ulc2020

Focused on COVID-19 for now. Will disappear from Twitter after.

[ulc2020 @ulc2020]

@be_folks @RidgeOcean @jillneimark @NukitToBeSure @eddericu @Engineer_Wong You can enter this link on Superbuy to locate it (there are options for the 6 fan model, 4 fan model, etc.):
https://t.co/zkmrQELC0X

[ulc2020 @ulc2020]

@VentiloAngel I have a handful of this model, in its Taotronics and Lowell branding. While I have a number of the original filters, @cleanairstars did testing on using a Starkvind filter in these models. https://t.co/GqIkJqvuxz

[ulc2020 @ulc2020]

Ford's emergency PAPR re-purposed seat blower fans from F-150s and was much quieter externally. (It still was not that quiet for the user wearing a hood, however, IIRC. I looked into modifying it with a half-respirator like a North 7700 so that the noise coming through the hose was isolated from the user.) I had hoped that the use of high volume off-the-shelf parts (Dewalt batteries, etc.) might lead to progress -- something that folks could maintain and use for a long period, but obviously that did not happen.

[ulc2020 @ulc2020]

@NukitToBeSure @ThisHouseFresh I could not find anyone who ever tested it this way, but I would assume the Blast would also serve well as a large laminar air purifier, with more "reach" than the smaller ones typically marketed for that purpose.

[ulc2020 @ulc2020]

@NorthBoxSystems I have considered the same (see older thread below).
I concluded that the configuration likely would not help much with PC fans (given their size/power), but the configuration would be helpful with a larger/stronger fan (reducing footprint). https://t.co/Ae16kxr52X

[ulc2020 @ulc2020]

@Stoffel78179983 @JimRosenthal4 The Mann + Hummel filter cubes show the basic idea, except there half of the cube is taken up by the fan, and they use 6 shallower V's (12 filters) to minimize the volume of the cube and still maximize the surface area.
https://t.co/XQiMYVLXgF

[ulc2020 @ulc2020]

@Engineer_Wong Are you planning to use the same fan or sets of fans in each?

[ulc2020 @ulc2020]

@mong_twi @Engineer_Wong @Noctua_at How difficult is the replacement? (E.g., does it require soldering, etc.?)

[ulc2020 @ulc2020]

Do you think this person even bothered to license the stock photo they are using to create a fake persona to attack @NukitToBeSure? I bet the answer is no.

[ulc2020 @ulc2020]

@NukitToBeSure @julieBeeBrown Can you clarify using the room volume versus the floor area? E.g., a room with 107 square feet of floorspace would generally have more than 353 cubic feet of volume. I may be misunderstanding the instructions. Thanks!

[ulc2020 @ulc2020]

@Mx_Reese There is a spreadsheet available for download directly on the product site labeled "Nukit Torch Spectral Data & Safety Assessment - Ewan Eadie".

[ulc2020 @ulc2020]

@CleanAirStars @ghhughes For anyone looking to explore a DIY option, the P14 Max or some other higher pressure fan is likely important. This model uses 3000RPM fans (although the best laminar results are at a little less than 50% power).

[ulc2020 @ulc2020]

@CleanAirStars @ghhughes In my testing, the H12 filters for this model offered much better numbers (fit factor equivalent) than the H11 filters. The device isn't light; this seller offers 4 fan (and 9 fan and 2 fan) models. The 4 fan might be better for mobile use (with a trade-off in coverage).

[ulc2020 @ulc2020]

@CriticalAerosol Far-UVC devices?

[Nukit @NukitToBeSure]

@Kenneth33071904 @ScottFarbman @citrusdriad Almost every Far-UVC device on the market is tested for ozone emissions and passes. But also- yes:
https://t.co/y4QvAVEePE

[ulc2020 @ulc2020]

@NukitToBeSure @DisabledDoctor Here are the pictures. It's breath-taking that the Peng paper describes this as just "an office" or "real-world setting":

[ulc2020 @ulc2020]

@CleanAirStars @akittycommittee @SaferErasTour The Lorell version (Lorell 420) of the Taotronics TT-AP003 purifier is on sale/clearance at a few places (OfficeCrave [.com]; WholeSaleCleaningSupplies [.com]) - around ~$78 w/ shipping. Cheap filters. Set it on level 2; quiet/easy/inexpensive.

[ulc2020 @ulc2020]

@AltenbergLee @TheFandelier It was less common than single filter DIY Fan, but there were 4 filter box fan configurations, 3 filter box fan configurations, etc. Here is another one from 2016 (3 filters in a box configuration; cardboard on top; filters came in 6 packs):

[ulc2020 @ulc2020]

@TheFandelier @AltenbergLee Here is the description/explanation:

[ulc2020 @ulc2020]

@TheFandelier @AltenbergLee Good find. I haven't seen that one before (and it was scraped by the Internet Archive as well). Here's one I found from February 9, 2014:
https://t.co/559kGHOYwW