• From Concept through Completion

    Efficient, effective processes designed within your budget.
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  • Design Build Engineering

    Specialized in chillers plants, cooling towers, commercial air conditioning units.
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  • Quality Installations

    MSI provides quality installations that saving you money over the life cycle of your equipment.
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  • Preventative Maintenance & Servicing

    Certified technicians, with our 24 Hour Emergency Service. Guaranteed two-hour emergency response.
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  • Data Center and Mission Critical Systems

    Data Center and Mission Critical Systems
    We specialize in custom designs to protect your critical areas.
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  • Chilled Water Systems

    Chilled Water Systems
    From concept to completion we manage all your installation needs.
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  • Complete Heating Systems

    Complete Heating Systems
    We design, install and engineer complete systems that are cost-effective.
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  • HVAC Systems

    HVAC Systems
    We create solutions that deliver tangible bottom line results.
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  • HVAC Upgrades

    HVAC Upgrades
    Comfortable work environments promote clean air and energy savings.
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  • Energy Conservation

    Energy Conservation
    We offer eco-friendly LEED design and engineering.
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  • Sheet Metal & Duct Work

    Sheet Metal & Duct Work
    Custom commercial and industrial sheet metal fabrication.
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  • Mechanical Piping Systems

    Mechanical Piping Systems
    We offer expert installation of high or low pressure compression systems.
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  • Experienced & Skilled Technicians

    Experienced & Skilled Technicians
    We deliver quality work through our dedicated staff.
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  • 24 Hour Emergency Service

    24 Hour Emergency Service
    We are here when you need us, anytime day or night.
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  • Full Service Maintenance Contracts

    Full Service Maintenance Contracts
    We offer affordable monthly service agreements.
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  • EPA/OSHA Certified Technicians

    EPA/OSHA Certified Technicians
    Our safety records are among the best in the industry.
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Latest News

Brian Hooper Named 2013 Business Leader of the Year

Latest News

May 1st 2013 - Business NH Magazine
Business NH Magazine names Brian Hooper of MSI Mechanical Systems, Inc. in Salem 2013 Business Leader of the Year. Hooper was honored for his dedication to programs that provide essential skills to younger workers in the state's construction trade as well as for his extensive contributions to the community. Read More >

Featured Project

Featured Project

EMC Lab Upgrade

The world’s leading supplier of intelligent enterprise storage and retrieval technology and designer of systems for mainframes, open systems and midrange environments.

As the Mechanical Contractor on this project, MSI achieved the Owner’s goals with innovative design and quality craftsmanship while contending with a compressed schedule, strict security procedures, structural issues, and chiller warranty issues. With many difficult challenges encountered, MSI provided EMC with uninterrupted cooling throughout the project. View Projects >