Condensation drops on HVAC vents

[Donald]

Daughter in NC has drops of water on the metal HVAC vents. I assume vent metal is cold and water condensing. RH inside is 55%.

I am thinking the only solution is to add a dehumidifier to the HVAC and dehumidify more than just when the AC is actually running.

Will the vent metal or screws rust over time?

 

[hemitom]

Yes they will rust over time .
dehumidifier will definitely help.
in a hot humid climate I would insulate all duct work if possible.
Ideal humidity is 30 to 50 percent I suspect at certain point of the house the humidity is higher than 55%

 

[Mechanician]

Recirc setting should help. Make sure the door is working.

 

[Nukeman7]

Recirc setting should help. Make sure the door is working.

I believe the OP is referring to the HVAC system in the home, not a vehicle.