When opting for an AC system, consider your needs. While split AC systems are preferred by homeowners who want their system to be retrofitted to an existing furnace, hybrid heat split systems are an ideal choice for homes in temperate climates. If you are looking for a system that offers superior safety and can be easily installed, go for a ductless split system. If you want your system to be installed outdoor, opting for a packaged heating and air conditioning system makes sense.