Heat Exchanger (40mm fan)

__Parts List__
* 2 x 40mm fans (12v preffered)
* 12v power supply
* 4-8 x 3mm diameter screws
* Cardboard + Duct tape
* Hot Glue

__Instructions__

1. Rotate the model 90 degrees and you won't need supports.
1. Once printed, you should be able to screw the fans onto each side.
1. Hot glue the fan to the heat exchanger for a better seal.
1. Partially open your window, cut the cardboard to plug the gap in your window.
1. Cut a 40mm high notch into the side of the cardboard and slid