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Hello there, thank you for your question about the LG LW2521ERSM. This model is designed as a window air conditioner and is not intended for wall installation. Using it in a wall may affect the performance and safety of the unit. For proper installation options, we recommend consulting the user manual or contacting our team. Please send us a private message on Social Media @LGUSSupport, and we'll be happy to assist you further. Thank you for choosing LG. —Avril
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