I find it silly that I'm spending money to keep my exterior walls, doors, and windows air conditioned.  Use this to send your comfortable air to the middle of the room where you need it and save on energy costs.

The hole in your floor will need to allow for the 250mm x 98mm.  If any other sizes are needed, feel free to comment and I'll try to make them also available.

With the lip, the coverage area is 280mm x 128mm.

The wide model adds 10mm to each lip for extra coverage of 300mm x 148mm.