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Is nobody going to mention what a pain in the ass it would be to change all those filters regularly? I love in a somewhat dry and dusty area and need to change my filters (near the ground) every two to three months. I'd hate to have to climb up a ladder to change eight to nine filters that often.

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Unless your ceiling is very high you probably wouldn't need a ladder to change the filters on a productized version of this. Reach up, twist something to unlock, old filter slides out, slide in new filter, twist to lock. Repeat for each filter going around. Ten minutes every six months?

Not to forget, you'll have a looming black octagon after 6 weeks or so already depending on your environment. At least a reminder, that the filters are doing something useful.

I've been running a filter cube in my office 8hr/day since November. It's a bit grey, but far from black.

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