LN, I wouldn't have said anything if the battle for the correct temps in my op hadn't made so much difference.

Lucky you with aircon!

I use a dehumidifier to control RH when the temps are too low to trigger the exhaust thermostat (i.e. wintertime, lights off). The dehumidifier makes a bit of heat which brings temps up a little. When the room temp exceeds the thermostat setpoint, whether from lighting heat or from the dehumidifier, the blowers kick on.

You can get humidistats which you can parallel with a thermostat to control the exhaust fan, but if the ambient temp is low and the humidistat kicks the blowers on, it would cool the room below the usually acceptable ranges. I find the dehumidifier helps keep both temp and RH in range.