This is a good idea. Ive often looked at our outer door. It freely swings so fan opens it & the inner door when fan is on. Dont know how many times though outer door was locked closed. Trying to reach up there to free it. Or worse getting up in the middle of night trying to lock it, if its really windy itll start banging. Often though Ill put a twig holding the outer door open. Seams the oven will draft if door is manually held open, heat will open the inner door
But I alwasy get stuck on the inner door. I see you removed it, but Id also like to keep inner door for isolation. Possibly sloting inner door for rod. I remember my dads camper the vent door was manually controlled, door was spring loaded to open, had pull chain to close, seems like a better design.
I never could really figure out why there is/was an inner flap.... still I wonder why...what purpose could it serve? Well here is your chance to design and make a million in the RV business. Design and make high end hoods that open and close on demand to the outside.....Did I just give that away?
YUP-you just gave it way, its common knowledge now, might still sell a few but no patent. Another million out the window...
Ours the inner door has a gasket. It what seals from the outside air. Well as much as a thin sheet of aluminum can. The outer door just a floating plastic flap.
Hmmm, now that you mention if the outer door was manually controlled, not relying on fan to push open gravity to close, a person could gasket it, even insulate. The inner door wouldnt be needed..hmmm
Which would make our muffin fan more effective-not using its energy to hold doors open.
the KellerKlosure..Im taking another look