https://github.com/hzeller/air-filter-box
Quad AirFilter using standard box-fan and standard aircon/furnace filters
https://github.com/hzeller/air-filter-box
fan filter quad-filter
Last synced: 8 months ago
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Quad AirFilter using standard box-fan and standard aircon/furnace filters
- Host: GitHub
- URL: https://github.com/hzeller/air-filter-box
- Owner: hzeller
- Created: 2021-06-15T12:33:06.000Z (over 4 years ago)
- Default Branch: main
- Last Pushed: 2021-07-03T16:45:25.000Z (over 4 years ago)
- Last Synced: 2024-12-29T09:43:25.638Z (10 months ago)
- Topics: fan, filter, quad-filter
- Language: OpenSCAD
- Homepage:
- Size: 11.6 MB
- Stars: 2
- Watchers: 2
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
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README
# Air filter box
Getting ready for the next wildfire season.
This is using [MERV13 filters from Amazon](https://amazon.com/dp/B00CJZ7TB2)
as well as the guts from
[some well-made fans](https://amazon.com/dp/B08GLV99T9).
### Generate file
The cut is dependent on the thickness of the used plywood. To generate DXF
file, [OpenSCAD] needs to be installed. Then, measure the
actual thickness of the plywood with calipers.
Let's assume we measure **5.7mm**. Then this command will generate the necessary
DXF file:
```
make air-filter-cuts-5.7mm.dxf
```
As an example, there is a 5.5mm size pre-generated [air-filter-cuts-5.5mm.dxf](./air-filter-cuts-5.5mm.dxf) in this directory.
### Laser cut
Everything is in one big DXF file of which probably parts have to be disabled
to cut one at a time on a normal-sized laser cutter :)
To laser-cut, it is probably good to use an inward kerf correction for the
finger slots.
### Assembly
Glue in top and bottom filter stopper (shown in blue below first).
Corner parts have to be slotted together length-wise, then the bottom and
top finger joints fit exactly with the corresponding top and bottom plate.
Corner parts can be glued.
If things look like this, PM2.5 is probably high, and it is good to have
such filter:
[OpenScad]: https://openscad.org/downloads.html