Let's take A/C operating temps of 45 degrees evaporating and 130 degrees condensing. With R22 pressures would run 76/297 and with R410A it would be 130/476. So if "doubling" is the standard, you'd end up with a little over double in suction pressure (152) and less than double in head pressure. A full 118 psi less.
Originally posted by brody
Thanks to all the repliers. I am now a very informed consumer I think. I do have a question about the R410 coolant. I have heard it has to be used with twice the amount of PSI's than R22. If this is true, have they redesigned all the coils to handle the increased pressure?