Creality K1 HEPA Filter Housing Remix

My vision of a great idea of PAPIGLO 3D printing services

Differences

1. The case is moved a little bit to the right away from the motor wires.
2. Added more space inside  to allow the fan to take air from the whole filter area.
3. The case moved higher (Type1 file) so it would take more air from the top of the printer where a lot of warm air accumulates. 
4. The case and the seal are designed so that you can run the fan cable through the wall. But in this case you will have to drill the printer wall or cut out the plastic grill.
5. Added a new part: Fan Gasket. Its main purpose is to cover the gaps that were created between the fan and the back wall due to my careless cutting of the grille. Printing is optional.

Installation

Watch carefully to make sure the feeder wires do not snag on the filter housing. If this happens, it is better to print a model with the duct in the middle (Type2 file). Personally, I've never had a cable snag.

I cut out the plastic grille completely, as the fan behind it was getting rather noisy. This operation provided several advantages:

1. The noise level from the fan was reduced.
2. Airflow was increased.
3. Now the fan cable does not change its position in the printer.

It is not necessary to cut the grille or drill the wall - the cable can be routed as advised by the author of the original model.

Duct seal orientation:

HEPA Case Print Settings:

• Material: I used PETG.
• Layer height: 0.2
• Walls: 3
• Top/Bottom layers: 4
• Infill: 20%
• Brim type: Outer
• Supports: Yes. Only disable them at the top of the model above the diagonal beams by painting restricted area.
• Preferred orientation in the image below.
  
  

Seal Print Settings:

• Material: TPU
• Vase Mode
• Line width: 0.6
• Layer height: 0.2
• Preferred orientation in the image below.
  
  

Fan Gasket Print Settings (optional model):

• Material: TPU
• Layer height: 0.2
• Infill: 100% or use walls as much as possible