I am in the process of getting bids to replace 3 separate split heat pump systems in my house. Four guys have come to the house representing different companies (Trane, Carrier, Lennox, Bryant). They have looked around and presented me with a proposal. The fifth (and hopefully last) guy came today (the local American Standard distributor) and for the first time I was told that the size of the refrigerant liquid line that is currently installed in my house is 1/4" and that most all new systems use 3/8" (he said he thought Trane may still have a system that uses 1/4").
As I said, I have three separate systems. Replacing the line set on one of these is no problem. Replacing the line set on the other two are big and bigger problems due to the location of the air handlers. The HVAC guy left a bit ago to make some calls to get some options and said he would get back with me tomorrow.
In the meantime, I would like to solicit some comments on possible solutions. Thanks in advance!