DIY Glowing Laundry Drying Fans

Introduction: DIY Glowing Laundry Drying Fans

About: I like cooking and high tech :) Happy to be here to learn and share a fulltitude of stuff

Hi everyone!

I made this project because I live in a apartment without a balcony or garden and drying my laundry took too much time. It's a really simple DIY that consist in glowing fans, they will create a light breeze on the clothes to help them dry faster. The glowing part adds a really cool effect and will also let you know when the fans are ON.
In this project, I will give you the guidelines I followed, this way you will be able to do the same, or just adapt the project to your needs.

So... here we g-l-o-w !!!


  • 4 fans

Notice: if your laundry is dripping wet, consider using IP67 fans. In my case, my clothes are not dripping

  • 12VDC power supply (1A, for 4x0.23A fans)
  • 3D printed parts : link to 3D files here:
  • Screw driver
  • glue gun
  • clamp
  • strip clamp
  • cable pigtails
  • voltmeter
  • heat shrink tube + heat source
  • optional humidity probe for the testing

Step 1: Material Review

Let's review the materials:

I bought 4 fans with this reference from Amazon: upHere120mm 3-Pin High Airflow Quiet Edition Blue LED Case Fan for PC Cases, CPU Coolers, and Radiators
They are really really quiet, which is good since I will be not too far from them.
If you want, you can get fans with color changing!! using a remote to control the color. I did not do it, but it can be nice to have a color changing atmosphere...
The fan specification indicates they can work up to 40 000 hours, which will be equivalent to more than 3333 uses!!! Indeed, I will use a timer so they will be on for 12h, (40 000 / 12 = 3 333) and since I do 4 laundries per week, this is equivalent around 17 years of use ( 3333/(4x4x12) = 17 ). Well 17years is long, I hope I will have a balcony by then :p

These fans are made to work with a 12VDC voltage and 0.23A (value not given in the specx but I found it printed on the fan). This will determine the power supply I will use.
Since I want to use a single power supply for 4 fans, I will need at least 4x0.23 = 0.92A for the DC power supply. Which means any 12VDC/1A (no less than 0.92A) power supply will do the job for 4 fans. I did not bought one for this project (I already add one).
One like this will do the job:

Notice: if your laundry is dripping wet, consider using IP67 fans. In my case, my clothes are not dripping, so regular fans are OK.

Then there is the wire connection, I wanted to easily connect or disconnect the fans, so I use this reference from amazon: Premium DC Pigtail Cable
This way I can connect and disconnect the fans easily, if one is broken, I can have a spare one ready.

We are almost done, the fans will need a 3D printing upgrade :

  • a pair of feet, so they can be move easily and be high enough on the floor. I 3D printed mine, but I think you can make one using wood or cardboard
  • a part that will drive the air flow toward the clothes: the air flow needs to be driven otherwise, the air will be blow on the side, which won't be effective

For the timer I will use a wifi Sonoff, like this one:
This way I can remotely controlled the fans (from an App. or even Amazon Alexa).

Step 2: 3D Printing and Assembly

3D parts are printed using PLA materials using theses files :

Then the feet are screwed to the bottom of the fans using the screw provided with each fan. I printed 2 feet per fan which is enough for stability.

The top part is hot glued to the fan.

Step 3: Wiring

Let's start with the wiring. You can solder the wires and use heat shrink tubes to protect the wires or use a kit like this one (what I did):

A very important step is to be sure where the positive and negative terminal of the fan and the power supply are located.

For the fan, look at the connectors, there are made to be use with a computer power supply, so the positive and negative are quite easy to find. Please look at the picture for more information.

For the power supply, you need check the positive/negative terminal. You can do as follow:

  • power supply OFF
  • strip a female pigtail ends
  • connect the red and black wires to a voltmeter
  • connect the pigtail to the power supply
  • switch ON the voltmeter
  • You need to be sure there is no contact between + and - before doing the next operation
  • switch ON the power supply
  • verify the value on the voltmeter. If the value the positive, then the + is on the red and - on the black. If negative, then it's the opposite
  • switch OFF the power supply
  • clearly identify the + and -

Now it's time to connect everything together. Using parallel connections, all the fans can be connected, please look at the schematic I made.

I plugged the DC power supply on a wifi controlled outlet, this way I can remotely switch ON/OFF the fans and use a timer, it can also be voice activated.

Step 4: Testing

Test each fans or pair of fans alone, then connect all of them. It's very important to connect all fans using parallel wiring (not in serie).

To check if the fan drying is effective I used to identical towels from the same laundry:

  • one without fans: drying alone, good drying conditions (nothing around, close to a window)
  • one with fans: drying with other clothes, which is bad condition for drying.

At first, both towels had a humidity of 99%. After 10h of drying the towel with the fans had a humidity of 70%, while the other was still at 99%. These results show that a light breeze is really effective.

Step 5: Conclusion

I made some calculus to compare a dryer and my 4 fans systems, figures are quite stunning. In comparison to a B class dryer, a 4 fans device uses >200 times less energy!!! Also, you can reduce the rotation speed of your laundry machine, meaning less power consumption!

Fans consume low power, so it can be connected to a solar installation, this way you'll have a really green indoor drying installation.

I made a chart for the pros and cons. Well I did not find cons for this DIY project, let me know what you think.

I hope it will be useful for you, happy eco drying!

Édit: one important point I forget to tell, and was reminded to me in the comment section, is to reduce the humidity in the room during the drying time. One can do so simply by opening a windows, the humidity will be able to go outside. It’s important to do so to maintain a healthy environnement. Too much humidity leads to moisture and even fungus apparition...

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    Question 2 years ago on Step 5

    Wouldn't it be safer to put the fans on top of the laundry?
    Wouldn't it change the efficiency of the installation?
    Thanks to you,
    Great idea!


    Answer 2 years ago

    Hello, thank you for your comment :) I think placing the fans under is more efficient, especially for big towels or bed sheets... my clothes are not dripping after the laundry so I'm ok, but there is IP67 fan that can be use to be safer, but the price is not the same...


    2 years ago

    build into your closet and keep all cloths dry and fresh. just hang wet cloth in the closet and forget about it. get a humidity sensor build in and its automatic.
    this setup also takes space, so should remove con from dryer.
    pro for fan, this can be your whole house humidifer if you need one for the dry winter


    Reply 2 years ago

    As an aspiring process engineer with quite some experience with drying processes, I appreciate the idea of fanning the laundry, but there is a problem that you kind of stated already: all the fans do is optimize the transition of water from liquid/bound to textile to vapor phase by removing water-laden air from the textile surface. They keep local relative humidity low,thus increase the humidity gradient and speed up the otherwise way slower vaporization process. However, what you should bear in mind is that with any gramm of water the laundry loses, you have 1 gramm of water in your room's air. Seems harmless by now but considering the weight difference of wet vs dry laundry, that is quite some water! And as absolute humidity is drastically increased, depending on your climate zone, wall heat insulation and room ventilation habits, you can have drastically increased danger of water condensation at cold surfaces, which can lead to fungi growing on walls etc. Actually that is one big plus for the dryer: it condensates the water and you can pour it away (this recommendation might be energy intensive, but it is also a serious safety issue) Of course you have the same water in the same room if you just let the stuff sit and don't apply the fanning and you also need to ventilate the rooms to get rid of humid air. But depending on tightness of doors and windows (actually less tight is better in this respect) you might have to adjust the room ventilation for the quicker humidification of the air! Please don't be threatened away from building cool and useful stuff but please also consider all the factors and be safe using it!


    Reply 2 years ago

    Hi Rievezahl! Thank for your comment, full of information. Usually when I’m drying my laundry I leave a windows or two opened, as you clearly stated to avoid high humidity level in the room. I remember when I was a student, I add a small apartment with big glass windows, leaving my laundry drying resulted in water dripping on the windows and even moisture ! It was really bad... I will edit my instructable to add a comment on this topic. Again thank you :)


    Reply 2 years ago

    Sry again..why can't I edit my comments? "Recommendation" was auto-incotrected and should mean "re-condensation" sry again for throwing these comments all over the place...


    Reply 2 years ago

    Sorry actually my reply says the same thing as yours, so is placed to the wronng comment. You know what I mean


    Reply 2 years ago

    good idea! thanks. But one must adds some vents to have a good airflow otherwise the humidity in the closet will stay there. Regarding the space, I do not agree, the space I use is under the place my laundry is, so technically I'm not using more space :) and having a dryer, means having to add room for it in my apartment, which meant a lot. Again, thank you for your comment Zatan !!