Use screws to connect the device’s flange into the sash. Using extra screws, connect an L-formed bracket to connect the bottom window sash to the top window sash. This will reduce the window from unintentionally opening. Only utilize a registered, trustworthy installer who is skilled in refrigeration and air conditioning. https://air-conditioner-installat42974.blogthisbiz.com/35745769/the-5-second-trick-for-air-conditioner-installation