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Cool! How long did the project take?

82% indoor humidity is really high; usually over 60% humidity you risk localized mold and mildew growth in moisture hotspot.

For AQI advice, it's hard to beat just adding an AirFanta 3Pro per 300 square feet or per rooms (excluding bathrooms). Designed by an engineer, it has the best dollar-to-perf and noise-to-perf ratio of any air purifier (thanks to choosing PC fans and balanced E11 filters[0][1]). The main downside is, some people think it looks a little nerdy....

Speaking of, to it a bit more visually substantial, you could mount the ePaper display inside a decorative photo frame of your choice, and fit the matte (the white area around the photo) to the screen size.[2] A local photo studio should be able to do this custom matte cutting at a very reasonable cost, and (considering the supplies and practice needed) it's probably the best option for a one-off project.

Cheers and thanks for sharing

[0] https://x.com/Engineer_Wong/status/1899144721710408038

[1] https://x.com/Engineer_Wong/status/2056588878564442334

[2] https://www.reddit.com/r/photography/comments/2ir1tu/matting...

Not OP, but thanks for the comment, in my research for cleaner indoor air custom fan-mounted purifiers came up as a cheaper and much more effective alternative to commercial air purifiers, but I haven't seen the Airfanta before.

Regarding humidifiers, do you have any links for further reading on the pollution aspect? I assumed that the distilled water ones wouldn't pollute the air, but I'm now realising I haven't actually checked.

I guess that most of the humidifiers sold on e.g. Amazon are the types you mentioned, do you have any recommendations in terms of brands/models?

Unfortunately even if you only ever use distilled water, crud and dust build up in the reservoir over time, and even start to grow bacteria. Technically the user manuals on these units will say something like to clean them every "use" (ie every day if used continuously), but realistically nobody does that.

Safer to use an evaporative pad humidifier that physically can't atomize crud into tiny pollution particles, then use a humidifier drops product to protect against bacteria.

It's so bad that it's cliche in the AQI world to ask "where's the humidifier" when someone complains of mysterious new dust buildup or PM2.5 spikes...

Tech Connections video: https://www.youtube.com/watch?v=oHeehYYgl28

Further reading: https://dynomight.net/humidifiers/

This storefront seems to have some good options (no affiliation): https://www.amazon.com/stores/page/43E58B1A-6C68-4879-9C38-7...

Very interesting, thanks for sharing!
> BTW 82% indoor humidity is really high

I looked back at the article, thinking maybe it was an outlier datapoint (like measuring near bathroom after shower)

but if average is 74% that IS really high.

I wonder if this is in a coastal region.

When I was young I lived in florida for a summer. I once naively put oreos in a cookie jar and eating one the next day was like biting into soggy toothpaste.

If you are going to build this, if possible switch the DHT for a Sensirion SHT40, 41 or a similar one. They are way better, and unless you are sourcing from Aliexpress binned stuff, they are similarly priced.