How to mount an aerator on a porthole for more cabin air


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porthole aerator
In this article we explain, in nine steps, how to install an aerator on a porthole for more cabin air

If you suffer from heat at night, and when you return to the boat after a few weeks you find it full of humidity, you can begin to solve (some of) these problems by adding an extra aerator to allow constant air recirculation.

More air in the cabin? Here’s how to do it

To place a new one you have to drill holes in the hatch and install an aerator, possibly stainless, but most importantly watertight. Almost all companies sell them with mounting kits with a template with guides for the holes and mounting screws. You will need to put in a drill and screwdriver.

aerator drill
Use the drill well. To avoid chipping and ruining the porthole, cover the surface with an acrylic sheet before drilling and make an invitation with a smaller drill bit before drilling.

Be careful to drill as in the drawing above, so as not to risk chipping the porthole.

How to mount an aerator on a porthole

Porthole aerator - 1

1. Place the template to mount the aerator on the porthole. Carefully take measurements to secure it in the center.

2. The acrylic sheet is to avoid chipping the porthole with the drill. Before drilling, make an invitation with a smaller drill bit.

Porthole aerator - 3

3. Using a round bit, drill the center hole on both sides of the fenestration. Use a stand as in the photo.

Porthole aerator - 4

4. Now that the center hole is done, you can proceed to drill the holes for attaching the aerator plate.

Porthole aerator - 5

5. Again, it is best to drill from both sides of the porthole to avoid chipping the plexiglass.


6. Now you can take the aerator and properly place the o-rings, gaskets, and internal components.


7. Mount it this way to prevent the internal parts of the aerator from falling out.

Porthole aerator - 8

8. Screw in the fixing screws supplied with the aerator from the inside.

Porthole aerator - 9

9. The work is finished. The aerator is fitted and now you will have more air in the cabin.

*Images are taken from the Lewmar catalog.



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