HVAC / Mechanical

Mechanical Construction, HVAC, HVAC Repair, and Engineering Services


NEMSI provides a vast range of resources to support the service and facilities operations groups. NEMSI's in-house mechanical design-build, commercial HVAC, commercial heating, and engineering and sales professionals are committed to developing and maintaining long-term relationships by providing personal attention to clients' needs. 

NEMSI has earned the distinction of being a national award-winning commercial HVAC and mechanical design-build contractor. Experienced project sales engineers oversee a diverse variety of projects ranging from commercial office and warehouse space to process facilities and research laboratories.

Mechanical and Commercial HVAC Services Expertise & Capabilities


NEMSI's mechanical professionals have the knowledge and experience to satisfy even the most demanding commercial mechanical, commercial heating, and commercial HVAC repair needs. NEMSI’s experience includes:

  • Commercial air conditioning systems for all types of buildings and uses
  • Extensive experience with pharmaceutical and biotechnology laboratory clean room environments
  • Extensive experience in "state-of-the-art" new office or retrofit office HVAC systems
  • Extensive experience in warehouse HVAC systems
  • Extensive experience in industrial, institutional, and process systems
  • Commercial sheet metal fabrication and installation capabilities
  • Resources to provide commercial HVAC, plumbing, and process piping installations
  • Conceptual budgeting to final guaranteed cost proposals
  • Complete in-house mechanical engineering
  • In-house professional engineers, registered in Connecticut and Massachusetts
  • Energy rebate audits integrated within mechanical design-build capabilities
  • Single source in-house electrical, building automation, maintenance and facilities operation resources

NEMSI’s licensed tradespeople are experienced in the full range of commercial HVAC and industrial HVAC mechanical maintenance installations. Contact us today.