Seneca College of Applied Arts and Technology

Located on the King City campus, Garriock Hall renovations are part of Seneca’s on-going expansion. The retrofitted heating system provides improved comfort for the campus’ 5,200 students.

HH Angus was engaged as prime consultant for a retrofit at one of the campus’ main academic buildings. Our scope included replacement and upgrade to:

• Twelve fan coil units, complete with additional coil elements
• Approximately 30 hot water cabinet unit heaters located throughout the building, along with additional Building Automation System (BAS) integration
• Dual-duct terminal boxes for approximately 2/3’s of the building. The terminal boxes themselves were upgraded from pneumatically controlled to digital controlled complete with BAS integration.
• Domestic hot water system
• Pool heating system

The project used low temperature heating water from a ground-source heat pump system. This increased the physical size of the replacement heaters, which required accompanying structural and architectural modifications.

Domestic hot water preheat was implemented to take advantage of the low temperature heating water from the heat pump system, and was implemented as part of the domestic hot water system replacement and upgrade. The upgrades included a new high efficiency condensing water heater paired with a heating water to domestic water heat exchanger.

The pool heating system was not operational prior to the project. It was made functional and upgraded to take advantage of the low temperature heating water available from the heat pump system, by replacing the heat exchanger and adding additional controls. 

Dual duct terminal boxes upgrades included replacing the terminal boxes to implement Variable Air Volume (VAV) control. In a few areas, existing single duct VAV terminal boxes were replaced with those equipped with reheat coils to facilitate occupant comfort.

The project timeline was aggressive, with engineering design starting late May 2019 and tendering in late August 2019. The project took advantage of the 2019 Christmas break to complete the majority of construction in order to minimize impacts to the occupants.

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