Parametric Hose Pass-Through Clamp for Portable AC (PortaSplit / Midea)

Parametric Hose Pass-Through Clamp for Portable AC (PortaSplit / Midea)

A two-piece parametric clamp designed to route the flat oval exhaust hose of a portable air conditioner (Midea PortaSplit) cleanly through a window panel or plywood insert.

The clamp consists of two identical halves that sandwich the hose from front and back. The U-shaped opening means you can slide the hose in from the side without disconnecting it. Oval screw slots allow fine positioning adjustment when mounting to the panel.

Designed to be printed in a flexible filament such as PEBA so the clamp conforms slightly to the hose and can accommodate self-adhesive foam tape for sealing against drafts and rain. But any plastic will do.

Features

• Fully parametric OpenSCAD source — adapt to any hose size or panel thickness

• Two-piece split design, hose slides in from the side

• Oval screw slots for adjustable positioning on the panel

• Rounded corners for a clean finish

• print_mode parameter to render top half, bottom half, or both for preview

Print settings

• Material: PEBA or other flexible filament recommended; rigid PLA/PETG/etc also works

• No supports needed

• 3–4 perimeters recommended

• Print slowly (20–30 mm/s) if using flexible filament

Possible improvements

• Adapt the shape of the hole to the precise shape of the tube

• Add a groove on the mating face for an O-ring or foam tape seal

• Add alignment pins/holes so the two halves locate precisely when assembling

• Add a chamfer at the hose entry to guide it in more easily

• Add countersunk screw holes instead of oval slots for a flush finish

• Parametric support for a second hose (some units have two exhaust hoses)

Other designs exist for this purpose, but none I found were fully parametric. I designed this one with the help of Claude (Anthropic) so it can be easily adapted to different hose sizes and panel thicknesses.

See also: clamps to fix the window panel.