4 ms·
> I wanted a new design that preserves the best aspects of using a box-fan: ... No proprietary parts. Does HEPA filter qualifies as a proprietary part? Can it
by avmich 6y ago
> I wanted a new design that preserves the best aspects of using a box-fan: ... No proprietary parts.
Does HEPA filter qualifies as a proprietary part? Can it be created at home?
- klyrs 6y agoIt's a commodity part that you can pick up at many hardware stores, and if the filters you get are different size from the article, it's easy to modify the design to match. Contrast to, say, a Dyson air purifier: you need to buy Dyson-brand filters (or a knock-off).