Velux GPU MK04 window exhaust adapter

New better version available here (only for the P2S, X2D and H2, not for AC units): 

https://makerworld.com/en/models/3013732-velux-gpu-mk04-window-exhaust-adapter-x2d-p2s-h2#profileId-3385132

 

New better version for AC units available soon

 

I needed a adapter for my X2D so I can exhaust the fumes out the window.

• This exhaust adapter is designed for the Velux GPU MK04 for a 120, 130, 140 or 150 mm hose.
• The height of the opening can is 25mm. I have added a quick print fitting mold if you want to check first if it will fit.
• It works simply with a perfect fit in the grooves and closing the window. 
• I suggest adding some felt pads like shown in the picture for a even better fit.

Other diameters and widths can be made on request. It might fit similar Velux roof windows as well, I have not tested that.

If you connect a airconditioning unit with a large hose (140mm or larger) you need a large opening for undisrupted airflow, otherwise the AC unit can overheat. A better version for AC units is available soon.

 

Other Velux window types with a confirmed fit:

• GPU SK06 (by Stetim87)

 

Change log 11-07-2026: 

• Removed the rib on top because it has a better fit on different windows without.
• Added small designer tag on the side because people are selling my design without permision.

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