Cord operated non-electrical fan with stormguard, shuttered for toilets, boats, caravans and sheds etc. Performance: 9000mm2. For use with single pane glass. Aperture 162mm. All Vent-A-Matic models are designed for simple two part fitting into the glass aperture. For additional security and weather tightness, a little silicone glazing sealant can be applied to the external retaining ring. Vent-A-Matic ventilators can be cleaned with normal window cleaning materials. Model 106S.