Central AC System GuideA packaged central air conditioner houses the compressor, condenser coil, and evaporator coil together in a single unit, usually placed on a roof or a slab. It is the counterpart to the split system and is common where there is no room for an indoor coil and furnace.
What a packaged unit is
Where a split system divides the equipment across an indoor coil and an outdoor condenser, a packaged unit consolidates the major assemblies into one enclosure. Federal guidance recognizes it as one of the covered residential formats.
That single-cabinet design is why packaged systems are often chosen for homes without basements or attic space for a separate coil.
Packaged units and the 2023 SEER2 standards
Packaged equipment is rated on the same SEER2 scale as split systems and was swept up in the same 2023 test overhaul. The M1 procedure that produced the SEER2 numbers applies across residential central AC types.
Because the test now loads the equipment with more realistic static pressure, packaged SEER2 figures read lower than the old SEER numbers for comparable hardware.
Efficiency thresholds and tax credits
Packaged central air conditioners carry their own federal tax-credit thresholds, set below the split-system thresholds. The credit itself is a percentage of project cost up to a fixed cap.
A homeowner comparing packaged equipment can use these numbers as a floor for what qualifies for the incentive.