this post was submitted on 08 Oct 2024
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I'd like to get one that has widely available filters and would prefer to spend less than $250 as much as I would like a Dyson one. It's only for an apartment so I don't think I need something massive but I do live above a busy road.

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[โ€“] [email protected] 40 points 1 month ago (6 children)

If looks dont matter, I'll recommend the same thing I always do when people want an air purifier.

Look into making a Corsi Rosenthal Box. They're surprisingly effective, and dirt cheap.

[โ€“] [email protected] 13 points 1 month ago (3 children)

It's not just about aesthetics. That DIY box will be loud as hell.

[โ€“] asret 4 points 1 month ago (1 children)

As mentioned in the article these can be quieter than a retail unit. The large fans move a lot of air and the large filter area means it's easier to pull that air through; both combined mean a lower fan speed is needed for a given throughput.

[โ€“] [email protected] 0 points 1 month ago

They can be. Because of course there are poorly made commercial units that are only quiet because they have low CADR. But you'll never be able to get a DIY box as quiet as a well made unit, unless you basically engineer your own air purifier device, use blower motors, etc., but that's not a Corsi-Rosenthal Box.

[โ€“] [email protected] 3 points 1 month ago

That'll help me sleep

[โ€“] [email protected] 2 points 1 month ago

I have one. It's not that loud. Even when you are standing right next to it it is easy to have a normal volume conversation.

[โ€“] [email protected] 11 points 1 month ago

This looks really cost affordable and efficient, but Iโ€™m not sure my wife will go for the DIY aesthetic.

[โ€“] [email protected] 9 points 1 month ago

Beat me to it. I've just been taping high quality filters to the back of my box fan, not as good, but helps in a pinch.

[โ€“] [email protected] 6 points 1 month ago* (last edited 1 month ago)

Alternatively, a single Merv-13 filter that's 4 or 5" in depth (20x20x5) taped to the box fan works just as well in a smaller footprint, and still allows you to direct the airflow at someone.

[โ€“] [email protected] 2 points 1 month ago

Thanks for the link. Very neat

[โ€“] [email protected] 1 points 1 month ago (1 children)

Does anyone know where I could find some 20-in wide charcoal filter cloth sponge material?

I would like to be able to have my filter reduce odor in the home as well but I can't seem to find anything other than little 4-in strips.

[โ€“] [email protected] 3 points 1 month ago* (last edited 1 month ago) (1 children)
[โ€“] [email protected] 1 points 1 month ago (1 children)

Nearly $400 might be a touch out of the price range, but thank you! At least I know that it exists so it's worth keeping on searching.

[โ€“] [email protected] 2 points 1 month ago

Haha, I figured but it's the best I could find in the moment.

They have pieces at 16*24 inches, but I couldn't find another that has 21 inch width.