The Critical Systems Service team is composed of highly-trained technicians, account managers, engineers and operations personnel.   We specialize in servicing commercial heating, ventilation, and air conditioning systems, including chillers, boilers, cooling towers, domestic hot water systems, building automated controls, VFD retrofit and installation, low temperature refrigeration, variable refrigerant flow systems and more.


We are proud to deliver a high level of professionalism, customer service and technical ability.   Our service team has an organizational focus on building efficiency as it relates to responsible energy usage, financial savings, and environmental impact; we believe that our partners cannot only expect to save valuable operations budget dollars, but also leave the world a better place for future generations.


Services Include:

  • Full Service preventive, predictive, and inspection-only maintenance agreements

  • HVAC installation, replacement, retrofit, and repairs

  • New equipment start-up and commissioning

  • Retro commissioning

  • 24/7/365 Emergency service

  • Efficient building operation, consulting, and evaluation

  • Equipment life cycle management

  • Factory certifications include the following:

Rockville, MD


12216 Parklawn Drive, Suite 201

Rockville, MD 20852

301.545.5100 (p)

866.400.0750 (f)

240.638.9768 Service Hotline

New England


58 Winter Street, 4th Floor

Boston, MA 02108

617.315.1300 (p)

866.400.0750 (f)


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