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I agreed that I thought SU wouldn't work in today's internet, and I clicked on the cloudhiker link thinking I'd be met with SEO trash, but I ended up on this po
by rozap 3y ago
I agreed that I thought SU wouldn't work in today's internet, and I clicked on the cloudhiker link thinking I'd be met with SEO trash, but I ended up on this post: https://dynomight.net/ikea-purifier https://dynomight.net/ikea-purifier
Which was a great post and now I understand more than I did about how air filters work...more complicated than I'd thought.
Maybe I should give cloudhiker a try.
- genewitch 3y agoI read the page because you linked it, as an aside " (Yeah, power usage goes down when you add the extra carbon filter to the IKEA purifier. I’ve confirmed this myself with a power meter. Physics is weird.)" when you block a vacuum cleaner the motor spins faster and uses less electricity, it just sounds like it's "working harder" but if there's less stuff (air) there to create friction then it's working less hard. So the heavier filter material using less electricity makes sense, especially when you take into account the lower "CADR" - wtf-ever that is. Furthermore , all of my "DIY" air filters do a remarkable job, and they move very little air compared to the fans they're duct taped to, but they still turn black if i don't clean them every month or two.
- lowq 3y agoI swear that IKEA filter writeup was on HN once upon a time. That or someone else's thorough analysis of the exact same appliance!
- burkaman 3y agoYes it was https://news.ycombinator.com/item?id=31812259 https://news.ycombinator.com/item?id=31812259