CAE Plant and Head Office

CAE Plant and Head Office

Located in Montreal, CAE’s plant has a surface area of more than one million square feet. The rooftop was covered in an extensive array of 150 decentralized HVAC units providing ventilation, heating, and cooling throughout the building. Most of these HVAC units had already reached the end of their useful lives. Rather than simply replacing the equipment, CAE decided to leverage its building’s energy savings potential.

CAE partnered with Ecosystem to implement a deep energy retrofit that addressed key goals in efficiency and functionality: significant energy savings, a simplified HVAC system, and ease of operation and maintenance for CAE staff. To meet these targets, Ecosystem designed and installed a centralized heat recovery system, and the number of HVAC units was reduced by 75%. The extensive re-engineering of the building infrastructure included high-performance heating and cooling equipment that operate based on demand, and a new management system for centralized controls to maximize operational flexibility.

The project has delivered: systems reliability has greatly improved and CAE’s annual heating bill alone has been cut by 75%.

  • 31%

    Energy Bill Reduction

  • 2013-2014

    Project Period

  • $909,500

    Guaranteed Annual Savings

  • $3.1M

    Guaranteed Incentives


Replacing 150 rooftop HVAC units by only 38 units was a major undertaking in efficient design.

Ecosystem succeeded in coordinating project implementation without any effects on the plant’s productivity, while also respecting the regulations of the nearby Montreal-Trudeau Airport during the rooftop construction work.


2017 Énergia Award, AQME

2016 Leadership Award from CIPEC (Canadian Industry Program for Energy Conservation), Natural Resources Canada

Customized Performance Measures

Rooftop HVAC Units

Replacement of aging energy-intensive units by modern, centralized equipment. The redesign of the heating, cooling, and ventilation systems enabled the number of rooftop HVAC units to drop from 150 to 38.

Heat Recovery

Heat from the servers and flight simulators is now recovered and reused for the plant’s heating.

Efficient Hot Water Boilers

Addition of hot water boilers to supplement the new heat recovery system.

Centralized Controls

Upgrade of Building Automation System in order to maintain occupant comfort and better manage energy consumption.