Audel HVAC Fundamentals, Volume 2: Heating System Components, Gas and Oil Burners, and Automatic Controls, Edition 4

Audel HVAC Fundamentals, Volume 1: Heating Systems, Furnaces and Boilers, Edition 4

Audel HVAC Fundamentals, Volume 3: Air Conditioning, Heat Pumps and Distribution Systems, Edition 4

Audel Welding Pocket Reference