Exhaust of Ambient Heat: The airtight window seal for portable air conditioners and dryers seals the hose between the window frame and sash, thus evacuating ambient heat through the hose of the portable air conditioner. Our airtight window seals prevent the breeding of insects and mosquitoes, creating a cool indoor environment during hot summer days. Improve Cooling Performance: The window seals for portable air conditioners seal around the window and pull on the hose that exhausts cold air to the outside. This clever design instantly cools your room and the air conditioner provides excellent cooling performance for your comfort. Affordable and Economical Solution: The airtight hose seals for air conditioners help reduce energy consumption and CO2 emissions. A well-designed exhaust ventilation system allows you to reduce your electricity bills while enjoying efficient cooling thanks to our window seals. Quick and easy installation: No drilling required. Simply stick the sealing fabric to the inside of the frame and window. Then, secure the air hose inside the air conditioner sealing kit with a cable tie and close it with a cable tie to exhaust the air to the outside. Universal compatibility: This 157-inch portable window air conditioner kit is compatible with all portable air conditioners and dryers. It is also compatible with most windows with a maximum circumference of 400 cm. Whether you have a crank or casement window, the exhaust bracket is easy to install.