MSI is a heating and air conditioning installation & service contractor that was established in 1970.  We specialize in the installation, service, and maintenance of all types of commercial heating & cooling systems. 

We maintain a fleet of fully stocked service trucks to provide 24 hour/ 7 day per week service to our maintenance customers. 

We service the heating & air conditioning needs of some of the Maryland area's largest corporations, banks, and property management companies. 

MSI also specializes in the service and installation of automatic temperature control systems, including electric, electronic, direct digital, and pneumatic systems. 

A wide variety of service contracts are available from parts & labor contracts to labor contracts only. 

• Rooftop Units
• Chillers
• Cooling Towers
• Variable Frequency Drives
• Boilers
• Pumps
• Heat Exchangers
• Heat Pumps