CPAP Hose & Parts Dryer Box Parametric Low-Support

A compact forced-air dryer for CPAP hoses and accessories. A small 5 V DC blower in a sealed base pushes room air up through the chamber, washing over your hose and parts and out a 22 mm front spigot. Snap-together body, drop-in airflow divider, and grippy TPU feet.

Why it's nice to print

The body is an open-tube, low-support design — self-supporting snap beads and internal ledges mean no supports anywhere except a little under the front spigot. The divider, plate, and lid print support-free. The snap-fit lid and base plate come on and off easily by hand.

You'll also need (not printed)

• 1x 5 V DC blower fan (~75.7 mm square x 30 mm, 7530-style) with 2 M5 mounting holes on one diagonal
• - 2x M5 screws (mount the blower from below)
• - 5 V power for the fan (I used a fan that came with a USB connector)

Parts to print

• Box x1 (PETG) — chamber opening up
• Divider x1 (PETG) — flat, fins up
• Plate / fan carrier x1 (PETG)
• Lid x1 (PETG)
• Foot peg x4 (TPU 95A) — upright, ~5 mm brim (or use those self adhesive clear bumper pads you can get at the hardware store)

Print settings

PETG body on a textured PEI plate, 0.2 mm layers, no supports (except a little under the spigot); turn on elephant-foot compensation so the flat bottoms stay flat. TPU 95A feet printed upright with a ~5 mm brim at slow speed, no supports. Designed and tuned on a Bambu Lab X2D.

Assembly

1. Bolt the blower to the plate (2x M5 from below); lay the fan wire into the cable notch.
2. Press the 4 TPU feet up into the plate.
3. Snap the plate onto the bottom of the box.
4. Drop the divider into the chamber (port and fins toward the back) so it rests on the internal ledges.
5. Snap on the lid, power the fan, and connect your hose to the front spigot.

Co-designed with Claude CoWork (Anthropic) using the parametric-3d-printing skill — the CAD was generated and refined in CadQuery through conversation. Get the skill: https://github.com/flowful-ai/cad-skill