DIY build of a Corsi-Rosenthal box air filter
- 4x Philips AC2889 replacement H13 filters
- 4x SilverStone AP181 180mm fans
- 2x 46.1cm x 46.1cm x 10mm MDF wood (choose a location to buy where they cut your parts as well)
- 1x brushed motor controller or something else doing PWM (if control is necessary)
- 3D printed parts:
- screws:
- 32x 4.5x16 wood screws
- 16x M3 20mm++ thread screws + nuts
- some superglue, WAGO-clamps, power-adapters/step-up/step-down, customizations
- Insert the outside corners onto the top/bottom plate and screw them in place.
- Place the air filters on the plate against the outside corners, press the inside-corners lightly but firm against them and glue them in place. After hardening, screw them in.
- Place the 4 fans in the middle of the top-plate, mark the cutouts and leave some more space for the bridges pointing in the middle, for stability.
- Cut via Jigsaw or whatever you have. Does not need to be pretty, but better cut less than more, as you need to fill up anything overcut.
- Repeat 1+2 for the bottom plate, cut out all the inside you don't need (reduces weight) and fill with something less heavy than the 10mm MDF (cardboard for example)
- Prepare the fans electrically by soldering off the fan-speed signal wire (less clutter) and the speed-switch, bridge 1 and 3 as shown in the image to fix fan to full speed. (the image shows the fan-speed signal wire not yet removed, it's the rightmost wire)
- Prepare the fans mechanically by cutting off the inside corner, as we need to reach the holes to the middle, otherwise blocked off (or you need a long screw).
- Place fans in the middle, ensure nice placement with the holes and drill 16x 3mm holes for the threaded screws, then screw the fans on.
- Route your fan-wires to a side, make them as pretty as you want and combine into the controller (or directly your power supply).
- Supply 12V 1.4Amps however you like:
- USB-C charger boards are nice, just bridge the 12V pad and you're good. Search AliExpress for "Type C PD2.0 PD3.0 Fast Charge Trigger Polling Detector USB Boost Power Supply Change Module Charger Board"
- That random 12V supply you have laying around for too long
- 2x 5V mobile phone chargers (~3.5A needed)
- An old car battery
- Anything else you and your step-ups/step-downs you might have are capable of...
- 3D Print Controller Case in case you have the exact same thing as I do.
