Damon Binder recently
wrote
up an argument for prioritizing air filtration over
far-UVC for pathogen control:
UVC and filtration are close substitutes—both deliver effective air
changes per hour, both reduce airborne pathogen concentrations by the
same amount per eACH—and on current pricing, filtration is cheaper.
There's a lot of good stuff in his analysis, but I see [1] three
considerations that really change the bottom line:
Cost is actually much lower. Noise is a serious issue. Performance is dramatically higher in larger rooms.Cost is straightforward. Binder priced far-UVC based on the
high-quality Care222 lamp with the Krypton-11 at $2,500, but
there's a much cheaper option, the Aerolamp at $500.
It's also moderately higher output.
Binder analyzes a 30m2 room with a 2.5m ceiling. I'll assume this
means 6x5x2.5. If I configure Illuminate with an Aerolamp
in one corner pointed 0.5m above the far corner the installation is
within TLVs and I get a median effective number of hourly air changes
(eACH) of 11.6. The lamp degrades approximately
linearly over Binder's 11,000 hour evaluation period down to 70%
capacity, so we're averaging an eACH of [...]
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https://www.lesswrong.com/posts/wkeXF6xEL7bLnwpWG/contra-binder-on-far-uvc-and-filtration
Narrated by TYPE III AUDIO.
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