Multi head split systems have one outdoor unit and depending on the size of the outdoor unit, you can have up to 6 head units of the one outdoor unit. These can be high wall head units or cassette units.

This is a great idea if you have limited space or you don’t want multiple outdoor units on the side of your home.

Some people believe this would be a cheaper option than standard split systems, but it is not. Standard Split systems are often installed as a back to back installation, with multi head units there is usually only one head unit that is back to back with the outdoor unit. The rest of the units usually have pipes and cabling run through the roof to the indoor head units and depending if the unit is mounted on an internal wall a drain pump is usually required also.