When HN users recommended it
3 HN users recommended this between 2013 and 2017, in 3 comments.
20072026
Each tall tick is one HN user's first recommendation. A short tick is the same user again. Click a tick to jump to the comment.
3 HN users recommended this between 2013 and 2017, in 3 comments.
Each tall tick is one HN user's first recommendation. A short tick is the same user again. Click a tick to jump to the comment.
Below is the one I have and am very satisfied.
http://www.amazon.com/dp/B00007E7RY/
I'd like to rent one of those air quality testers for a week, anyone know where/if that's possible.
There's some cognitive dissonance going on here.
All that he's doing is buying HEPA filter media and strapping a fan to it. You _can_ spend $1000 on a fancy plastic enclosure with a fan and the same media, but you don't have to. This seems to be a product created for people who will pay a large amount for something simply because it is expensive. (perceived quality)
This [1] is what I have, it is $130 and rated to capture 99.97% of particles > 0.3 µm and is as far as I can tell as good as or better than the filters he is using/selling. Having searched extensively, I could not find a higher class HEPA filter which was not built for a laboratory environment.
>These $1k filters are designed for 2.5 ppm particles, not dust (10 ppm) and allergens.
The units you are using 'parts per million' don't make any sense in this context.
[1] http://www.amazon.com/Honeywell-50250-S-99-97%25-Round-Purif...
The big Honeywell cylinders w/ charcoal filters.
https://www.amazon.com/Honeywell-50250-S-True-HEPA-Purifier/...
At one point a couple of these handled 6 cats and 5 ferrets. The scammmy stuff made no dent. Commercial use hotel + mold ozonaters worked, but unsafe.