Triple 5015 CPAP

I wanted to do a CPAP part cooling, but I was too cheap and impatient to order the proper thing off of Aliexpress and then wait AAAAND I had a handful of 5015s laying around with somehow broken connectors. I wanted to put myself to the test and see if I, as a beginner, can use Fusion360 to actually make the manifold to put three 5015s into series. Well, here's the first iteration of it.

The model is fairly wonky in a way that the fan exhaust might not properly fit into the manifold openings, so I filed the ends a bit and eventually superglued the fans in there. Great if you too have 5015s that are in working order but you do not care how they look and are kind of disposable. However if you want best performance out of it, I recommend buying the 8500RPM models as these can really push some decent pressure, I myself used 5300RPM fans that are quarter of a price of one 8500RPM model.

Wiring is simple - they are connect in parallel as in red goes to red and black goes to black and the amps they draw are fairly low so I connected them all into a single plug.

After I did my first testrun I noticed that even after gluing the ends of the fans to the manifold there were still many air leaks and that's the interesting parts - fans themselves leaked air through the wire openings. I removed the stickers from the back of the motors, added some extra grease/oil, resealed with a strong adhesive tape and filled the wire path with glue. Just for the sake of it, I glued all the seams I found between the outside fan shroud and the manifold itself.

As I do not have a proper way of testing the air pressure, I did have an empty jam jar, tap water and some fun when toying around with the so called “water test”.

Here's a clip with Voron Stealthburner CPAP version with Bambu X1C hotend being tested.

I compared this to the original Stealthburner with single 5300RPM 5015 and MAK Vector duct that I used previously on my printer and the “hole” in the water was bigger than with both of the regular coolers.

IF you feel adventurous enough and have been looking into CPAP cooling, there this is a good start.


I printed it laying on it's flattest side using SNUG SUPPORTS. Layer height can be 0.2-0.3, layer width 0.4-0.5, walls and floor&top layer count 3-5 and infill 20%-40% depending of how funky you feel. As it's still a work in progress and I'm in no hurry to figure out it's last form, the print settings are quite open.