Armed with a diploma in air conditioning and refrigeration, Shankar Kumar Chatterjee joined Voltas Limited, a Tata enterprise, in 1977. He served the company in various capacities in its Kolkata, Delhi and Mumbai branches, executing and heading HVAC&R projects. He shifted to the Emirates Trading Agency (ETA), Dubai, in 2003 to head three massive district cooling projects. One of them was the 42,000 TR DCP-1, which included a thermal storage system catering to the chilled water requirements of The Burj â the world's tallest tower and one of its most iconic buildings â and several other important buildings in downtown Dubai. In 2010, he returned to India to join Sterling and Wilson as the general manager of HVAC projects in its Kolkata branch, from where he superannuated in 2013 at the age of 65. Thereafter, he took up a one-year special assignment with Al-Futtaim, Dubai, as a senior project manager for a district cooling project in Qatar. During his tenure of 37 years, he handled almost all types and capacities of HVAC&R systems, including marine installations such as frigates for the Indian Navy â the largest warships built in the country till that point of time â at Garden Reach Shipbuilders & Engineers Limited (GRSE), Kolkata. This book is the distillate of Shankar Chatterjeeâs five decades of hands-on experience.