Ensuring ventilation, but effectively denying access to snow, rain, insects and unauthorised intruders - GRITEC ventilation grilles solve this demanding task in a particularly intelligent way. For example, by means of storm-proof aluminium blinds, highly effective perforated plates or a range of special solutions for very specific requirements. Poke-proof ventilation prevents condensation and ensures the dissipation of transformer heat loss. The individual elements can be flexibly adapted to the structural conditions and are suitable for installation in both doors and walls.