The window and 90 degree adapters are inspired by 100mm Vent PVC Window Attachment and the P1S 90 Degree Exhaust For 100mm Ducting by Jono, I have redesigned this work for a specific use case listed below.

This extends the hose pack with the Creality Laser Engraver Enclosure 2.0 - Compatible with 75mm/3" hoses.

This design uses the original holes to connect the 90 degree adapter to the enclosure. Then the 120mm mains fan and the second adaptor joins the fan to both the first adapter and the supplied hose in the enclosure kit. The final three window adapters take the 75mm/3" hose supplied by connecting it through a double glazed window, which can be locked in the open position.

Use the small fan included in the enclosure to push air in from the opposite side to the side you connect this kit.

Note: You will need to add a 120mm mains fan.

Designed for PLA use, I have set them to 3 walls, 15% infill and tree supports.