Green buildings based on the premise of increased efficiency and minimal wastage are eco-friendly and more cost-efficient.
Many end-users and investors shy away from green building technologies due to misplaced notions of cost overruns and impracticability of construction. The notion that green buildings are 'costlier' impacts the profit motive that lies behind
real estate, prompting both builder and investor to stick to conventional methods of construction. To dispel this myth and promote sustainability, the concept of green buildings and its cost effectiveness during its lifecycle needs to be understood.
GREEN BUILDING
A green building is based on the premise of increased efficiency and minimal wastage during its lifecycle. It addresses aspects such as health, environment and resource conservation, while maintaining economy. Thus, it focuses on reduced energy consumption, reduction and recycling of produced waste, reduced emission of pollutants into the environment, minimizing construction impacts, and healthier and more productive indoor environment.
COST FACTOR
While the initial cost of a green building may be slightly higher as compared to a conventional building, the operational cost is lower because of their reduced energy consumption feature. For instance, the energy requirement of a green building can be just 15 percent of a conventional building in some cases. This makes them very cost-effective in the long run as the initial higher cost is more than recovered within a short span of it being operational.
RETURNS
In terms of rentals as well as capital gains, green buildings have an advantage because of reduced operational cost and higher productivity of employees. All modern techniques, building design and usability of space can be incorporated into a green building. In the demolition phase too, these buildings are suitable for recycling, minimizing waste. Some of these are built to adapt to different uses, eliminating the need to demolish.
Studies have shown that the average construction cost premium for green buildings is less than two percent while the reduction in annual operational cost is 30-40 percent as compared to a conventional building. Add to this the quantifiable and nonquantifiable benefits and the fact that they are feasible anywhere in the world, green buildings then become extremely attractive economically.
SUSTAINABILITY
Green buildings can be simple and down to earth, or modern and ultra elite. Simple techniques like incorporating a green roof which substantially insulates and cools interiors, besides cutting down on urban heat island effect, designing to take advantage of wind and sun in terms of energy, light and ventilation, going in for indoor plants such as the Areca Palm which releases sufficient amounts of moisture into the air and flushes out toxins, go a long way in making buildings sustainable.
As for
residential complexes, large savings on energy and operational cost can prove extremely attractive in terms of both rentals and investment.
Green buildings essentially evolve based on specific local conditions, working them to their advantage and sustainability. In a city like Bangalore, green buildings could address aspects such as ventilation, heat and light by adopting a suitable facade and orientation.
For instance, usage of higher technology glass along with right orientation would keep the heat out while allowing sufficient light.
The IT developments could incorporate displacement ventilation for better quality air, which also saves energy. Large
residential complexes could structure the building to take advantage of wind, allowing natural ventilation. The site too could be designed to be cooler with trees and water bodies. A clever design with glass and concrete would allow plenty of natural light while still maintaining privacy.
Courtesy: ET dated: 13th June 2008