There's no question that the new law that outlaws the manufacture of R22 machines in 2010 is going to create a lot of chaos. I would like to submit these questions for discussion:
Is 410 refrigerant ventable? If it is not, why is it better then R22? If it's not ventable it must also be harmful to the atmosphere just like R22 so what's the purpose of making this change?
If the manufacture of R22 machines are outlawed in 2010, does that mean that if a compressor fails, a serviceman must rip out the indoor blower unit, the condenser and all the piping and replace it all with a R410 machine? Imagine how many existing R22 machines there are in the country and think about high rise buildings sometimes with several floors of piping. I wonder if the government itself will comply with it's own law in their buildings? They certainly can't afford that expense no more than the average homeowner.
R-401 machines operate with a high side pressure of 450-500 pounds. Is this something that belongs in a house?
R-12 in cars eventually outdated itself because cars have a short lifespan. Houses have long lifespans and really do not outdate themselves so there is no comparison between what happened to r-12 and what's going on now.
As a technician I just don't see how outlawing R-22 machines can work. They'll be too much chaos. I believe that a drop-in refrigerant is the only solution possible.