tell me what the COP or duct (vent temp) of an R-22 system is over an R410a system.
Lets set some parameters:
outdoor ambient of 20 degrees and an inside temp of 70 degrees running HEAT PUMP ONLY no AUX heat involved.
Hope this is enough info to extrapolate a hypothesis (always wanted to use big words like that in a sentence!)
Having the same debate going on in my head right now as to what to put into my own house.