Fan Blast Door for Heated Build Chamber

Since I want a heated build chamber, emphasis on heated, I don't want to be evacuating all of the hot air throughout the print so I designed the blast door so that I can keep it down (~sealed) while the print was ongoing and then flip it up after the print is done to vent the chamber. I ordered a fan controller so I can flip on some fans after I open up the blast door. The fan controller and the fans were meant for desktop computers, but it's perfect for my weirdo application. Eventually I'll