Let’s Talk Package Units vs. Split Systems—From Someone Who’s Installed Both
Hey folks, Mike Sanders here. If you’ve been looking into replacing your AC setup and keep hearing about something called a package unit, you’re probably wondering: Is that what I need? or Should I just go with a split system like most folks have?
Well, let me tell you—I’ve worked on hundreds of both. AC package units and split systems each have their place, but they are not interchangeable. That’s why today, I want to give you the full breakdown, straight from the attic, the roof, and the crawlspace.
We’ll talk about 5 ton self contained AC units, why 3 ton split systems still dominate the residential scene, and what I usually recommend to homeowners who want long-term performance and easy maintenance.
And if you're ready to buy, here's a great example of a reliable 3 ton bundle system: Goodman 3 Ton 14.5 SEER2 R-32 System. That one checks all the boxes for most homes—more on that later.
What Is an AC Package Unit?
Let’s start with definitions. A package unit (or “packaged unit”) is exactly what it sounds like: one big, self-contained system where the evaporator coil, condenser, and air handler are all built into a single cabinet. You usually see these units mounted:
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On rooftops (especially in commercial setups)
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On a concrete pad next to mobile homes or modular buildings
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On the ground outside homes without basements or attics
So, if you’ve been told you need a 5 ton package unit, that means everything is combined into one unit with 60,000 BTUs of cooling capacity.
These are especially common in commercial buildings or in places like Arizona or Nevada where space is tight and maintenance access is easier on the roof.
What’s a 5 Ton Self Contained AC Unit For?
When someone’s looking at a 5 ton self contained AC unit, here’s what I ask them:
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How big is your home or building?
5 tons = 60,000 BTUs, which is enough to cool 2,500 to 3,300 square feet depending on insulation, ceiling height, and climate. -
Do you already have ducts running through the attic or crawlspace?
Package units often need custom duct connections at the side or bottom of the unit. -
Is this a replacement or a new install?
If you're replacing a rooftop unit, sticking with a package is probably easiest. But if you're converting from a split system to a package, be ready for ductwork and electrical modifications.
For most residential homes, a 5 ton unit is overkill. Unless you’ve got a sprawling ranch with poor insulation or you're deep in the southern desert, 5 tons might be more than you need—and that’s where a good 3 ton split system really shines.
Split Systems Still Rule the Suburbs
Now let’s talk about what I install 80% of the time: central split systems. That means one unit outside (condenser), and one unit inside (air handler or furnace with coil). The two are connected by refrigerant lines, and the cooled air runs through your existing ductwork.
Why do I like them?
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Better zoning control – easier to modify airflow to different parts of the house
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Easier maintenance – parts are separate, so if your coil’s dirty, you don’t have to disassemble an entire cabinet
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Quieter operation – indoor unit is insulated and often placed away from bedrooms
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More efficient upgrades – want a better furnace? Just upgrade the indoor unit. Want better SEER? Upgrade the outdoor unit.
The Goodman 3 Ton 14.5 SEER2 R-32 Split System I mentioned above is the perfect example of how far these systems have come. You get:
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High efficiency (14.5 SEER2)
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Eco-friendly R-32 refrigerant
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Quiet, durable outdoor unit
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Factory-matched coil and air handler
And it’s easier to install in most homes that already have ducts and attic space.
SEER vs. SEER2: Why It Matters in Both Package and Split Units
Whether you’re looking at a 5 ton package unit or a 3 ton split system, don’t forget to look at SEER2 ratings.
As of 2023, the Department of Energy required all new AC equipment to be rated using the SEER2 standard, which accounts for more realistic field conditions like airflow resistance and static pressure.
Here’s how it breaks down:
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14 SEER (old rating) ≈ 13.4 SEER2
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15 SEER ≈ 14.3 SEER2
So if you're seeing a 14.5 SEER2 rating, like on that Goodman 3 ton system, that's equivalent to a 15.5–16 SEER under the old scale. That means it’s built for better real-world performance, not just lab tests.
Want a deeper dive? The Air Conditioning, Heating & Refrigeration Institute (AHRI) explains how SEER2 ratings work and what they mean for your energy bills.
Pros and Cons of Package Units
Let’s get honest about AC package units:
Pros:
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Space-saving – Everything’s in one cabinet
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Faster installation – No indoor coil or air handler to set
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Rooftop-ready – Ideal for flat-roof homes or businesses
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Easier for mobile/modular homes – When attic/crawlspace access is limited
Cons:
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Harder to service – You need full system access every time
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Noisier – The whole unit operates outdoors
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More expensive repairs – If one part fails, the whole thing may need replacing
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Shorter lifespan in some climates – Constant exposure to weather takes a toll
Also, the shipping and installation cost of a 5 ton package unit is usually higher than a 3 ton split system, unless you're replacing a similar setup.
Why I Usually Recommend a 3 Ton Split System Instead
In my experience, unless you’re dealing with a very large home or unique space restrictions, a 3 ton split system offers better long-term value and easier customization.
Most homeowners I talk to ask things like:
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How can I cool my home efficiently without tearing up my roof?
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How do I keep utility bills down without spending $10,000 on a high-end unit?
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What happens if one part breaks—do I need a whole new system?
The Goodman 3 Ton 14.5 SEER2 R-32 Split System checks all those boxes. And it’s designed for future compliance too—R-32 refrigerant is already on track to replace R-410A industry-wide. The Environmental Protection Agency (EPA) is phasing down higher-GWP refrigerants, and R-32 has a 68% lower global warming potential.
So you’re not just buying comfort—you’re buying into the future of HVAC.
A Quick Word on Installation: Don’t Wing It
Whether it’s a 3 ton split or a 5 ton self contained AC unit, installation is the make-or-break point.
Here's what matters most:
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Proper sizing: Use a Manual J load calculation. Guesswork = problems. Energy Vanguard has a great article on why oversizing is just as bad as undersizing.
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Matched components: Your coil, furnace/air handler, and condenser need to be compatible for optimal performance.
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Quality electrical and line set work: Leaky refrigerant lines or underpowered circuits cause endless headaches.
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Start-up diagnostics: Don’t just flip the switch—check pressures, airflow, static pressure, and refrigerant charge.
If your installer skips any of this, find a new one.
Final Thoughts from Mike
Look, there’s no “one size fits all” in HVAC. But here’s the honest truth:
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A 5 ton package unit is great if you have a big building, rooftop access, or a mobile home.
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A 5 ton self contained AC unit can work well for commercial or open floor plans, but you better size it right.
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A 3 ton split system, like the Goodman R-32 bundle, is what I recommend for most homeowners looking for value, performance, and future-proof refrigerant.
If you’re on the fence, my advice is simple: work with someone who understands your home layout, ductwork, and climate zone—and who’s not trying to upsell you something oversized just to make a buck.
You can check out the full specs for the Goodman 3 Ton 14.5 SEER2 R-32 Bundle here. It’s the kind of system I’d install in my own house—or my mom’s.
And that’s saying something.
Got questions about package units vs. split systems? Drop a comment or give us a call—I’ll help you find the right setup for your square footage, budget, and comfort. No pressure, just honest advice.
