Window Air Conditioner Support Bracket Supports 165 lbs, Universal for 12,000-24,000 BTU AC Units

The GNILLKO Window Air Conditioner Support is a heavy-duty universal AC support bracket that can hold units up to 165 lbs, designed for 12,000 to 24,000 BTU A/C units. In order to ensure a proper fit, the window sill thickness should not exceed 15 inches, must be at least 1 1/2 inches deep for base placement, able to accept 3-inch long screws, and the sliding window lip or stool cannot exceed 2 1/2 inches. This bracket cannot be used with slide casement or casement windows.

Constructed from solid epoxy-coated thick steel plate with a matte surface, the high-density material prevents the A/C unit from dropping out of the window. The block and spacer system allows for adjustment to match the inclination of the window sill, ensuring balance and proper installation. Full-rubber mounts are designed to snugly fit the siding wall, providing stability without causing damage to the exterior wall. An exclusive built-in bubble spirit level helps to correct mounting slope position.

The universal design of this window AC bracket fits units ranging from 12,000 to 24,000 BTU and supports up to 165 lbs. It is compatible with most window A/C units on the market, suitable for solid window sills, brick, cement, and solid wood, and can adapt to tilting installation surfaces. The adjustable leg extender design allows for flexible adjustment of the support arm length, accommodating various exterior wall types while reducing weight stress on window frames.

With a wall thickness capacity of 4'' to 15'', the bracket includes a built-in bubble spirit level for precise mounting angle adjustments. Installation is easy with the included hardware and instruction sheet, allowing for indoor installation by drilling into the window sill, eliminating the need for drilling holes in the exterior wall. The durable, high-grade steel construction is coated to prevent rust and rot, with a matte finish to keep the air conditioner securely in place. By transferring stress and weight from the window sill and sash to the support and window frame, this bracket ensures safety and stability.

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