Honeywell - QuietClean Tower (HFD120Q)

I've made many CR boxes but I am kind of wondering if indeed they are cost effective. Like it can be $75-100 to make one new every 3-4 months, just buying the new filters, whereas I just bought two air purifiers at $100 each that don't have any replacement filter costs, so that's $100 to last for 2-3 years or more.

Two parts to my message: 1. Is to recommend looking into Honeywell Quietclean. I just bought two for $100 each in Canada, medium sizze ones, and they don't require buying replacement filters because they use a special technology. They were on sale because they're an old generation. I did see a sale or two in the US too when I was searching. From my understanding the technology is good, maybe not quite HEPA equivalent but possible close - and from my experience they work very well. There are a couple notes about using them, about the technology, I can add if you are thinking to get them. *(EDIT: just to add about the technology, it uses ionization but not the regular type - it only ionizes the particles that come close to the filter, to be able to trap them better, whereas regular ionization works by ionizing all particles and making them drop to the ground. So it produces a little bit of ozone but within safety guidelines, for instance it is certified under California's regulations. So that was one of the things I was going to add, but didn't want you to dismiss it outright upon hearing that is part of the technology).* 2. 'Rare immune disease' makes me think of COVID and how many complications it is proving to have. Most people don't pay enough attention, but it's not very forgiving. I would recommend to look into a "Still COVIDing" group and other places, like a sub or two on reddit, where you can learn more about immune problems etc resulting from COVID and how people are dealing with them. It sounds like your sister and her family may be going back to masking, if they had abandoned it before now (some people have kept it up interrupted since the start of the pandemic, including myself).

Look for Honeywell Quietclean. It's a different technology, and the big bonus is that you don't need to buy replacement filters\*. Last I saw it was $129 in USA. Do a search in this sub if you want more info on it. EDIT: \* you do need to buy replacement carbon filters if you want, because they aren't re-usable after you use the two that come with the purifier, but those are for VOCs - and in terms of particle filtering, it is all reusable filtering.

I love the ugly-ass Honeywell tower one i have. You can get washable filters too, which is a nice money saver. It's relatively quiet and powerful. Everyone should make at least one Corsi-Rosenthal box though because they are super effective!

Honeywell tower is a must!

I have a huge Honeywell tower that I loved for my old studio apartment, but now that I’m in a large house I honestly think corsi-Rosenthal is the best bang for your buck. They’re incredibly effective, cheap, good for large spaces, and customizable.