High Performing Buildings - Fall 2011 - (Page 11)

approach at Manitoba Hydro Place, and has become an iconic image of downtown Winnipeg. ‘Lungs’ of the Building The three stacked, six-story high winter gardens — large, unconditioned spatial volumes — are unique in the context of hermetically sealed North American office buildings. They are the “lungs” of the building and responsible for providing 100% fresh air every day throughout the year. In the winter, fan coils fill the winter garden with outside air preheated to 5°C (41°F). The expansive south-facing curtain wall (more than 400 m² [4300 ft2] in area) allows Winnipeg’s abundant winter sun to provide the remaining sensible heat. Humidification is provided by a 24 m (79 ft) tall water curtain k e y S uS taI na BL e FeatuReS Water Conservation low flow fixtures dual-flush water closets Waterless urinals rainwater and condensate capture and storage for irrigation Recycled Materials 24% of construction materials overall, including: Concrete (73%) reinforcing steel (100%) Access floor (17%) shades (60%) interior demountable walls (82%) Carpet tiles (45%) outdoor decking (90%) Bike racks (25%) Acoustical wall treatment (85%) Daylighting 85% of regularly occupied area with daylight factor above 2% Tall and narrow lofts (3.1 m × 11.5 m) with stepped double façade design and an open floor plan allows excellent daylight autonomy Individual Controls manually operated window vents exterior shading (extension and tilt) lighting (fully dimmable) Other Major Sustainable Features deconstruction of existing site (more than 90% of material diverted from landfill) demand ventilation for variable occupancy areas Balanced geothermal field (equal heating and cooling on annual basis) Plug-in hybrid fleet vehicles for employees SIte pLan The decision to angle the tower on the site led to the creation of a uniquely shaped park on the southern portion of the site—now a popular green space in downtown Winnipeg. This, in addition to ground-level retail tenants, adds to the vibrancy of the area. composed of mylar ribbons. The ribbons maximize water feature surface area to encourage moisture exchange, and water is heated to 32°C (90°F) for humidification. In the summer, the winter garden fan coils are disabled, and operable vents bring fresh air into the building. Sun-tracking louver blinds are used to manage solar heating, and the temperature of the water feature is dropped to 10°C (50°F) for dehumidification. Throughout the year, natural stack effect distributes fresh air PerForming Buildings 11 © KPmB Architects Fa l l 2 0 1 1 HigH

Table of Contents for the Digital Edition of High Performing Buildings - Fall 2011

High Performing Buildings - Fall 2011
Commentary
Contents
Manitoba Hydro Place
Maplewood Police and Court Building
Omega Center for Sustainable Living
Dockside Synergy at Dockside Green
Golden Hill Office Center
Letters to the Editor
Products
Advertisers Index

High Performing Buildings - Fall 2011