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