Ceiling Vents Open during storage ????

Unfortunately I have to store my TT in a storage lot. That lot is dirt. I do have vent covers but my vents stay closed in storage or I will have dust every where in the TT. It is pretty dry here in CO but I usually use the passive dehumidifiers if needed.

So, depends on where your TT is stored, humidity levels, heat, etc. There is not one solution fits all for everyone.