5 ms·
Generally there are two classes of objects that you want to filter for. Particulates and VOC (Volatile Organic Compounds). Think of particulates as specs of d
by leon_sbt 8y ago
Generally there are two classes of objects that you want to filter for.
Particulates and VOC (Volatile Organic Compounds).
Think of particulates as specs of dust with varying size and VOC's as random chemical compounds such as spray paint, smoke, oders.
The general go-to clean room/industrial filter stack is Prefilter(F5 Bag)->HEPA->Activated Carbon. The pre-filter catches all the big particulates to prevents clogging the HEPA filter. The HEPA filter catches all of the really small particulates. The activated carbon captures most of the VOC's/oder/smoke.
The official way to monitor when a particulate filter is bad, is to measure the pressure drop across the filter, and compare to manufacture specs. For the carbon filters, you would install a gas sensor measuring whatever chemical your trying to scrub. When there is a spike in that particular gas compound from your sensor. You know the carbon filter is saturated, and should be changed.
It looks like the the filter mentioned in the article video,combines all the filter products into a single product. Nice! If your air handler can manage the increased pressure drops, please buy the most legit filters you can buy. It's literally the cheapest insurance you can buy.
- clairity 8y ago> “The general go-to clean room/industrial filter stack is Prefilter(F5 Bag)->HEPA->Activated Carbon.” yup, i bought a blueair 211+ (https://www.blueair.com/us/blue/blue-pure-211/1695.html https://www.blueair.com/us/blue/blue-pure-211/1695.html), that has exactly those filter elements in a nice (if bigger than expected) package. this model was recommended by both consumer reports and the wirecutter (until recently, cynically thinking they didn’t pay wirecutter’s “endorsement fees”). it’s effectively eliminated my constant coughing, sneezing and runny noses before i got it.
- eli 8y agoWirecutter doesn’t have endorsement fees
- gruez 8y agothey don't, although if they recommend you, they'll ask you for a cut of sales (affiliate program). if you say no, they'll switch their recommendation to your competitor and never review your brand again. https://news.ycombinator.com/item?id=16729408 https://news.ycombinator.com/item?id=16729408
- mrhappyunhappy 8y agoI called out the inherent affiliate bias issue years ago but HN cult tunnel vision didn’t want to hear it and downvote me to hell. Wirecutter is not to be trusted.
- gaadd33 8y agoWhen they link to a product on Amazon they then ask the brand to give them an additional cut of sales? I'm surprised Amazon allows sites to double dip like that.
- eli 8y agoThat is an allegation that they strenuously deny. https://thewirecutter.com/our-response-to-nextdesk/ https://thewirecutter.com/our-response-to-nextdesk/
- scurvy 8y agoI have a pair of Vornados with the same setup. They're life-changers (no exaggeration).
- MarkMc 8y agoI just bought the same model. What makes it so effective is that it has a filter on four large sides so it can process a large volume of air very quickly.
- chaostheory 8y agoDoes it spew out ozone? My memory may be off but I remember this model not meeting CA air purifier standards which was why Amazon couldn’t ship it to me
- clairity 8y agono, there is no ozone generator in this model (usually that's done using electrostatic plates).
- chaostheory 8y agoI'm still curious then as to why this specific unit doesn't meet California air purifier standards, which is why Amazon won't sell it to me.
- clairity 8y agoi'm not sure. i live in california and bought mine on amazon. wish i could be more helpful!
- dwd 8y agoThe purifiers I use have the activated charcoal before the HEPA. Probably doesn't matter that much though I sometimes findd a small amount of dust leakage from the pre-filter screen on the carbon filter which would just clog the HEPA.
- bradlys 8y agoMany don't have a prefilter and use the charcoal as the prefilter, essentially. I end up vacuuming mine or shaking it out (outside) every couple months to get rid of the build up.