Wall air conditioners, also known as through-the-wall or in-wall air conditioners, are designed to be a long-lasting fixture. These 12,000 btu 3.5kW air conditioners are mounted into a hole in the wall as a permanent installation. Meets EN14511 standard and EU commission regulation 206/2012. R32 Refrigerant. Supplied with remote controller, this proven, well tested design is suitable for areas up to 23m³.