The portable air conditioner window seal can prevent hot air from flowing back, effectively reduce energy consumption and reduce electricity costs. Save more energy and enjoy the cool summer. You can open or close the window at any time without removing the window seal. Once the weather cools down, you can also remove it and reinstall it next summer to save money. Suitable for portable air conditioners, dryers, air dryers, and dehumidifiers. Circulation size: 35.4 x 82.7 inches, suitable for all standard window structures. It is suitable for the commonly used tilted window type. It opens to the left or right. It does not matter whether the window or skylight is hung at the bottom. Note: Cannot be installed on sliding doors and windows. Easy to install - no need to drill holes or use additional tools. Simply stick it to the inside of the window frame and the window itself. Attach the window seal to the hook. Then open the zipper on the window seal and place the air conditioning hose