Commercial HEPA flow hoods are expensive. I made a small HEPA filter from a catch basin (Lowes Item # 118877), a vacuum bag, wood, adhesive, and a squirrel cage blower.
I used the wood to mount the filter fabric.. The installed finished assembly works great. By that, I mean that the air flow is what I wanted: not too much or too little.
The social network of the future: No ads, no corporate surveillance, ethical design, and decentralization! Own your data with Mastodon!