Case fan duct for grow tents (parametric)
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Allows mounting a case fan to a grow tent to use as an exhaust. Parametric (openscad), filter part optional.
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Axial fans are loud and power hungry (15W for 100m^3/hr vs 1W with a noctua fan), recommended filters are expensive. This is an (optionally) two part build to mount exhaust/inlet fans to your grow tent, and to put a sheet of carbon filter to filter out any potential smells.
Is such a basic filter useful, will it block strong smells for a plant's lifetime? Am I being a fool? Only time will show. To begin with however, it helps with blocking entirety of light smells on day 1.
There are three sets of files:
- Set 1: Complete set, designed to mount the filter after the fan (outside the tent). Can be printed in two parts then superglued together.
- Set 2: Complete set, designed to mount the filter before the fan (inside the tent). Two part print.
- Set 3: A set to modify a two-part print of set 1 to function as set 2, in case you decide that you want to mount the filter inside the tent instead. Made this so I can avoid wasting time and filament to convert my original print.
The example values and stls are for a 120mm fan, specifically a Noctua NF-A12x25 5V PWM. This should in theory be able to be changed for any fan by adjusting the values. Example has 10cm of depth without holes for the tent's own duct, and 10cm with holes to fit a filter.
There's some hole overlapping and this is normal, I'm lazy with the math. In the cover picture there's a failed layer, this is because an earlier version had some floating parts. This shouldn't happen with the version I posted here.