Air Conditioning and Refrigeration

A complete reference book on refrigeration and air conditioning, covering the refrigeration cycle, refrigerants, system components, air conditioning, and hands on servicing. One of the most comprehensive free titles in this list.

SCERT

University lecture notes that build refrigeration and air conditioning from the ground up, unit by unit. Covers vapor compression and absorption systems, refrigerants, psychrometry, and cooling load with worked detail.

Institute of Aeronautical Engineering

A focused chapter on HVAC and refrigeration systems, covering the vapor compression cycle, refrigerants, coefficient of performance, and vapor absorption systems. Includes the factors that affect performance and where energy savings come from.

Bureau of Energy Efficiency

A reference chapter on refrigerants, their properties, performance, and safety classifications, plus the phaseout of ozone depleting substances. A handy technical guide to choosing the right working fluid.

ASHRAE