What Is a Split System?
The most common residential setup. The system is "split" into two halves:
- Outdoor Unit: Condenser/compressor (rejects heat in summer, gathers heat in winter if it's a heat pump)
- Indoor Unit: Furnace or air handler + evaporator coil (conditions and blows the air through the ducts)
Pros: Higher maximum efficiency (up to 28 SEER2), wider variety of models, components are protected from the elements.
Cons: Takes up valuable indoor closet or attic space, installation can be more invasive.
What Is a Packaged Unit?
An "all-in-one" box containing the compressor, coil, and blower. Common in commercial buildings and Los Angeles homes with flat roofs.
Types:
- Packaged AC: AC + electric heat strips
- Packaged Gas/Electric (Gas Pack): AC + gas furnace
- Packaged Heat Pump: Heat pump + electric backup
- Packaged Dual Fuel: Heat pump + gas furnace
Pros: Saves indoor space, simpler single-piece installation (often craned onto the roof).
Cons: Lower max efficiency (typically caps at 16 SEER2), exposed to weather/sun, attractive to copper thieves if ground-mounted.
Packaged vs Split System
| Feature | Split System | Packaged Unit |
|---|---|---|
| Max Efficiency | Up to 28 SEER2 | Up to 16 SEER2 |
| Space Required | Indoor closet/attic + outdoor yard | Roof or side yard only |
| Installation | Two pieces + refrigerant lines | One piece + crane (if roof) |
| Lifespan | 15–20 years | 10–15 years (exposed to elements) |
| Typical Cost | $7,000–$12,000 | $8,000–$14,000 (with crane) |
Frequently Asked Questions
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