noticed in the propane compartment there are 2 holes in bottom. also at top side is a 2" vent tube that goes about 28" to an outside vent at front of 5th. do I need a top vent with the 2 at bottom.
The vents not only allow any propane that should vent out the compartment but also allows air to circulate around the cylinders. As you use propane, the cylinders cool down from the propane boiling to replace the vapor that is being used. In high humidity conditions, the cylinder sweats. So ventilation is needed to help dry the cylinders out.