Safety and Shipping Classification - Chart at the bottom shows the safety classification of each refrigerant.

EPA Certification – suggested method of approach.

Open the ‘EPA Manual (EPA in Adobe Reader Go to ‘View’, ‘Read Out Loud’, and ‘Activate Read Out Loud’. Go to ‘View’, ‘Read Out Loud’, and ‘Read To End Of Document’. Listen to the document. You can do the same to the ‘608 Prep Manual (ESCO)’. Then go through each Test. The test are from the EPA test questions a few years ago. Go through them until you are comfortable with it.

I suggest downloading Natural Leader to read the study guide out load. The basic program is free.