The mechanical systems serving the facility consist of a Tier III chilled water variable primary system for the critical data centre areas, complemented by air-to-air heat pump systems for the office and support spaces. The chilled water plant includes six 400-ton air-cooled chillers located in the exterior equipment yard, providing approximately 5,000 kW of cooling capacity in an N+1 configuration. The system is designed for phased implementation, with the initial 2.0 MW installation supported by three chillers, and an additional 400-ton chiller added for each incremental 1.0 MW of load growth. To support energy efficiency through water-side economization, twenty 343-ton dry coolers are installed during Phase One, with one additional unit added in both Phase Three and Phase Four. The variable primary pumping system is housed within a factory-supplied outdoor enclosure and consists of six split-coupled in-line chilled water pumps arranged in an N+1 configuration, each rated at approximately 600 GPM. Similar to the chiller strategy, the initial phase includes three pumps, with one additional pump installed for each subsequent 1.0 MW expansion. The main chilled water distribution loop is routed beneath the raised floor, with valving configured to isolate no more than three CRAH units at a time, supporting maintainability and system resilience. The facility includes thirty chilled water CRAH units for the initial 2.0 MW build-out, expanding to a total of sixty units upon completion of the full 5.0 MW capacity. Ventilation and pressurization are provided by two dedicated outdoor air units located in the equipment yard, in accordance with code requirements. Humidity control within the data centre is achieved with wall-mounted ultrasonic humidifiers supplied by a skid-mounted deionized water system. The office and loading dock areas are conditioned with split system heat pumps with air-cooled condensers located on the roof and horizontal air handling units. Each diesel generator is equipped with a 7,000-gallon belly tank, exceeding the Uptime Institute’s requirement for 12-hour concurrently maintainable runtime. This 100,000-square-foot data centre was designed to support up to 5.0 MW of IT load, addressing the growing demand for secure colocation, managed hosting, and cloud services in Canada. Delivered as a fast-track project, the facility utilizes an exterior cooling plant integrated with CRAC/CRAH systems to accelerate construction while maintaining high performance standards. From a mechanical execution standpoint, the project incorporated a number of key strategies to meet schedule and performance objectives. These included the installation of a new exterior fuel oil system for the generators, extensive use of prefabricated piping to address tight timelines, and the coordination and installation of the chilled water piping network beneath the raised floor. The scope also included installation and integration of domestic water, sanitary, and storm systems with existing infrastructure, as well as reverse osmosis and humidification systems. Additional work included heat tracing for exterior plant components, full HVAC system installation and integration with owner-supplied equipment, and the installation of split system air conditioning units for the office and loading dock areas.