-centric approach.
Questions
What HVAC services does M.S. Johnston Co. offer?
We provide commercial, industrial, and residential HVAC design/build, installation, and maintenance services for all system types.
Do you offer refrigeration solutions for businesses?
Yes, we specialize in commercial refrigeration equipment sales, installation, and service for supermarkets, warehouses, and specialty facilities.
Are financing options available for HVAC projects?
Yes, we offer financing solutions to help clients manage the cost of HVAC and refrigeration system upgrades.
What geographic areas do you serve?
We serve Maryland, Pennsylvania, Virginia, and West Virginia, with our Hagerstown, MD headquarters as our primary hub.
Do you provide food service equipment installation?
Yes, we design and install commercial kitchen equipment for restaurants, schools, nursing homes, and food retail operations.
What sustainability initiatives does your company have?
We incorporate LEED-certified practices, maintain a 50 KW solar array, and prioritize material recycling in all our projects.
