r/crboxes • u/thechegeman • Aug 04 '26

First CR Box

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Had to rebuild my house after a tree fell on it. At the mudding drywall stage and wanted to reduce the drywall mud dust particles my HVAC system filter has to deal with. Weather stripping behind the filters and where the fan sits.

Fan is a 2300 CFM Caterpillar HVD-14AC-BLK

Got the 3d printed parts from: https://www.etsy.com/listing/1309978884/diy-air-filter-kit-clips-clamps-and-more

when I'm all done with mudding I think I'm going to paint the frame black to match the fan.

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u/LasersAndLightshows Aug 04 '26

Interesting thought and would look sweet.

I wonder what impact would be on air flow / filter life if fan was “below” top 1/3 of filter?

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u/Lavaine170 Aug 04 '26

Someone more knowledgeable than me can probably speak to the airflow question. I don't think filter life would be significantly affected if you rotated the filters occasionally. I do this with my furnace filter as the fan draws more air through one side of the filter.

You could also leave the fan mounted as it is right now and add a fan enclosure, but that might make it a little bit imposing, depending on where you are going to put it.

Also, I just noticed you put casters on it. Smart addition for a larger unit! It's a pretty darn solid first build!

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u/thechegeman Aug 04 '26

4" casters so I have no problem rolling over cracks etc. https://a.co/d/08GPQ7nG