This 3 volume set from Audel is a must-have for anyone interested in Heating, Ventilating, and Air Conditioning (HVAC) systems. Written by James Brumbaugh, it covers a broad range of topics on HVAC and refrigeration in an easy to understand manner. The books are hardcover with illustrations and were published in 1977 as the first edition.

Also included is Refrigeration: Home and Commercial

The set is perfect for those looking to expand their knowledge on the subject or for professionals in the industry. It includes information on the basics of HVAC, including design principles, equipment, and maintenance, as well as advanced topics such as troubleshooting and energy conservation. The books are in good condition and written in English, making them accessible to a wide audience.