By the time I decided to start writing this book, I had worked in the HVAC & R industry for more than forty-five years. In this span of time, I had worked as a service technician in an NYC service company and as a trade instructor in several schools (see profile). I had written books and works; among them are RAC & E test-books, preparation for the EPAs certification, and the RMO's License for the NYC Fire Department, which had been used in the schools in which I worked. Regardless of the years that had passed, the refrigeration system used in Air Conditioning, systems as well as in...

By the time I decided to start writing this book, I had worked in the HVAC & R industry for more than forty-five years. In this span of time, I had worked as a service technician in an NYC service company and as a trade instructor in several schools (see profile). I had written books and works; among them are RAC & E test-books, preparation for the EPAs certification, and the RMO's License for the NYC Fire Department, which had been used in the schools in which I worked. Regardless of the years that had passed, the refrigeration system used in Air Conditioning, systems as well as in...