Vent Axia 12 Inch Window Fan This popular range of extract/intake ventilating units continues to satisfy the most demanding requirements of efficient ventilation. The Standard range unit is supplied without a shutter. The shutter is available as an accessory which can be easily fitted within the unit. Suitable for most forms of single glazing or can be wall mounted in a Vent-Axia fixing plate. Vent-Axia's patented spigot & ring method of fixing ensures easy installation & weather proof joint. The simple integrated component design makes installation & servicing easy. Easy Cleaning: Integrated component design allows all parts to be dismantled for cleaning without the use of specialist tools