Books on HVAC and Refrigerant Concepts
There are many books you can find that will get you a head-start in HVAC and Refrigerant concepts.
RefrigerantHQ is a participant in the Amazon Services LLC Associates Program and The E-Bay Partner Program, affiliate advertising programs designed to provide a means for sites to earn advertising fees by advertising and linking to amazon.com or E-Bay.com. We do not directly sell any Refrigerant, but rather provide information, knowledge, and explanations to the consumer.
Please note that Environmental Protection Agency law requires certain individuals to be licensed before purchasing some refrigerants. You will be required to provide your certificate number or declare the item will be resold to an EPA certified technician on certain types of Refrigerant. (R-410A & R-134A are excluded from this.)