If you're like me, you've experimented with commercial air cleaners. They are often small and use proprietary filters. They work ok. Well, I'm remodeling, and so in addition to the usual ways to keep dust down, such as taping plastic over openings, using a respirator, a vac with a hepa filter and bag.....I made a multi-room air cleaner.

Introducing the De Smidt Dedustinator 15. Why 15? Because it uses a Wynn Environmental Merv 15 filter designed for woodshop dust collectors. A Catepillar enclosed motor fan is attached to the to filter via clamps, and there's a super thick gasket between the fan and the filter.

It takes about 5 minutes to mount the fan on the filter. It's big. It's stable. At the lower settings it's quiet. At the higher settings, it moves a ton of air. It could be useful overkill in a film loading room, regular darkroom, or scanning room. Total cost was about $400.