| CPC F24F 13/32 (2013.01) [F24F 1/031 (2019.02); F24F 2221/20 (2013.01)] | 21 Claims |

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1. An installation kit comprising:
a front panel having an opening configured to receive a portion of the an air conditioner positioned in a space between a window frame and a window, the front panel extending vertically to be coupled to the window frame on an indoor side of the space,
wherein the front panel includes:
a plate extending vertically and configured to be coupled to the window frame; and
a cutting groove recessed into the plate to define a plurality of cutting plate regions that are arranged vertically and are configured to be detachable from the plate to adjust a vertical height of the plate, the cutting groove being formed between the plurality of cutting plate regions.
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