ESI ENVIRONMENTAL SYSTEMS INC.

Energy usage management

HVAC contractor services; Installation, maintenance and repair of HVAC systems, plumbing installations, refrigeration and water treatment systems; Installation, maintenance and repair of heating, ventilating and air conditioning equipment; Installation, maintenance and repair of polyvinylidene fluoride (PVDF) pipes, hydronic pipes, hydraulic pipes, chiller system pipes, biotech high purity pipes, environmental chamber pipes and tubing; Repair and installation services, namely, the installation of heating, cooling and environmental control systems

Calibration services to shock and altitude chambers, and vibration tables; Environmental testing and inspection services; Engineering services in the field of environmental compliance; Engineering services, namely, engineering for the HVAC industry; Custom design and engineering of HVAC units; Hydraulic and hydrologic engineering services, namely, modeling and designing pipelines and plumbing systems