Ok, I have had it set at 78' with 40% and 45% RH. This is what I have seen:

1. IAQ set at 45% stays at 50%
2. IAQ set at 40% stays at 41%
3. No steam on bathroom mirror when taking hot shower and AC running
4. I can shave in the shower and see my face clearly in the portable mirror. That has never happened before.
5. Air quality and comfort have been great

The owner came out a couple of days ago to paint the mastic. It looks a lot better, so much better that I plan on painting the return and supply in the laundry room. The laundry is still a work in progress, but it looks so much better compared to before. Here are some Pics: