Exhauster Installation Base - 17 Degrees Sloped Ceiling

The use case: There is an Exhauster in the bathroom that needs to be replaced. The old and new Exhauster brands differ so the existing holes do not align. The ceiling has a slope of 17 degrees and an opening for a (malformed) tube to exhaust air. This opening is not centered to the existing holes for the screws.

This assembly solves the challenges as mentioned above:

• Align the position of the holes from 135x135 mm to 124x124 mm.

• Position the Exhauster horizontally.

• Align the exhaust opening in the ceiling to the center of the new Exhauster.

It consists of three parts:

• A Ceiling Mount that aligns with the old layout of the holes AND aligns the opening in the ceiling with the center of the Exhauster.

• An Adapter that is fitted to the Ceiling Mount and aligns with the new layout of the holes.

• A Collar that extends the exhaust opening to the Exhauster.

Yes, this is a very specific use case but I hope that the information provided below can be used as inspiration or a guide for similar cases.

Notes:

• The provided Ceiling Mount has its holes made symetrical for this publication as otherwise it is too specific.

Parts List

• 4x Screws for installing the Ceiling Mount.

• 4x M4 Bolt (16 mm minimum) for fixing the 17 Degrees Adapter to the Ceiling Mount.

• 4x M4 Bolt (16 mm minimum) for fixing the Exhauster to the Adapter. Given the available space I needed to use a Bolt with a hexagon socket for a couple of holes.

• 12x M4 Washer.

• 8x M4 Lock Nut (with nylon insert).

• Exhauster with holes at a distance of 124x124. Mine is a Svensa (Vent-Axia).

• Printed parts.

Notes

• Lock Nuts must be used because vibrations are expected during operation.

• In case the Exhauster is operating in a humid environment use stainless steel installation material.

Printing

• Fill Density: 30% because of the forces exerted by the installation material.

• Fill Patern: Grid.

• Perimeters: 3. Again, because of the forces exerted by the installation material.

• Support: None.

• Filament: PETG if the Exhauster is used in a humid environment. Also because it is less brittle so it can better withstand the expected vibrations.

Assembling

• Fit the Ceiling Mount to the ceiling using the Screws and Washers.

• Install the Adapter using Bolts, Washers and Nuts.

• Attach the Collar to the Exhauster and insert it in the exhaust opening in the ceiling.

• Install the Exhauster using Bolts, Washers and Nuts.