Closed windows despite air conditioning hose. Mobile air conditioning systems transport the warm air out of the room via a hose, usually through the window. With the Be Cool BC04AIRSTPDF HOTAIRSTOP roof window seal, open windows up to 400 cm in circumference are sealed, with the hose being fed through the fabric to the outside. This saves a lot of energy and not only keeps warm air outside: Mosquitoes and the like are also kept out. Quick and easy installation. The Be Cool window seal is attached using Velcro tape, which can be removed at any time without leaving any residue. Roof windows with a bottom hinge can be opened and closed as usual. The Hot Air Stop seal is made of durable, water-repellent material and can be washed at up to 40°C. The set consists of seal, adhesive tape and instructions.