Gary Turner
@dtaguy.bsky.social
Physicist, DIY Air Purifiers/CR boxes, air quality, COVID, biochemistry. I follow some accounts I strongly disagree with. I recommend that practice.
Good. Thanks. I sometimes go to technical seminars in classrooms at a local college and never see masks, purifiers, or UVC. When I asked about CADR in one of their auditoriums, I got the usual "We meet all requirements..." Which tells me they didn't know the CADR and didn't care.
October 16, 2025 at 10:35 PM
Good. Thanks. I sometimes go to technical seminars in classrooms at a local college and never see masks, purifiers, or UVC. When I asked about CADR in one of their auditoriums, I got the usual "We meet all requirements..." Which tells me they didn't know the CADR and didn't care.
I didn't see any masks. How is the air quality in a room like that?
October 16, 2025 at 10:11 PM
I didn't see any masks. How is the air quality in a room like that?
Agreed. But I'll still push for "high CADR", or perhaps "high-CADR/HEPA" since I expect that if air purifiers do become widely adopted, they won't be HEPA, and using only the HEPA term may delay that day.
September 24, 2025 at 5:29 PM
Agreed. But I'll still push for "high CADR", or perhaps "high-CADR/HEPA" since I expect that if air purifiers do become widely adopted, they won't be HEPA, and using only the HEPA term may delay that day.
I am glad to see you were not intentionally blocked. I agree with your statement, except I think a better term than HEPA is "high CADR", since CADR is a metric while HEPA is only a standard for single-pass efficiency.
September 24, 2025 at 4:03 PM
I am glad to see you were not intentionally blocked. I agree with your statement, except I think a better term than HEPA is "high CADR", since CADR is a metric while HEPA is only a standard for single-pass efficiency.
Yes. Accent on ADDITIVE air cleaners.
September 5, 2025 at 2:36 PM
Yes. Accent on ADDITIVE air cleaners.
Cooler because it's paint, not because it's black, right?
August 23, 2025 at 3:46 PM
Cooler because it's paint, not because it's black, right?
And less effect with high-wing than low-wing. Would depend a lot on on runway length and width. But right next to the conveyer it's a 60mph headwind.
August 17, 2025 at 5:55 PM
And less effect with high-wing than low-wing. Would depend a lot on on runway length and width. But right next to the conveyer it's a 60mph headwind.
I think it takes off even easier than without the conveyer because the conveyer is dragging a headwind. But it would feel weird because that wind would die out very quickly with altitude
August 17, 2025 at 4:29 AM
I think it takes off even easier than without the conveyer because the conveyer is dragging a headwind. But it would feel weird because that wind would die out very quickly with altitude
Don't care. Either way, we need to protect.
August 5, 2025 at 9:09 PM
Don't care. Either way, we need to protect.
I assume a typo. I think you meant:
Near-field->respirator masks,
Car-field->air filtration.
Near-field->respirator masks,
Car-field->air filtration.
August 4, 2025 at 5:33 PM
I assume a typo. I think you meant:
Near-field->respirator masks,
Car-field->air filtration.
Near-field->respirator masks,
Car-field->air filtration.
Right, caught me. I do know the mercury line, but thought I saw 255 and didn't want to misquote. Then my typo and now I can't find the ephemeral 255. Good thing I don't handle nuclear codes.
August 2, 2025 at 1:22 PM
Right, caught me. I do know the mercury line, but thought I saw 255 and didn't want to misquote. Then my typo and now I can't find the ephemeral 255. Good thing I don't handle nuclear codes.
Same website says 555 nm, so more dangerous than 222, but OK if mounted properly. Also claims ozone-free which is good. I like the fans for updraft feed, which is the right way. If the pictures are any guide, the visible blue light would be unpleasant for some rooms. Approval is great.
August 1, 2025 at 8:25 PM
Same website says 555 nm, so more dangerous than 222, but OK if mounted properly. Also claims ozone-free which is good. I like the fans for updraft feed, which is the right way. If the pictures are any guide, the visible blue light would be unpleasant for some rooms. Approval is great.
Thank you for providing English as well as French, since Bluesky doesn't do translation and doesn't allow copying text to paste into a 3rd party translator.
July 10, 2025 at 1:54 PM
Thank you for providing English as well as French, since Bluesky doesn't do translation and doesn't allow copying text to paste into a 3rd party translator.
I love this design. Can you say how much the grills reduce the flow? Can they be removed? Removing the wall-side grill would still look just as good.
July 3, 2025 at 2:39 PM
I love this design. Can you say how much the grills reduce the flow? Can they be removed? Removing the wall-side grill would still look just as good.
@nukit.bsky.social and I follow each other, and I'd welcome her help, by she's a busy lady!
June 26, 2025 at 6:13 PM
@nukit.bsky.social and I follow each other, and I'd welcome her help, by she's a busy lady!
I wish I had the skill, and the time, to do this kind of modeling for my wall-mounted unit for schools, both without, and then with, Far-UVC. bsky.app/profile/dtag...
Finally! I built & tested an open-source concept model air purifier that should be good for schools. Lots of air (CADR > 420 CFM), quiet (<45 dBA), uses <9 W, and ‘cause it’s wall-mounted & down-blowing, it moves air in the right direction & takes up no floor space. Always check my ALTs🧵⬇️
June 26, 2025 at 3:24 PM
I wish I had the skill, and the time, to do this kind of modeling for my wall-mounted unit for schools, both without, and then with, Far-UVC. bsky.app/profile/dtag...