Most all Forest River trailers are ducted through the ceiling. If the vents line up to where you could install other ones, then it's simply a matter of buying a matching vent from your RV dealer, and cutting a hole to install it. Ours has no vent, either, but it does have the Fantastic fan power roof vent in the bath that works as it says...FANTASTIC!!
/SIGPIC]'08 V-lite Flagstaff 30WRLS
'06 Ram 1500 QC hemi
Reese dual cam sway control,
K&N series 77 intake, Hellwig helper spgs. LT tires,
Flowmaster "true duals", 380 h.p., Bilstein shocks