The energy-saving installation solution for air conditioning units. The window seal is attached using the included Velcro tape. It can be removed without leaving any residue at any time. Fits all common window constructions with a total perimeter not exceeding 400 cm. Easy and quick installation. The purchase costs are offset by the energy savings. Durable, water-repellent material. Convenient opening or closing of the window without disassembling the Hot Air Stop is possible at any time. The Hot Air Stop is washable at a maximum of 40°C. Practical use of the Hot Air Stop is also possible for exhaust dryers, both in warm and cold seasons. Delivery includes: Hot Air Stop, Velcro tape, user manual.