Customer Review

Reviewed in the United States on March 2, 2019
I knew about basic a/c and heating systems but nothing to become an hvac tech. Took the exam prior to this book and failed miserably, I think i scored 22. Once I read and understood how an a/c system works then I passed and I am not booksmart. There is a few schemtic diagram questions on here, but mostly a/c cooling questions.
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Product Details

4.7 out of 5 stars
4.7 out of 5
110 customer ratings