Patented Design Pressurisation System Non-powered Stylish Airflow Grille: The grille allows airflow through the unit and prevents debris from entering the vehicle Patented Design: Clever system that manages the airflow distribution when driving or stationary Modern Design: Modern rooftop unit with a low profile and lightweight design Easy To Use: Changing the air filter is simple thanks to the ceiling cover that is easy to open and close Versatile Installation: Simple and clean design that can be installed in a range of rooftop openings from 285 x 285 to 400 x 400 mm Replaceable Air Filters: Additional air filters sold separately and can be changed in a matter of seconds Significantly reduces the amount of dust, harmful airborne particles and pollens entering the caravan Filters out dust particles with a PM10 filter Dust filters can be easily replaced from inside the caravan Reduces cleaning time after caravan trip Non-powered operation requires no opening or closing of vents Fits roof openings between 285 x 285 mm and 400 x 400 mm and roof thicknesses between 30 mm and 65 mm Low profile rooftop unit is extremely lightweight at approximately 5 kg