re: Troubleshooting bedroom humidity levels (continued from previous thread)

You’ve gotten good advice and recommendations from notsince98 and others in this thread. I would have a blower test (energy audit) conducted to check and identify leakage.

You may have to reduce the air handler/furnace blower speed to get better dehumidification particularly if you have a furnace as furnaces are usually set at the factory to the highest speed which is near 400 CFM per ton. You probably need to set air flow at 350 CFM per ton, or 1400 CFM, in light of the fact you upsized the unit.

And you are measuring relative humidity within the room (mixed air) and not the humidity of cooled air exiting the floor vent - correct?