Projects
Ontario College of Art & Design (OCAD) - Roof Top Unit Replacement
Completion: December 29, 2015
Location: Toronto
This project involved the replacement of two roof top air handling units that served the 11 floor building at 230 Richmond Street West in Toronto. At the same time the entire roof was replaced with new roofing materials and flashings by the general contractor. Cooling by the new air handling units was achieved through the use of a refrigerant Dx coil and a separate air cooled condenser unit. Heating by the new air handling units was achieved by glycol coils and the installation of a small heating plant in the penthouse storage room. Previously, the old air handling units had electric heating coils installed in them. The new plant consisted of two circulating pumps, a steam to glycol heat exchanger, glycol mixing tank and a steam pressure reducing station. A high pressure steam line, tied into the existing building main line in the P1 parking level was installed up an existing shaft to the penthouse level. A supply and return glycol riser was installed down to the 7th floor for future use when the air handling units in an adjacent building will be replaced.
Mechanical Systems
Kelson mechanical highlights:
Two street closure and hoisting permits were obtained from the City of Toronto to hoist the sections of the new air handling units, on two separate dates. Kelson coordinated with the roofing crew to ensure their work proceeded ahead of our installation of the equipment curb and air handling unit placement.