* what UV frequencies to use
* what intensity of light to use
* what volume of air can flow past it per second
I totally believe that UV light is great at killing pathogens and that UV belongs in ventilation systems, but we presumably need to know how much UV light is needed.
The UV doses needed also seem to depend on a lot on the type of pathogen. For example, viruses require a higher dose than bacteria. In
https://www.sciencedirect.com/science/article/pii/S019665531...
it required up to 6 times as much UV to inactivate viruses compared to bacteria.
Before that, I would sneeze first thing in the morning, then sneeze by rows of 10 times in Spring, 30 times a day, nose bleeding from too much sneezing. I would also have an irritated bronchitis which gave me slight asthma (but enough to make me abandon intensive sports). Now I still have risk of asthma, but at least when I want relief, I close the windows, switch on the Coway, and breathe fresh air. I live in a city center of average density.
However, CO2 fills up quickly. I wish I could find some portable air exchanger: Taking air from outside, exchanging temperature, and filtering. I’ve lodged a bit for a house which has that, I’m hoping I’m selected.
I don't have any measuring devices to see the impact directly, though.
- silent
- HEPA
- non-AI/IoT
I was afraid it was a paid sponsored comment, but after comparing versions and prices, I tried it and was satisfied. It’s ugly though, looks straight out of the 60ies with its rounded corners.
In this example, “sponsored”. A more accurate term in this case would have been something like “paid dishonest shill”, but the constant use of “sponsored” by paid shills (esp. on YouTube) has altered our perception of the word “sponsored”. I would not be surprised if soon many companies would like to move away from that word and not be “sponsors” anymore, and instead be “supporters”, etc.
It’s the reverse of the euphemism treadmill, really.
If it's an ionizer won't it be releasing Ozone into your filtered room?
That sounds like the opposite of what you want for asthmatics, chidren, etc.
The AP-1512HH sounds like a great buy for most cases, although if you're particularly concerned about VOCs including exhaust fumes (we are - we live in a dense city, close to a main road), the Austin Air HealthMate HM400 is probably what you want. Used by "FEMA and the Red Cross ... for deployment at Ground Zero and the surrounding areas in the aftermath of 9/11", apparently.
He also has a YouTube channel [2] that has a ton of useful information on proper ventilation, humidification, and environmental safety, along with podcasts [3]. You can also check out his main site, Building Performance Workshop [4].
Alternatively, there are books on the subject of "building performance" that you may want to check out.
[1] Home Performance Diagnostics Book: https://www.amazon.com/Home-Performance-Diagnostics-Advanced...
[2] Home Performance YouTube channel: https://www.youtube.com/c/HomePerformance/videos
[3] the Building Performance Podcast: https://buildingperformancepodcast.com/
[4] Building Performance Workshop: https://buildingperformanceworkshop.com/
https://www.odorstop.com/os72pro-72-watt-uv-air-purifier-wit...
quick DDG serch and here is a commercialized example that is basically imformative:
https://aristair.com/blog/what-does-an-hvac-air-purifier-do/
UV will kill covid, ionic species such as ozone will kill covid, and electrostatic filtration will adsorb particles based on electrical charge rather than mechanical porousity, keep them in place and let the UV+ Ozone do its job.
https://www.respilon.com/products/products/window-membranes/
I never could find any easy/good way to add UV to the mix without having to redo everything again, though. I wonder if anyone knows any easy/simple add-ons like the one we got to add a bidet to the toilet to deal with the TP shortages.