Indoor air filtration could lead to increased airborne endotoxin levels (2020)
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Re: Indoor air filtration could lead to increased airborne endotoxin levels (2020)
#2Would someone who understands this better mind explaining? For example, should we be stop using air purifiers.
Re: Indoor air filtration could lead to increased airborne endotoxin levels (2020)
#3Would someone who understands this better mind explaining? For example, should we be stop using air purifiers.
It sounds like they're saying that you need to replace your filters periodically.
Re: Indoor air filtration could lead to increased airborne endotoxin levels (2020)
#4Would someone who understands this better mind explaining? For example, should we be stop using air purifiers.
It’s a pick your poison conclusion.
Re: Indoor air filtration could lead to increased airborne endotoxin levels (2020)
#5Would someone who understands this better mind explaining? For example, should we be stop using air purifiers.
No post body was provided.
Re: Indoor air filtration could lead to increased airborne endotoxin levels (2020)
#6Would someone who understands this better mind explaining? For example, should we be stop using air purifiers.
Quoted post unavailable.
More nuance could be:
Forcing air through micro particles suspended in a filter creates other kinds of micro particles rarely foujd in air, and with unknown effects on health.
Re: Indoor air filtration could lead to increased airborne endotoxin levels (2020)
#7The contrast indicates that regularly replacing the HEPA filters of APs could represent an effective method of avoiding increased endotoxins in the filtered air.
That's a pretty clickbaity paper title. The lede was buried. A better title would have been: Regularly replacing HEPA filters may reduce endotoxins in filtered air
I'm a high school drop out so what do I know.
Re: Indoor air filtration could lead to increased airborne endotoxin levels (2020)
#8Would someone who understands this better mind explaining? For example, should we be stop using air purifiers.
For particulates, media filters actually get more efficient as they get dirtier. They also get harder to blow air through, which means less air volume with normal fans or higher energy consumption with VFD fans. I'm simplifying a bit, but traditionally change intervals are based solely on keeping air resistance within acceptable values.
This paper presents a different mechanism by which IAQ can be negatively impacted by a dirty media filter. It's possible that this affects change intervals or other measures, and it's possible that this is a matter of theoretical concern but in practice doesn't matter much. It's cliche to say that a study's conclusion is that there should be more studies, but that's really the case here.
Re: Indoor air filtration could lead to increased airborne endotoxin levels (2020)
#9Roughly speaking, 2× the levels compared to purifier off, if I understand the paper correctly.
Considering that running a purifier lowers my yearly average PM2.5 exposure by approximately 60-80×, I think I'll continue running the purifier. Interesting data nonetheless.
Re: Indoor air filtration could lead to increased airborne endotoxin levels (2020)
#10Can someone with access to the article comment on the researchers' findings for how long new HEPA filters typically last, before they start emitting nontrivial quantities of endotoxins?