I had a talk with an HVAC man today. I told him how running my heat pump at 77-78℉ is a problem this summer and has been hard to keep the RH in the comfort zone at this temp. He recommended just what I thought has been helping lately, is running it at a lower temp. I turned it down from 76 to 73℉ and the RH is now well into the zone now, at under 50% for once. It feels like I'm in a refrigerator but I guess I'll get used to it. I bought a dehumidifier that I should have in a few days. But I don't know, running the heat pump at a lower temp might be more cost effective that running it higher and having the dehumidifier kick in once in a while. Thoughts? I always functioned better in dry air, not humid air. I'm in East Tennessee but lived in New Hampshire for over 50 years. I can't afford to move to a drier climate but I can get rid of the humid air in my house.