For fifty years this book (previously the 'Handbook of Heating, Ventilating and Air Conditioning') has been accepted as a concise, definitive reference for the day-to-day work of the engineer or technician engaged on the design of HVAC systems, domestic hot and cold water services, gas supply and steam services. Changes made for this edition include additional material in the air conditioning section to provide data for recently introduced systems, and a further increase in the range of U-values to cover modern wall constructions and internal partitions. There is more information on expansion of gases and information has been added on replacement refrigerants for CFCs and HCFCs. Rather than having to work through pages of theory to extract the required data in a usable form, the reader is presented with brief summaries of the various types of system which can be considered, together with the formulae, physical constants and typical design parameters needed for actual design and estimating. This information is backed up by a comprehensive bibliography and list of British, European and International Standards.