|  | Audel Technical Trades Series |
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Brumbaugh, James E. Audel HVAC Fundamentals Volume 1: Heating Systems, Furnaces and Boilers, All New ISBN 978-0-7645-4206-0
Brumbaugh, James E. Audel HVAC Fundamentals Volume 2: Heating System Components, Gas and Oil Burners, and Automatic Controls, All New ISBN 978-0-7645-4207-7
Brumbaugh, James E. Audel HVAC Fundamentals Volume 3: Air Conditioning, Heat Pumps and Distribution Systems, All New ISBN 978-0-7645-4208-4
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