[crazygringo]

They don't seem like it.

Levoit filters are advertised as lasting 6–8 months and cost $23 each.

Meanwhile a set of four filters like the one in the tutorial cost $70 and looking up comparables online at that price point indicates they're good for 3 months.

So even if using 4 at a time extends to 12 months, that's still more expensive than the up-to-2 Levoit filters you'd use in that time.

I see zero cost benefit here over Levoit -- it seems to be more expensive actually?

[neogodless]

The Levoit mentioned (I have one) is tiny and only good for a small room. The comparison box fan filter can clean a lot more air over the same time period.

[crazygringo]

It's good for a large room, not just a small one. I have one too.

The CR box is tremendous overkill for something like an apartment. It's gigantic and I don't even know where most people would put one even in a house.

But it's also not what the original post was talking about. The original post is a device akin to a Levoit in terms of size and power.