Absolutely shameless plug: If you'd like a cleaner looking, 3d printed solution for attaching a filter to a pretty standard box fan, in this fashion, we sell some over on Etsy (use the coupon code HACKERNEWS, 20% off) [1]
Does it work better than duct tape? Probably not. Duct tape does a great job of creating an airtight seal, whereas with these clamps there is a small gap between the fan and the filter. But, it does make it easier to replace the filter, looks clean, and we've ran tests with an AQI meter; definitely has a positive impact.
Does it work better than duct tape? Probably not. Duct tape does a great job of creating an airtight seal, whereas with these clamps there is a small gap between the fan and the filter. But, it does make it easier to replace the filter, looks clean, and we've ran tests with an AQI meter; definitely has a positive impact.
[1] https://www.etsy.com/listing/980605509/box-fan-filter-holder...