Filter connection for indoor ventilation

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I want to open the windows and ventilate, but I don’t want to open much because the air in Tokyo is dirty.Pollen also comes in.
There is a highway near my house.
The filter of the ventilation hole attached to the room is too poor.

So I decided to remove it and put on a high performance filter.
High-performance filters are not sold in this form.
I bought another filter that I used when I made a self-made air purifier, and I modeled it with CAD by myself and made it with a 3D printer.

CAD drawing.

Outside of the circle, it was perfectly fitting. (Silver color parts are 3D printer self-made enclosures)
In order to reduce resin, we made the filter press parts smaller.
But it’s not cool, so I’m planning to remodel just here.

I can see the air coming out.
It is good because there is a track record for cars.
Because the price is around 300 yen, it can be exchanged without hesitation.
Personally, I am the most satisfied with the parts I made recently.

Filter

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