Use screws to attach the unit’s flange to the sash. Utilizing added screws, connect an L-formed bracket to attach The underside window sash to the top window sash. This could protect against the window from unintentionally opening. Please see HomeAdvisor's Terms and Conditions for more in depth information on our https://airconditionerinstallatio97418.bloggerswise.com/36250624/the-basic-principles-of-air-conditioner-installation