Well, I am letting air in now
drilled 1.5” hole to the right of the drain pipe
stand off tube going up into the void to keep water out ( working on a screen for it that can be removed from the inside to clean)
4” aluminum disc with flange, off center to clear A/c tubes … all components are glued with 3M window polyurethane glue in place
the disc with the off center flange is getting glued in the end of the fan …
(after I clean the mess…)
the fan assembly is 4 of those “fan drums” and this one only gets outside air… that’s the theory… Let’s see how it works…