These are a completely waterproof version of the ECS Ventair/Ventilite ventilators. In cases of excessive water flow over the decks or coach roof, an inner sleeve complete with flush handle, is closed by moving in an upward direction to ensure 100% waterproofing.
This simple operation is carried out from within the cabin or wheelhouse, and vice versa; a downward motion returns the unit to the standard Ventair/Ventilite version. The inner sleeve does not inhibit airflow under normal circumstances.
The inner baffle fits into a 92mm deck aperture and has a depth of 18mm below deck.
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