I ordered this study guide a few weeks before my scheduled A7 Heating and Air Conditioning ASE test. The content was easy to understand and very accurate. I wanted a refresher on HVAC systems to get the mind set to take the exam and this guide was perfect, I passed the test with flying colors. The one slight problem I found was there was no reference to the new Freon YF1234 in the guide, luckily there were no questions on the test about it. Great study guide for the price.
Verified purchase: Yes | Condition: New
very good product which boost test taking skills !!!
Verified purchase: Yes | Condition: New
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