Mounting window valves

• For installation in plastic or aluminium windows, air channel 33 is absolutely necessary.
• For special applications, e.g. when installing roller shutters, a flat grille can also be fitted instead of the weather protection grille.
• For plastic windows and comparable window profiles with "hollow chambers", the hollow spaces on both sides of the air channel must be sealed.
• The external grilles must be sealed watertight to the profile with weather-resistant sealant.