This document describes an air curtain that can be installed at doors to prevent energy loss and the entry of insects and contaminants. It has a wireless remote control and manual on/off switch and uses a reliable German motor for steady airflow. The front panel and grilles are made of stylish aluminum alloy and ABS plastic for corrosion resistance and suitability for aluminum glass doors. Installing the air curtain can save up to 30% on electric bills while maintaining a comfortable room temperature and preventing small insects and contaminants from entering.