410A Condenser and R22 Evaporator Coil

[Richard M. Ross]

I just inspected a home with a Goodman 410a rated condenser and a R22 rated evaporator coil (Air Handler). The combination has been working for one year and the temperature differential was 14 to 16 degrees F.

What is the down side of this combination? I have received responses from two different HVAC contractors, one said it was ok if a valve was changed and another said it might blow up.

Thank you,

[Robert J. OConnor]

For something like that the manufacturer should be contacted

[David A. Andersen]

the metering device is most critical, but generally the design of one coil may not be adequate to replace that of another. it is way beyond anything you can do and it is also way beyond what most field technicians can do. This is a laboratory evaluation and as posted, the manufacturers should be consulted as that's what they do for a living.

Water and air are both fluids but that doesn't mean boats can fly !