A work from Cengage Learning on electricity and controls for HVAC-r.

Electricity & Controls for HVAC-R 2013, Cengage Learning

ISBN-13: 9781133278207

7th edition

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Electricity and Controls for HVAC-R 2009, Delmar Cengage Learning, Clifton Park

ISBN-13: 9781435486126

6th International edition

Paperback

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Electricity & Controls for HVAC-R 2005, Cengage Learning

ISBN-13: 9781401895136

5th Revised edition

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