Improper window ventilation may cause adverse effects on health and property. LG's Hausys IoT window handle provides the best ventilation guidance, from analysis of detected indoor / outdoor air quality and weather data from content providers. The guidance on the handle display can help to prevent health and property damage from indoor / outdoor air pollution and rain / snow inflows. LG's Hausys handles maximize the harmony of the window by choosing a design that hides the, somewhat ugly, LCD device and displays the more aesthetically attractive GUI.