To install:

Open the zipper about 12 inches
Hold The Ventilator on the end
Lower it down into the open zipper
Wedge the opposite end into the zipper opening
Change your grip to the top of unit
Close the zipper up to the end of The Ventilator
Hold one end of the bag and slide the close zipper against the end to further snug it up.
Plug it in, DONE