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Thanks, upon further discussion with the HERS rater, HVAC installer and above commentary I am eliminating the ERVs out of the design. I am going to re-run the Manual D for for a single HVAC (Trane...

Thanks - will discuss this duct arrangement with the installer. Also, many new and existing houses in NC beach area do install only the dehumidifier and not the ERV, per the code official I talked...

Thanks, I guess that leaves an interesting trade-off, balance the increased duct complexities, cost and potential control issues using either a single zone or perhaps two zones across two floors...

Yes, you are correct, I should have looked more closely at the Trane web site. However, for the 2 ton unit I know the 1st stage kicks in at 1.5 ton, but for the 3-ton unit does the 1st stage come in...

Thanks, I can certainly send all the drawings and manual J reports if you would like me too. The firm doing the Manual J, S and D is doing exactly as we requested and they noted it may take a 2 or 3...

Looking to optimize the HVAC design of a house in NC near beach on pilings. House is 2580' tight insulation design, inverted floor plan with all closed-cell foam (attic, walls, below 1st floor, etc.)...

Thanks, that's what I thought. Yes the vision pro looks like it's what I will need. Is there any material difference from a cost or performance perspective between the 15xli and the Trane's other 15...

Interesting comments on the SHR of the Trane 16Xli. Now I am concerned that I may have base-lined the wrong units for the house on the beach in NC in process of being built. Initial selection is 1.5...