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A DIY air humidifier made from reused obsolete components

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Darko Savic
Darko Savic Mar 02, 2022
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An easy-to-build DIY room air humidifier concept.
Why?
  • During dry months, when air humidity is low, this improves air quality and subsequently sleep quality.
  • It's cheap, durable, and easy to make at home from spare parts.
  • Quality commercial air humidifiers cost between 80$ - 350$. You can build this in 30 minutes for under $10 and it will be more durable.
  • Made from obsolete components that would otherwise end up in a landfill.
How it works
The header image illustrates the concept. It doesn't have to be that ugly. You could build the same concept into a flowerpot, a vase, or any nice-looking box that hides the fan and water.
The concept is pretty straightforward. A spare quiet computer fan could be pulled out of any old electronics. Chances are you have some lying around. If not, it costs less than $2 online. Likewise, any spare adapter would work to power the fan. The higher the voltage, the higher the rotation speed.
If you go for the bare minimum, a 2l PET bottle or any plastic canister can be cut so that the inlet fits the entire fan (whatever your size is). The outlet holes are purposefully made smaller than the inlet, so that slight overpressure and turbulence is created in the canister. As a result, water molecules on the surface are disturbed and evaporated at a higher pace. The process keeps adding humidity to the air in the room.
Computer fans are durable and use little power. You can leave such a humidifier permanently turned on. Only keep adding water when it's near depletion.
How could the concept be improved without increasing the cost?
2
Creative contributions

Test build

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Darko Savic
Darko Savic Mar 02, 2022
I made one. It seems to be outputting a comfortable air relative humidity of 48%.
Initially, RH was 45%, I turned the humidifier on and placed the RH meter where the wind could barely be felt. I let it run for an hour. The meter held at 48% RH.


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Goran Radanovic
Goran Radanovic3 months ago
I think you're onto something there. A few ideas on this platform are really awesome, and this is one of them. If designed attractively, I can see it selling well.
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Darko Savic
Darko Savic3 months ago
Goran Radanovic it could be built into the bottom part of a flowerpot with real plants growing on top. The canister in the bottom part is simply pulled out to clean and refill.
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Air dryer using the same concept

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Darko Savic
Darko Savic Mar 02, 2022
The same concept could work for drying air. Replace the water with rice or something that puffs up and retains moisture
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