Real-world data show that filters clean Covid-causing virus from air

Post by selimthegrim » Sat, Oct 09, 2021, 7:19 PM UTC

dragontamer wrote: post #22

weaksauce wrote: post #16

Earlier quoted context omitted.

I mean you are dropping the whole colds are coronaviruses too part though. though, the "cold" has a bunch of possible viruses that cause it (something like 200 different viruses) with the rhinovirus being one of the larger ways since it's so resistant to being inactivated comparatively to sars2 which only lasts for a day to three as a fomite vector, is neutralized by soap and water or 70% IPA. If covid had a viral ve…

> I mean you are dropping the whole colds are coronaviruses too part though. There's only 4 coronaviruses that causes a cold: HCoV-OC43, HCoV-HKU1, HCoV-229E, and HCoV-NL63 The rest are rhinoviruses. ------- That's literally only 7 coronaviruses to care about (including the 4 that cause "common cold").

Post by jbay808 » Sat, Oct 09, 2021, 7:19 PM UTC

overton wrote: post #36

dmix wrote: post #28

> “This study suggests that HEPA air cleaners, which remain little-used in Canadian hospitals, What, they are "little used"? I'd assume that's the first place that would have adopted them. So strange how some hospitals operate.

Early on in the pandemic, the Canadian IPAC (Infection Control and Prevention) establishment came down hard against theories of airborne COVID transmission, at first even going so far as to not recommend masking. Even now that the science of airborne transmission has been established, they're waging a rearguard battle to obfuscate/deny it and airborne protections such as better ventilation and masking. If you go to a…

Post by throwaway984393 » Sat, Oct 09, 2021, 7:31 PM UTC

dragontamer wrote: post #19

throwaway984393 wrote: post #15

You can build your own high-flow HEPA filter for about $45: 1x 20-inch box fan ($20) 1x 20x20 MERV-13+ MPR-2400+ HVAC air filter ($20) 1x roll of duct tape ($2.50) Air particle meters and other testing show they work just as well as big expensive machines (it's just the filter doing all the work). This is indeed a dirt cheap way to improve overall health.

> 1x 20x20 MERV-13+ MPR-2400+ HVAC air filter ($20) That's a MERV-13 filter, not a HEPA filter. HEPA filters 99%+ of small (0.3um) particles per pass. A MERV-13 filter only filters like 60% per pass IIRC. That means that a 1000 cu. feet of air through the HEPA filter will result in 990+ cu. feet of clean air. While the MERV-13 filter will only produce 600 cu. feet of clean air. -------- A MERV13 filter would be good…

Post by ComputerGuru » Sat, Oct 09, 2021, 7:39 PM UTC

kadoban wrote: post #47

Wowfunhappy wrote: post #35

Earlier quoted context omitted.

I'm student teaching in a third grade classroom, and I want to add a least a small counter: We are required to have two HEPA filters always running in the classroom. They are loud. Combined with the fact that (1) children mumble, (2) the children have masks on, and (3) everyone is supposed to stay 3+ feet apart, it's quite hard to hear what a lot of kids are saying! I don't know what the right answer is, but what we…

There's quiet filters. I can barely hear the one(s) in my house, and they're just cheapo ones. Typically the key is to keep the fan speed reasonable, if you crank it up all the way almost any fan is going to be loud.

Post by tootie » Sat, Oct 09, 2021, 7:42 PM UTC

pkulak wrote: post #46

throwaway984393 wrote: post #15

You can build your own high-flow HEPA filter for about $45: 1x 20-inch box fan ($20) 1x 20x20 MERV-13+ MPR-2400+ HVAC air filter ($20) 1x roll of duct tape ($2.50) Air particle meters and other testing show they work just as well as big expensive machines (it's just the filter doing all the work). This is indeed a dirt cheap way to improve overall health.

I see people post this all the time, but I really don't think an axial fan can pull air through a HEPA-like filter. You need to spend $150 on a real solution. It's really not much, includes the filters, and looks a hell of a lot better to boot.