Having flyscreens in my windows has reduced but not eliminated the amount of mosquitoes that get into my house.

One of the main reasons I suspect is that the louvre vents for the natural ventilation systems do not have a flyscreen.

Now having a 3D printer, I set out to fix this. First I measured the dimensions of the existing vents; they are 20×20 cm. Then I replicated the look and overall size in FreeCAD as shown below.

My design consists of two pieces. The outside looks like the original vent. Inside that fits a rectangular frame that the flyscreen is to be bonded to.

Both of these parts were sliced using PrusaSlicer and printed on my MK4S in white PETG. 3mf file for outside and 3mf for frame are available.

Both parts were printed.

Flycreen material was bonded to the frame using double sided adhesive tape.

Then the frame is placed into the vent. The flyscreen material I used is thin, so the double sided adhesive tape is enough to fix the frame in place.

When using thicker (glass fiber) flyscreen one could use adhesive or caulking to fix the flyscreen and frame into the vent. In that case one might also want to reduce the thickness of the frame accordingly.

The vent is then installed. The edges are caulked all around.

Looking forward to a mosquito free summer.

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