A duct to adapt a 200mm hose to the fresh air side.

So you can use the eurom Polar 9001 in dual hose mode.

I printed it in 4 parts and clued it together, as it was too big for my printer.

You need to replace 6 of the originals screws with slightly longer ones.

Don't use too long screws, the radiator is directly behind the rear wall.