Turn off the 15 amp 120v circuit breaker labeled fan then the 15 amp 12v fuse labeled fan (the second one surprised me). I also disconnected the wire from the 120 breaker so if someone accidentally turned it on, it doesn’t go anywhere. I taped the Wago connectors and the tucked the 120v wire out of the way.
I drilled four holes in the corners of the cut out, went up and cut and peeled back the roofing material then sawed the pressboard out as well as the wood block that held the fan make up box.
Test fit, drilled pilot holes, generously apply Dicor, separate out the eight screws that don’t work and screw it down. Fit the housing making sure you don’t crimp the new wires.
Wire the fan to the existing red and red black strip wires, replace the 12v fuse turn on the switch that says ceiling fan and test.
The trim ring didn’t even need to be cut, it just fit.
This is took a little over three hours to complete.
Our bedroom has the ac unit also though when we are done installing our solar the fan will work better.