Use screws to connect the device’s flange for the sash. Utilizing more screws, attach an L-shaped bracket to attach the bottom window sash to the highest window sash. This may protect against the window from accidentally opening. Make sure you see HomeAdvisor's Terms and Conditions For additional in-depth info on https://marcodedaw.ttblogs.com/9121608/not-known-details-about-air-conditioner-installation