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management of energy and materials in the life cycle of a designed system ecological interactions in the recovery of the designed systems ecological interactions in the operation ,ind consumption ol the designed systems ecological interactions in the provision of the physical substance and lorm ot the designed systems ol Ihe designed systems input used in site rehabilitation, recolonisation by species, site recovery input used in recovery processes input used in preparation for recycling, reuse, reconstruction, and/or disposal and safe discharge into the environment input used in removal demolition inputs in the recovery phase input used in operation of built system, maintenance, ecosystem protection measures, system modifications, etc input used in construction and site modification input used in distribution, storage, transport to site inputs used in the production ot the building elements and components (including extraction, preparation, manufacturing processes, etc)

inputs in the operation phase inputs in the construction phase inputs in the production phase waterfront house

In one sense, the UMNO Tower belongs to the family of 'thin' plan types exemplified by Central Plaza and Menara TA1, both in Kuala Lumpur.

And, while all three demonstrate certain principles and witness Yeang's great skill in delivering a commercial product in a harsh market place, with added values beyond the client's expectation, the UMNO Tower stands apart. The reason for this lies in the realm of applied natural ventilation, its dynamic effect upon the building form, and the factor of aesthetic development this innovation has brought to Yeang's pursuit of an ecological architecture, situated within the skyscraper.

The composition of the UMNO Tower takes the familiar format of a base, with banking hall auditorium and car-parking levels, together with 14 floors of office space above.

The plan-form makes the best of a restricted narrow corner site with one massive shield-wall of elevators, services and of end-to-end staircases facing east/south east, defending the space from solar gain The opposite west/north west facade is glazed and shielded with solar-orientated linear solar shades. For Yeang these design moves are natural and common place within his work. However, what makes the design exceptional is the formation of the two extreme ends of the plan.

In these key locations, relative to the wind-rose and prevailing winds, Yeang has introduced soaring vertical wall-fins that he describes as "wind wing-walls' that direct wind to special balcony zones and act as pockets with 'air locks' for natural ventilation via opening, full-height sliding doors.

air-c subs mea vent a ba< build powe toget ventil the se and tf in orie buildir results energy Asn and bn, reSOlutli fienerat from stL Sun pan yeang-s he has al e*Pressj\, the*e f0r< architectu

Penang, Malaysia ^^

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