ITC Maurya in Delhi was the worlds first hotel to have been awarded Platinum rating under the LEED Existing Building (EB) programme. Despite the fact that the hotel wasnt built according to any green building classification over three decades ago, it has led by example in this domain. It uses 23% less energy than the US Green Building Councils national average for large-size luxury hotels. Its HVAC (heating, ventilation and air conditioning), thermal, water management and building management systems underwent retro-commissioning to enhance performance efficiencies. Apart from usual measures like using CFLs and LEDs for lighting and utilising natural light wherever possible, the hotel has taken many unique steps to go green.
It relies on an automated online energy management system that has negligible human intervention and saves about 15% in terms of energy consumption over a manual system. Waste management, too, is taken seriously as almost 100% of the total solid waste is either reused or recycled through recycling programmes or converted into manure by an organic waste converter.
The hotel also uses a solar thermal system for hot water and low-pressure steam application. Under its renewable energy projects, ITC Maurya has installed the Fresnel Paraboloid Solar Concentrating Reflector, which has specially-protected glass reflectors and built-in safety controls, and requires minimum operator intervention and maintenance. ITC Mauryas water conservation and reuse practices, too, have been widely appreciated over the last few years. Only treated recycled water is used for landscape, cooling tower and miscellaneous cleaning. The excess treated recycled water is given to civic bodies for irrigation of landscapes, gardens and forests. The hotel has also installed a rain water harvesting system to recharge the groundwater table with a potential to harvest up to 11,731 kl per annum (with an average annual rainfall of 690mm). Our sewage treatment plant recycles grey water to near-potable quality and this water is used for various cleaning and horticulture applications within the hotel and even given to other agencies. Because of our water harvesting efforts, the water table in the area has risen visibly since its implementation in 2007. Compared with conventional hotels, we are using 30% less energy and almost 40% less water, says S Arunaachalam, chief engineer, ITC Maurya.