@Iz1
"Obviously it's easier to critique a recommendation than to take the time to look things up like I did."
Next time, do your part and communicate clearly what you are talking about.
Who's "Rick"? Astley, Springfield? A last name might help.
What is "HFC"? Hydrofluorocarbon is what a Google search comes up with.
Why should we need to do research just to figure out what the heck you are trying to say.