Copeland and r1150

Guys I had a question asked that I dont know the answer to and was hoping some of you industry guys can answer for me.

The question is a little vague but Im assuming the company asking reached out to Copeland and Copeland told them not to use r1150. Heres the question:


Why does Copeland consider R1150 to be such a big issue? Would we be better off using R23?

http://www.google.com/url?sa=t&rct=j...55534169,d.aWM