I've been working hard to find a professional to assist you with your question, but sometimes finding the right professional can take a little longer than expected.
I wonder whether you're ok with continuing to wait for an answer. If you are, please let me know and I will continue my search. If not, feel free to let me know and I will cancel this question for you.
I'm afraid ac is my only option. This is where I live. Heat index of 172F!
Getting the humidity too low is not a problem.
I think I need an HVAC technician or mechanical engineer to answer my original question as posted. Thanks.