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