metre readings and Dr. Wood Dust
I could imagine those air vents at commercial sites must be a new form of unholy hell. I shudder to think.
..
On trying to get to a practical outcome, I thought to read a bit about what Bill Pentz and Matt Wandel say about such things. I found this article to be illuminating in many ways https://woodgears.ca/dust/dylos.html
Especially about the needle felt filters and the use of various low-tech solutions (I remember BobL saying, a long time ago in a post on dust collectors and PF's, how efficient they really are, despite their apparent nastiness).
Worth the time to read it, including the final thoughts and conclusions at the bottom....
I really need to buy one of those 2.5ppm particle detectors. https://www.ebay.com.au/itm/Household-PM2-5-Detector-Module-Air-Quality-Dust-Sensor-Tester-LCD-Display-2-8/192876810276
MERV13 and the JET AFS2000 room air filter
A question of a curious mind!
If one were to run TWO filters, would the result be "better".
I understand it will create a bigger pressure drop, but I've an opportunity to buy multiple for a low price.
I've the Jet AFS2000. It uses a pre-filter of 20x24x2 at around MERV8. The primary internal bag filter is also 20x24 but is an 8-pocket type. Its MERV rating is utterly unpublished. Jet itself is absolutely appalling in their weasel-word non-explanation and should be the target of a lawsuit. Its evasive language and deliberate non-specificity leads me to think that it is no better than ABSOLUTE JUNK.... https://www.jettools.com/us/en/p/afs...control/708615
The replacements are equally deliberately vague https://www.amazon.com/Jet-708723-AF.../dp/B0009H5RJI and even going to Actifil (Allwin), the makers of these filters, has ZERO information on them. Interesting considering every other product they sell has copious labelling as to efficiency.
I wrote to JET to enquire.... silence.
As I said. Untrustworthy junk.
Now, I can acquire decent filters from a few places!
AirePleat M13 HC Merv 13 508x610x100mm https://shop.airepure.com.au/1304202...0x100mm/pd.php @ $95
FilterBuy USA - 20x24x4 https://filterbuy.com/air-filters/20x24x4/ .... Six for USD$119 and AUD$97 shipping (ShopAndShip.com)
Bison CPF20244.13 https://www.bisonfilters.com.au/p-28...ant-media.aspx AUD$68 delivered.
The US option is cheapest, but one needs to buy 6. I can acquire 4 at the same price, but the postage remains almost the same.... so may as well get 6!
If I were to put TWO of these in the JET, would I be better off filtration wise?
OR would I be better off using just one and leaving it on for longer?