BUILDING DESIGN
‘The project is already registered with the Green Building Certification Institute (GBCI) for LEED Certification under the NCV3 2009 format and is aiming to reach the ‘GOLD’ certification standard.’
Longitudinal schematic of the CITO facility.
until late March – which is a great help to achieve water efficient landscapes. The green roof´s substrate was composed
specifically for the project, providing high rain water storage capability, to decrease storm water runoff and to have this water available for plant use. The expanded metal deck floats over the
planting, providing users with a place to enjoy the green roof, but at the same time, it avoids the need to reduce planting area, as a wood deck might cause. The green walls, both surrounding the
green roof as in the great arch that crowns the building´s top floors, are materialised by a metal trellis structure, vines and climbers. This helps avoid the need for ferti- irrigation, as happens with mural green walls. Climbers and vines used for the project are hardy and fast growing, and are fully adapted to the local weather conditions. The arch also helps minimise the heat island effect, as it provides shade to the top floors and balconies, without the need for supplemental irrigation. As a result of the integrative
design process between landscape architecture and architecture, the site is now provided with 16% of vegetated open space.
Water efficiency strategies The management of storm water has resulted in a significant reduction in the use of potable water. The water efficiency strategies include a vegetated roof on the second floor, which absorbs 50% of the storm water runoff.
IFHE DIGEST 2015
The remainder goes to the storm water storage tank, which is used by the irrigation system. In terms of grey water, 100% of the HVAC
condensate water is being treated on site, this saving strategy will cover approximately 40% of the flush fixtures demand. Also, high efficiency fixtures have been
installed – for example dual flush toilets, high efficiency sensor faucets for all lavatories, high efficiency sensor faucets with temperature control for all medical sinks, flow restricting devices for all shower heads and kitchen sinks, and metered urinals. All of these saving strategies have provided
a total of 60% of water saving over the LEED benchmark.
Energy efficiency strategies Passive strategies include: • Direct solar radiation – The combined action of louvers and the facade’s own morphology, which decreases its glazed surface as it grows in height, lets more direct sunlight into public areas and consultation rooms, protecting the upper floors where the surgery rooms and technical areas are.
• Appropriate thermal insulation for the building envelope – The double glazing
• Natural lighting – Even though this building is located in a dense city where buildings are built between shared walls, there is still natural lighting through the use of skylights to bring natural light to hallways and waiting rooms. Combined with the glazing of the front and back facades, this helps reduce daytime energy consumption.
used both in the front and back facades, and the high performance thermal insulation applied to all exterior walls provide a minimum loss of room temperature. This, with the help of the vegetated roof decreases the need for the use HVAC systems.
Active strategies include: • HVAC system – The air conditioning system designed for this building is a Variable Refrigerant Volume (VRF) with heat recovery system. These systems combine the high performance of the original heat pump VRF with the flexibility of the heat recovery, with the possibility of quick change over between cool and heat depending on the demand, and individual. VRF heat recovery systems are the most efficient in the market, and the refrigerant is R 410 a. Outside fresh air is drawn into the
The addition of an art gallery provides the facility with a cultural focus.
building through an outside air intake fan situated on the second floor. Outside air was calculated based on standard ASHRAE 62.1-2007 plus 30% so as to comply with LEED standards. All VRF inside units count with MERV 8 filters, so as to comply with standard ASHRAE 62.1-2007, while all outdoor air intake fans count with MERV 13 filters in the intake.
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