Use screws to connect the device’s flange on the sash. Utilizing additional screws, attach an L-formed bracket to connect The underside window sash to the top window sash. This could reduce the window from accidentally opening. I'd personally also propose masking your AC condenser to the winter to shield it https://airconditionerinstallatio08528.blogripley.com/30152191/the-ultimate-guide-to-air-conditioner-installation