If you’ve ever used air filters in your workshop to manage smells, fumes, and dust, you’re likely familiar with the costly disposable active coal filters. The need to discard used active coal might seem inevitable, but the waste of plastic and packaging from these filters can be mitigated through a more thoughtful design.
I designed a refillable replacement for the Philips FY3432 active coal filter. This alternative allows you to routinely replace the active coal while retaining the frame, reducing waste and saving money in the long run.
