Horizontal Discharge Package Units vs. Split Systems: Pros, Cons & When to Choose Goodman’s Horizontal Package

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Introduction

You’ve probably seen both styles — the big all-in-one “box” outside (that’s a package unit) and the two-part setup with an outdoor condenser and an indoor coil (that’s a split system).

If you’re replacing your system or building new, this choice can make or break your comfort — and your budget.

The Goodman 2.5-Ton 13.4 SEER2 Self-Contained Horizontal Package AC Unit is one of the most popular models I install for single-story homes, mobile homes, and spaces with limited attic access. But is it right for you?

Let’s break it down like we do in the field — no jargon, no guesswork — just real pros, cons, and the key differences that matter when you’re choosing between a horizontal discharge package unit and a split system.

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1. What’s the Difference Between a Package Unit and a Split System?

Think of it like this:

• A split system has two parts — an outdoor condenser and an indoor air handler or furnace coil. They’re “split” apart by refrigerant lines.

• A package unit has everything in one cabinet — compressor, condenser, evaporator coil, and blower fan — all outside, connected directly to your ducts.

Package Unit

Everything’s outside. Air ducts connect to the cabinet through a short plenum.
Ideal for: homes without basements, tight crawlspaces, or mobile homes.

Split System

Outdoor condenser + indoor air handler (or furnace).
Ideal for: homes with existing ductwork in basements, attics, or closets.

(Energy.gov HVAC Types Overview)

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2. Why Goodman’s Horizontal Package Design Stands Out

Goodman didn’t just slap components into one box. Their horizontal discharge design sends air out the side, not the top, which keeps airflow consistent and noise lower — especially when installed near patios or bedrooms.

Key features of the 2.5-ton Goodman horizontal package:

• 13.4 SEER2 efficiency (meets 2023 DOE standards)

• Compact single-cabinet design

• Horizontal airflow — ideal for rooftop or ground installations

• Factory-charged with R-410A (new R-32 versions coming soon)

• Galvanized steel housing with baked-on powder coat

• Service access panels for quick maintenance

• 10-year parts warranty

(GoodmanMFG.com Product Details)

If you like things simple and reliable — less piping, fewer leak points — this design is a breath of fresh air.

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3. Installation Differences: Where Each System Fits Best

When I walk into a job, this is my first question: “Where can we run your ducts and refrigerant lines?”

Because that’s what determines your system type.

If you live in a single-story home without a basement or attic, the Goodman horizontal package will save you money on installation and future maintenance.

(AHRI Installation & Maintenance Guidelines)

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4. Pros of a Horizontal Package Unit

I’ve worked on every setup under the sun, and here’s why package units like Goodman’s are winning over homeowners:

✅ 1. Easier Installation

No indoor coil, no refrigerant lines snaking through your walls — it’s plug-and-play for a pro. You can go from delivery to cool air in a single day.

✅ 2. Lower Labor Costs

Less material, shorter wiring runs, and no indoor air handler setup. That’s $800–$1,200 in savings right off the bat.

✅ 3. Compact Design

Perfect for tight properties, manufactured homes, or rooftop mounts where space is a premium.

✅ 4. Simple Service

Everything’s accessible from one cabinet. No attic sweat-fests or cramped furnace closets.

✅ 5. Reduced Noise Inside

Since the blower and compressor are outside, indoor sound is next to zero.

(HVAC.com — Package System Advantages)

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5. Cons of a Package Unit

Of course, there’s no perfect system — every design has trade-offs.

⚠️ 1. More Exposure to Weather

All major components sit outdoors, so regular coil cleaning and inspection matter more than ever.

⚠️ 2. Slightly Lower Efficiency Potential

Split systems can hit SEER2 ratings above 18–20, while most package units (like Goodman’s 13.4 SEER2) sit in the midrange.

⚠️ 3. Roof or Pad Mounting

You’ll need a level pad or structural roof support. That adds a little to the installation cost.

⚠️ 4. Accessibility for DIYers

Even though service is easy, most repairs still require a pro due to refrigerant handling.

(Energy.gov — Maintenance Best Practices)

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6. Pros of a Split System

For fairness, here’s why some homeowners still choose split systems:

✅ 1. Higher Efficiency

More coil surface area, modulating compressors, and variable-speed air handlers give them an efficiency edge.

✅ 2. Better Zoning Options

You can pair with advanced thermostats and dampers for multi-zone comfort.

✅ 3. Indoor Component Protection

Your indoor coil and blower stay sheltered from weather, with less corrosion over time.

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7. Cons of a Split System

But those perks come with some strings attached:

• More complex installation = higher labor costs

• Refrigerant line runs can leak or lose insulation efficiency.

• An indoor blower means more noise near living spaces.

• Requires attic, closet, or crawlspace access

• Maintenance often needs two separate service visits

So, unless you’re chasing ultra-high efficiency or have a large multi-level home, the simplicity of a package unit often makes more sense.

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8. Noise & Comfort: Where Package Units Shine

Here’s something most buyers overlook — noise distribution.

Split systems put a blower inside your home, which means that the “whoosh” you hear in the hallway.
With a horizontal package, the noise stays outside.

Goodman’s horizontal discharge fan design throws air sideways at a lower velocity, reducing turbulence. The result?

• 76 dB average vs 82–85 dB in older vertical units.

• Zero indoor vibration since the blower sits outside.

If you enjoy peace inside, you’ll feel the difference immediately.

(AHRI Sound Ratings Database)

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9. Efficiency & Energy Use Comparison

Here’s how both systems typically perform in real homes:

For most homes, that $10–$20 monthly difference doesn’t outweigh the simplicity and reliability of a package system — especially when you factor in lower install and service costs.

(Energy Star — HVAC Efficiency Guidelines)

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10. Maintenance and Longevity

Goodman builds package units with galvanized steel and corrosion-resistant coatings, but they still live outdoors 24/7 — so maintenance is key.

Tony’s Quick Maintenance Plan:

• Replace filters every 60–90 days.

• Rinse coils twice a year.

• Keep shrubs and grass 2 ft away.

• Inspect electrical connections annually.

• Level the pad if it shifts.

Expect 12–15 years of life with regular tune-ups — easily matching most split systems.

(HVAC.com Maintenance Checklist)

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11. Tony’s Real-World Example — South Carolina

Last summer, I installed two systems side-by-side in Myrtle Beach.

• Home 1: 1,400 sq ft single-story using the Goodman 2.5-ton horizontal package.

• Home 2: Same size, same brand, but a split system.

After 90 days:

• The package unit install was $1,200 cheaper.

• Indoor noise dropped by 40%.

• Energy bills? Within $12 of each other.

The homeowner with the package unit told me:

“It’s quiet, cool, and I never have to climb into the attic again. Worth every penny.”

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12. Which One Should You Choose?

Here’s Tony’s breakdown:

Go with a Horizontal Package Unit if:
✅ You have no attic or basement.
✅ You want a quick install and lower cost.
✅ You prefer minimal indoor noise.
✅ You’re replacing an older rooftop or slab-mounted unit.

Go with a Split System if:
✅ You have attic/crawlspace access.
✅ You want premium efficiency or zoning.
✅ You’re building new and can plan ductwork layout easily.

Most single-story, moderate-climate homes will get the best long-term value from Goodman’s horizontal package unit.

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13. Tony’s Final Verdict

When you strip away the marketing, the horizontal package AC wins for simplicity, reliability, and lower total cost of ownership.

It’s the no-nonsense option that just works — fewer parts, easier maintenance, and quiet comfort year-round.

If you value easy service access and a cleaner look outside your home, Goodman’s 2.5-ton 13.4 SEER2 self-contained unit is a top-tier pick.
It’s built to handle the heat without breaking your budget — or your patience.

Let's learn about maintenance by Tony in the next blog.