- Keeps the cool air in and vents hot air out: The window seal set for portable air conditioners directs hot air outside while retaining cool air inside the room, helping your air conditioner cool the space faster and more efficiently. It also blocks insects and spiders from entering through window or door seams. - Energy saving: Reduces energy consumption and CO2 emissions. MOEGFY air conditioning window kit helps lower electricity bills and supports environmental protection. - Practical and economical: Made of durable, waterproof material. Zips between the window and window frame to regulate air exchange and keep dust and rain away. You can open or close the window at any time without removing the seal. - Compatibility and installation: Suitable for frequently used tilting windows or sashes. Works with windows that open to the left or right, bottom-hung windows, or skylights (not sliding windows or doors). Not compatible with left- and right-sliding windows or doors. - Use scenarios: - In hot summers, use with a portable air conditioner in a bedroom or living room to retain cool air and reduce energy use. - Install on windows with gaps to keep insects and spiders from entering while venting air. - Vent a room during windy or rainy days while keeping dust and rain out and preserving a comfortable indoor environment.