Package Unit vs Split System
OK, what are the advantages of each for residential use.
Split systems are what are most always used. It requires longer and more skilled installation. Plus the attic seems to be the worst place for the evaporator coil to operate and be serviced.
Reading here, a good installation is a must. So it seems a package unit would be simpler to install, easier to service, and in a more comfortable environment.
Since I've never seen a package unit for a home, there must be an obvious reason.
I would figure with most new homes
having attached garages, there would be more effort into hanging the split system
air handler and evap coil in the garage. With all the pre-fab truss roofs you'd think it would make for an easier install and service down the line.