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Any HVAC experts want to weigh in on something...
My parents in DFW have an old system that it appears the evap/coils on the air handler are shot. It's an R22 system and they are trying to see if it is worth upgrading to r410 now. My question is... could they replace the evap/coils on the air handler and then also just replace the condenser on the heat pump and get away with a cheapish conversion to r410 or will they need to run new lines and replace the whole air handler and heat pump.
The other option is to just replace the evap/coils and stay R22 but that seems like a pretty big expense to not just go ahead and upgrade things.
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