Hey guys, I had an "interesting" talk today with an insurance adjuster for a customer of mine. The customers outdoor unit was damaged beyond repair in a hail storm and the indoor equipment is ancient. I gave the customer a quote to replace everything since we no longer have any R-22 equipment in Oklahoma. The adjuster asked why i would need to replace everything and i proceeded to tell him about the incapability of 410 with 22...gave him the whole spill. He then informed me that i was trying to rip of the insurance company and that he has experience as an hvac tech in Chicago and that there is way to install a...and these are his words...thermal expanding valve( i assume he is talking about and expansion valve) on the indoor coil, and install a 410 condensing unit on a old (1972) system. Did i miss the memo on this thing...has anyone heard of anyway to convert ANY existing r-22 coil. My understanding is once you go r-22 that's it.