The NiteAir system offers optimum darkening without interrupting the air flow from the outside to the inside. With a conventional roof hood darkening system, the air exchange is drastically reduced. Thanks to the patented NiteAir with AirMaze technology, the pleasant air flow is maintained despite the darkening (air flow 100% - light 1%). The NiteAir roof ventilation panel is simply attached to the inner frame of the roof hood from below with self-adhesive Velcro tape. Particularly suitable and recommended for MaxxFan, FanTastic Vent and all other roof hoods on the market.