High Performing Buildings - Fall 2013 - (Page 60)

Steelcase ©2013 building automation system (BAS) for monitoring and controlling HAVC equipment, energy consumption and environmental comfort. Envelope and Glazing Top Left These work spaces provide mobile workers access to phones, power and ample work surfaces. Top Right The building’s design offers abundant daylighting with incorporated daylight sensors for indirect/direct lighting. Ninety percent of occupied spaces have exterior views. Above Meeting rooms and offices in this tenant space have glass fronts, providing transparency, privacy and daylighting. Over 75% of wood used in the building is from Forest Stewardship Council certified sources. KEy SuStainablE FEaturES Water Conservation Low flow fixtures, native species landscaping and rain collecting cistern for urinal/toilet flushing and irrigation. Materials Construction waste diversion: 93%; one-fifth of materials regionally sourced; one-third of materials recycled. Daylighting Automated interior shades reduce glare and optimize daylight; 90% of spaces have an exterior view. Individual Controls Adjustable floor diffusers for ventilation air. Transportation Mitigation Strategies Located next to Union Station, a major public transportation hub. On-site bike rental provides convenient bicycle access for use throughout the downtown core. Other Major Sustainable Features Green roof terrace, green tenant guidelines, green housekeeping program. 60 air shaft served by two central makeup air units. Compartment VAV units located on each floor mix return air with outdoor air. Supply air is provided through floor diffusers via an underfloor distribution network. The ventilation air is controlled by CO2 sensors located in the return duct of each floor, four CO2 sensors located in the open office space and additional CO2 sensors in high density areas such as meeting rooms. Occupancy sensors also control ventilation supply, which is distributed through underfloor air diffusers that direct fresh air to the occupants. The ground floor, mezzanine floor and the third floor are served by three dedicated air-handling units with demand-control ventilation. CO2 sensors are located on the return duct and multiple CO2 sensors are located in densely populated areas. An independent direct digital control (DDC) system works as a The envelope primarily consists of curtain wall and spandrel panel with some masonry walls on the ground floor and mezzanine floor. The windows are insulated double glazed units (IGU), low e-coated, 0.75 in. argon (90%) filled gaps with thermal breaks. Automatic solar tracking interior blinds control solar gain and glare in the building. They also reduce heat loss in winter and heat gain in summer, saving energy. The U-value for windows is 0.34, while the spandrel panel has an effective insulation R-value of 4.5. The roof is type III, built-up roofing on concrete deck with an overall roof insulation of R-20. The foundation is comprised of a 26 in. concrete wall. Measuring and Verifying A microprocessor based electronic metering system is installed for tenant and base building sub-metering. It monitors lighting, receptacle and D i S t r i c t S t E a M H E at i n G S y S t E M Toronto’s district steam heating system supplies in excess of 626 MW of steam to more than 140 downtown institutional, commercial (including 25 York Street) and governmental buildings (representing over 40 million ft2). The system, operated by Enwave Energy Corporation, is powered by three steam plants, which can switch between natural gas or oil, depending on which is most available and cost effective. The oldest known district heating system dates back to the 1300s in ChaudesAigues Cantal, a village in France. The HigH Performing Buildings fa l l 2 0 1 3 townsfolk devised a method of distributing warm water through wooden pipes that is still in use today. The first commercial district heating system was created by Birdsill Holly in Lockport, N.Y., in 1877. Today, approximately 150 district energy systems of varying sizes operate in Canada. According to the International District Energy Association, some 5,000 district energy systems operate in the United States, heating and cooling roughly 8% of all commercial office space. Source: Enwave Energy Corporation

Table of Contents for the Digital Edition of High Performing Buildings - Fall 2013

High Performing Buildings - Fall 2013
Commentary
Contents
Alliance Center
Malaysia Energy Commission HQ (Diamond Building)
IAQ in HPB Case Studies
EcoCommercial Building, Noida
25 York Street
Technology
Advertisers Index

High Performing Buildings - Fall 2013