Weird box on the roof of my 05 Thomas

[mmoore6856]

Originally Posted by BusWanderer83

Do you have a pic? Mine looked like a heat register but the ceiling panel was all one piece...just curious

Its for venting the moisture of of the insulation i believe. Ill be using a dehumidifier so i removed it and sealed the hole. I had a rain issue if it was parked wrong . The rain was getting inside and dripping on the dash

[RolesvilleMarina]

We used this location to mount our rooftop air con unit

[Lemorlove]

You need a place to get some fresh air and oxygen depleted in the cabin.

[Lwt52168@gmail.com]

I removed mine and installed a Max air fan