So you run your two HX's in series huh? Don't you get so much heat loss that by the time it gets to your floor lines, it's pretty cool?
Or do you not have any floor lines.
Does anybody here have 2 HX's and floor lines? If so can you draw up what you did.
Here's another thought...I could easily pull everything off the system but the 2nd HX. So it would run in from the OWB on 1" PEX, then reduce down to 3/4" PEX go through the smaller HX, then back, go back up to 1" PEX and out to the OWB.
That would shouldn't lose much temp with the furnace fan on right? I'm just trying to figure out a way to use all that 3/4" PEX I got ran through my basement now....