Eco Commercial Building (ECB) Bayer Material Science
Passive Design Strategies
Detailed analysis of environmental conditions were conducted to choose a orientation that would optimize building energy performance. The building form helps reduce heat gain or loss.
Native and indigenous species were selected for landscaping, eliminating the need for regular irrigation. To help establish the new landscaping, plants were watered twice a day for the first two years.
Daylighting is maximized in all occupied spaces. Appropriate shading devices designed through simulation software are used to minimize glare. Integrated motorised blinds are used for occupant’s visual comfort.
A design ventilation rate of 30% additional outdoor air over that specified in ASHRAE Standard 62.1-2004 enhances the indoor air quality within the building and provides superior occupant comfort. Passive design features resulted in a total diversified AC load of 84 kW for 891 m2 (24 tons for 9,600 ft2).
- Building Envelope and Fenestration:
- Climatically responsive façade design, including a roof that projects beyond all four sides of the building, protecting it from direct sun and reducing heat gain.
- All external surfaces, including the walls, roof and foundation, are insulated on the exterior using polyurethane panels.
- Exterior wall assembly is composed of 150 mm (6 in.) autoclaved aerated concrete (AAC), fly-ash block work and 75 mm (3 in.) polyurethane foam (PUF).
- Roof insulation materials are 75 mm (3 in.) rigid polyurethane insulation and a 50 mm (2 in.) layer of mineral wool
- Window-to-wall ratio (WWR) is 33.8%, which helps ensure maximum daylighting potential with minimum solar heat gains.
- High performance envelope insulation leads to 40% reduction in energy use compared with the ASHRAE/ IESNA Standard 90.1-2004 baseline.
- High performance double glazed windows with integrated motorized blinds provide improved protection against sunlight. Efficient glazing balances the low thermal conductivity and shading coefficient.
- Materials and Constructions Techniques:
- The building uses regional building materials with recycled content.
- Low VOC paints, sealants, coatings and adhesives have been used wherever possible.