In contrast to conventional North American office buildings which use recirculated air, Manitoba Hydro Place is filled with 100% fresh air, 24 hours a day, year round, regardless of outside temperatures. Within the splay of the two towers, a series of three six-storey south atria, or winter gardens, form the lungs of the building, drawing in outside air and pre-conditioning it before it enters the workspaces through adjustable vents in the raised floor. Depending on the season, 24 metre tall ‘waterfall’ features in each of the atria humidify or dehumidify the incoming air. During colder temperatures, recovered heat from exhaust air, and passive solar radiant energy are used to warm the fresh air. The conditioned air is drawn through the raised floors into the office spaces through underfloor fan units. Occupants and computers and other sources of heat cause air to rise, which is then drawn north and exhausted by the solar chimney. In the shoulder seasons, the building relies solely on outdoor fresh air through the use of automatic and manually operated windows.
Related Performance Goals:
Energy Performance-Sustainable Design
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