I have used r22a in three unit in summer 2012. Just to test it. It is propane,but it works. Can not be mixed. Use 1oz 22a for 2 1/2 of r22. Homeowner said his elec. bill was down by 30%. pressure about the same on low side and lower on the high side.
I can't say I'm against it really. I just dont think any Joe schmoe should use it. Most people are stupid. I would just rather have equipment rated for it and know where it is. Might just be a lot better than 410A.
Was at the Farm store this afternoon( Rural King Supply) Large display set up with a video running promoting it. Do it yourself. Law suits waiting to happen. As far as I know Opening an A/C system requires certification. Thats screwing on a fitting opening the schrader. Going to be interesting ou there. Be SAFE.
Nice video isn't it. I scratched my head and watched it again. I never knew this stuff was so easy.