[mrfusion]

Here’s an idea I had for a humidifier. It simply tumbles thousands of tiny beads through tumbler with water at the bottom. Since the sheer number of small beads creates a huge surface area you’d get a bunch of evaporation.

Cool right? Feel free to use this idea as prior art.

[bootlooped]

There is a similar concept where you have a stack of plastic discs half submerged in a water reservoir. The axis of the disc stack sits parallel with the surface of the water. The discs are rotated so their surface is always wet. Air is blown over them. This passively humidifies the air, and won't over-humidify since as the RH rises the amount of water that will passively evaporate goes down. These units are sometimes also called "air washers" since small particles can get stuck to the surface of the wet discs and come off in the reservoir. I've owned two, and can confirm they do pull stuff out of the air.

https://duckduckgo.com/?q=venta+air+washer&iax=images&ia=ima...

https://i.ebayimg.com/images/i/282057161748-0-1/s-l1000.jpg

[aliswe]

Yes but energy intensive.

[mrfusion]

Couldn’t be worse than the ones that heat up water to make steam.

[aliswe]

That would need to be assessed, I think.