Ventless Litter Box Fume Extractor

thingiverse

If you're fed up with smelling your beloved cat's litter box, this solution has got you covered! The ambient air and odors from the litter box will be drawn through a carbon filter followed by a HEPA filter before being exhausted out the back, leaving you with virtually no smell at all. As an added bonus of the filters, your litter box will be less dusty, which is better for everyone's health. My wife and I have been using this design on our own litter box with really great results. The filters seem to last for quite a while, but your mileage may vary. Your nose will tell you when it's time to replace the filters! This project relies on some very simple and easy-to-source parts for finishing. Besides the printed parts, you'll need: 4x M3 x 25mm screws 4x M3 x 30mm screws 8x M3 nuts 1x 120mm 12V computer fan (this doesn't need to be high-powered or noisy!) 1x 12V power supply 1x 130mm x 130mm carbon filter 1x "Eureka HF1, HF12, EL012 HEPA Filter, Part # H13, SP012, H12, 60286A, EL020 & EF26" style HEPA filter 1x hooded litter box The parts can be printed in any material using any resolution, so don't worry too much about what's "best." As mentioned in the parts list, you'll need a hooded litter box. We've been able to install this on several different styles, but the installation location may vary depending on the space available on the "hood." Once you have printed the main parts and gathered all of the extra parts, the assembly is rather straightforward. There are a few noteworthy bits to highlight however: 1- One of the parts to print is a stencil that will help you cut out the hole for the filter as well as drill the holes to keep the assembly together. 2- There's a hole on the side of the middle piece titled "rear filter housing exterior" that's designed to run your fan's power cables through. This just keeps things looking tidy. 3- The order of assembly can be seen in the photos, but I did omit the air deflector. The correct order of assembly is "filter cover interior," filters, litter box hood, "rear filter housing exterior," and "air deflector rear." This thing is currently in its infancy, and more revisions will follow. Some highlights to expect in the future are assembly with fewer screws and easier access to filters for when it's time to replace them.