Haier Split Air Conditioner. Install mounting brackets.

Most models of window air conditioners have some kind of a mounting bracket. Some of these are the kind where the unit will rest on a bracket, while other use chains from the roof to help support the unit. Screw the brackets into place, being sure that you use the appropriate type of screws for your home. This means that you use wood screws for vinyl or wood sided homes, sheet metal screws for aluminum siding homes, and masonry screws for brick or stone homes. Check to make sure that the bracket is level before tightening down the screws completely. Use a level to ensure that the bracket is level. Close the window as much as possible.

Mini Split Air Conditioning. Insert the air conditioner.

Open your window, and place the air conditioner unit into the window and on the mounting bracket (if any). If necessary, have a friend hold the unit in place to help you make any adjustments. Many window air conditioners have a sliding "accordion" type of panel, open these all the way to help provide a weather tight seal. Use some small screws to help attach these panels to the window. Make sure that you use the appropriate screws for your window, wood screws for wood window frames and sheet metal screws for metal window frames.

Haier Mini Split. Weather strip.

Fill the gap between the window panes with some foam weather stripping. This weather stripping should have came with the unit, but if not you can easily purchase some from your local home improvement store.

Haier Mini Split Heat Pump. Secure unit to mounting brackets.

Tighten the screws on mounting bracket to help ensure that the unit is held into place. As you tighten the screws, double check to ensure that unit is flat and stable. Simply place the level on the top of the unit, and keep an eye on it to make sure everything is as it should be.

Seal upper sash. If your window opens upwards, then use some angle brackets to help seal the window tight. For windows that open to the side, do the same thing. Use the appropriate screw for the type of window that you have