Like I said before, It's a brand new house and the ducts I can see seem to be sealed pretty well, so I don't think there's too much leakage, but I haven't had the system tested, so I don't know for sure.Excess duct leakage has potiential for raising the moisture level.
Maybe that's the problem... it's summer in florida, but I don't think I ever have a really have a high cooling load. I live in a townhouse in a middle unit, so two of my walls 'exterior walls' are connected to other units (that are hopefully air conditioned). I have an east and a west wall, but I keep the blinds closed when the sun is coming in. The attic is reasonably well insulated. As I said above, I suspect that the units may just be oversized.Your heat pump should be able to maintain ,50%RH during high cooling load conditions. During cool damp weathe with low/no cooling loads and adequate fresh air, you will need supplemental dehumidification. Regards TB
I guess I should ask the tech about installing a dehumidifier too.