Fans for Radiator

I have a Speedcomfort set for my convector radiators to save energy. The original Speedcomfort is pretty expensive so I thought why not make it myself. I had an older broken graphics card laying around with beautiful fans.

First I dissembled the graphics card so that I can reuse the fans. After that I measured the fans and designed a casing for the fans. It had to be narrow to place above or under and between a radiator.

The fans blow the heated air faster in your room which saves some energy.

The following supplies are needed:

1. old graphics card, I used two 12V GPU fans with 86mm diameter for this concept.
2. 3D printed casing
3. Screws for mounting the fans.
4. Wire length enough to place it on your radiator.
5. Speedcomfort set or 12V adapter
6. jack plug 5.5mm

After wiring and testing the fans where spinning very fast with a lot of noise!!

So I used a voltage regulator (LM317 module) to lower the voltage to 3-4 volt. This module is great if you want to reuse a power adapter with a different voltage.

The fans are now spinning slower and quietly and works great for my radiator.

The 3D-print casing is build from PETG filament because of the heat of the radiator, PLA would melt and distorts.

You solder the wire to the fan and on the other side you can put a 5.5 mm jack plug which than can be coupled in series with other speedcomfort modules. If you don't have a speedcomfort set you also can use an adapter with a jack plug.

If you want to control the fans by temperature, like the speedcomfort, you have to put a temperature controller thermostat to it. The cheap W1209 module can be used. It is easy to use.