3 LEED Certified Projects in Pakistan
The concept of Green building Design is to minimize total building energy consumption through series of design strategies. Following green building strategies must be considered:
- PASSIVE DESIGN
- ENERGY EFICENCY
- WATER EFIECNECY
- WASTE MANAGMENT SYSTEM
- INDOOR AIR QUALITY
The orientation of the building is defined by the sun moment. It is the major key which defines the heat gain.
- East/West facades of the building will receives the maximum heat from the sun in summer . It is preferred t to have minimum glazing. Vertical louvers or fins are most effective for east/west facades.
- Horizontal louvers should be used to shade the sun on Southern Facades. The sun angle is high at noon ,Horizontal shades are effective on southern facades of the building.
- North Elevation receives the minimum Sun Light and almost no direct light in winters.
Therefore its best to have offices facing south with horizontal shades as it will minimize the artificial lighting.
Proper orientation helps to reduce heat load which reduces energy load in cooling the building. Use of Lighting sensors in offices helps to reduce the use of artificial lighting. Efficient HVAC equipment are in market which have low energy consumption. Variable refrigerant flow technology helps to minimize he energy consumption.
Minimizing heat intake on roof by providing GREEN ROOFS. 60 % OF heat intake in building is though roof. Using Roof insulation greatly reduce the heat intake.
Walls must be constructed with hollow concrete blocks as Air is a great insulator of heat.
Water consumption in building can be reduced efficient fixtures.
For example Water closets with GREEN label use less water per flush. Hence reducing the overall water requirement for the building.
One of the other technique is the Reuse water. Water from wash basin and shower cabins is knows as gray water and is considered fit for landscape and irrigation purpose. Hence reducing the amount sewerage .
WASTE MANAGEMENT SYSTEM
Waste management is simply known as recycling. Providing different waste bins for waste which is then send to recycling is an important part of GREEN BUILDING.
- Recycling Bin for plastic bottles
- recycling bin for Paper
- Recycling bin for Tissue Paper.
Waste management is not only part of building maintenance and operation, it is also be considered during building construction.
INDOOR AIR QUALITY:
Indoor air quality is an important aspect in a green building approach especially in a healthcare project.
Using Low VOC’S paints, adhesives, Vinyl flooring and Green Label Carpets provide better indoor air quality and improves the habitats health. Indoor air quality also means providing efficient lighting, Cooling & Heating.
Extra lighting and cooling can be disturbing and increase Energy load of the building. Smart building
3 LEED Certified Projects in Pakistan
The British Council Lahore Library has been constructed in an energy efficient design that saves 35% on water, air-conditioning and lighting. The premises relies mostly on natural light during the day, and has a green roof that contributes to the environment and minimizes heat. The building has been awarded LEED Gold Certification from United States Green Building Council – USGBC.
During construction of the tower all necessary steps were followed to achieve silver LEED Certification. The LEED is a set of rating systems for design, construction, operation and maintenance of green buildings and neighbourhoods which has been developed by US GREEN building council to help building owners and operators be environmentally responsible and use resources/energy efficient resulting in cost saving and positive community impact as an example of this the building has been designed to minimize suns heating effect by maximizing the surface area of its façade on its northern side. Additionally mega corporate tower is designed with raised flooring and under floor air distribution system that results in efficient productivity of its HVAC system and improved ventilation /indoor air quality.
Complete reconstruction and renovation of the Main Building and the Annex Building of the World Bank office in Sector G5, Islamabad, including all civil works, structural reinforcement, plumbing, electrical, HVAC, fire-fighting, security, landscaping and external works to 5-star quality standards and meeting LEED V4 Gold- certification requirements.