The Toshiba wall-mounted indoor unit offers excellent performance for multi air conditioners, with a power of 18000 btu. Multi-split air conditioning systems are ideal for installation in multiple spaces, saving space on the balcony or in the garden. It is important to ensure that the outdoor unit has the appropriate power to support all connected indoor units, so that they operate simultaneously with the best performance. Also, proper placement of the outdoor unit is crucial, so that the length of the connecting pipes to the indoor units does not exceed the specifications set by the manufacturer.