Window Unit Support Kit (Heavy Duty) Air Conditioner Bracket by Outland Eng.. $44.99. Holds up to 160 lbs. Easy installation. This window air conditioner support kit makes window unit installation a snap. This particular kit can be used for 5,000 to 24,000 btu units.
Mounting a Standard Air Conditioner in a Sliding Window (From the Inside, Without a Bracket)
How to make a frame so a horizontal ac unit can fit in a vertical casement window. This also makes it easier to remove the ac and take it with you when you leave, ensuring you get your apartment deposit back.