■ FUNCTION: The Neolia ventilation grilles with a 50 cm² section are installed inside or outside. They allow an air supply in the room served in compliance with the gas regulations for the following case: - Gas appliance: air outlet by vertical duct, direct and indirect air supply, Pu ≤ 25 kW - Fireplaces and wood stoves: Pu ≤ 8 kW ■ DESCRIPTION: Its design and range of colours are aesthetically pleasing indoors or outdoors. It has been thought to maximize the passage section. Its baffle design breaks the outside air flow and diffuses the air inside. The grille fits on a tube. It can be removed and easily cleaned. ■ ACCESSORIES: A mosquito net prevents insects from passing through without reducing the passage section of the ventilation grille. It is flexible and can be easily installed in a tube. It is also easy to remove and clean. CHARACTERISTICS: - Cross-section of 50 cm² - Can be clipped onto Ø100 PVC pipe ■ IMPLEMENTATION: 1 Make a wall crossing using a Ø100 sealed PVC tube. (Use a tube that is not pre-channelled) 2 Fold and then insert the screen into the tube. (optional) 3 Position the screen by clipping it into the tube.