Independent Review · Updated June 2026

5 Ton 15 SEER Goodman Air Conditioner with Horizontal 24.5" Cased Coil

Energy Star 16 SEER horizontal coil delivers 54,000 BTU cooling in compact footprint

8.2
IndustrialRank Score
Efficiency
8.5
Reliability
7.8
Value
8.0
Installation
8.5
Warranty
8.0
5 Ton 15 SEER Goodman Air Conditioner with Horizontal 24.5
Current Price
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// Bottom Line
This 5-ton horizontal cased coil excels for contractors installing split systems in attics or tight mechanical spaces where vertical clearance is limited. The 16 SEER rating and Energy Star certification make it ideal for homeowners prioritizing monthly energy savings over years of operation.

Review

Goodman's 5-ton horizontal cased coil represents a solid midrange option for HVAC contractors specifying replacement indoor units. With its 16 SEER rating and Energy Star certification, this A-coil delivers measurable efficiency gains compared to older 10-13 SEER equipment. The horizontal configuration is specifically engineered for attics and similar installations where space constraints matter. At 54,000 BTU capacity, it handles full 5-ton load matching most standard outdoor condensers without oversizing complications.

Performance data confirms this coil meets modern efficiency standards. The 54,000 BTU cooling capacity pairs with R410A refrigerant and a scroll compressor to achieve 16 SEER operation. Line sizing follows industry standards with 3/8 inch liquid and 7/8 inch suction connections. Electrical requirements are straightforward, 208/230V single-phase at 60 Hz with breaker sizing between 29.6 and 50 amps. The 73 dBA sound level sits in the moderate range, acceptable for most installations but noticeable when the system runs continuously.

Pros & Cons

Pros

  • 16 SEER efficiency rating qualifies for Energy Star, reducing cooling costs year-round
  • Compact horizontal A-coil design fits challenging attic and basement installations with 38.25" height
  • Scroll compressor technology offers quieter operation at 73 dBA compared to reciprocating alternatives
  • 54,000 BTU capacity handles full 5-ton cooling load without oversizing
  • 10-year warranty with online registration provides solid protection for residential applications

Cons

  • Single-stage compressor cannot modulate output, resulting in less efficient part-load performance
  • 73 dBA noise level is moderately loud for homes with nearby living spaces
  • Requires 208/230V single-phase power, limiting installation in some older homes with three-phase service only

Who Should Buy

Best For

Contractors installing replacement split systems in homes with attic-mounted horizontal coil configurations will appreciate this unit's compact dimensions and straightforward installation. Homeowners in moderate climates seeking Energy Star efficiency without paying premium prices for variable-speed compressors are the target market.

Consider Alternatives If

Skip this unit if you need variable-capacity cooling for efficiency at part-load conditions or if you're installing in a room where 73 dBA noise would disturb occupants regularly.

5 Ton 15 SEER Goodman Air Conditioner with Horizon
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Installation

Installation requires standard HVAC practices and tools. The horizontal casing accommodates 50 feet of pre-insulated suction line with 3/4 inch insulation thickness, simplifying field connections. Mounting requires adequate space for the 35.5 inch width and depth dimensions. Technicians should verify 208/230V power availability and proper breaker sizing before startup. Goodman provides comprehensive installation manuals covering refrigerant charging, airflow verification, and startup procedures.

Warranty & Reliability

The 10-year warranty activates upon online registration with Goodman, providing coverage against manufacturing defects in compressor, coil, and components. Registration is essential, as coverage requires proof of purchase and proper installation documentation. This warranty duration matches industry standard for mid-tier residential equipment and protects against significant failures during typical equipment lifespan.

Specifications

SKULS38783850
Brand/ManufacturerOnline Supply
Cooling BTU54,000
RefrigerantR410A
Electrical208 / 230 V. 1 Phase 60 Hz
Warranty10 Years with Online Registration
Decibel Level (dBA)73
Weight (in lbs)30.000000
FeatureSpec
ConfigurationHorizontal
Liquid Line3/8"
Suction Line7/8"
Tonnage5 Ton
StyleA-Coil
Height38.25"
Width35.5"
Depth35.5"
ResourcesGoodman Brochure Goodman Specifications Goodman Installation Manual Goodman Warranty Information Goodman Service Instructions Goodman Kit Instructions Goodman Parts Manual You will need Adobe® Acrobat® Reader to view PDF documents.
Safety InformationPROPOSITION 65 WARNING This product and many products on our site may contain a chemical know to the state of California to cause cancer or birth defects or other reproductive harm. For more information about Proposition 65 please Click Here.
Energy StarYes
SEER1 (Efficiency)16
Condenser StagesSingle Stage
Compressor TypeScroll
Liquid Valve Size3/8"
Suction Valve Size7/8"
Max Breaker Size50 amps
Min. Breaker Size29.6 amps
Suction Line Insulation Thickness3/4"
Length50 feet

Frequently Asked Questions

What makes the 16 SEER rating significant for operating costs? +
SEER measures cooling output per watt consumed. A 16 SEER unit uses approximately 30 percent less electricity than 12 SEER equipment for identical cooling loads. Over 10 years, this translates to substantial energy bill reductions, typically $500 to $1,200 depending on climate and usage patterns.
Can this horizontal coil work with my existing outdoor unit? +
Yes, if your condenser is also 5 tons and uses R410A refrigerant. Line connections require 3/8 inch liquid and 7/8 inch suction sizing. Verify your condenser's capacity nameplate before purchasing. Mismatched tonnage degrades efficiency and can damage the compressor.
How does single-stage compression affect my electric bills? +
Single-stage compressors run at full capacity or off, without modulating output. During mild weather, this causes short cycling and efficiency loss. Variable-speed alternatives provide better part-load efficiency but cost significantly more. This unit suits climates with extended peak cooling demand.
Is 73 dBA too loud for indoor installation? +
Most residential units operate between 70-75 dBA. At 73 dBA, this coil is comparable to a vacuum cleaner, noticeable but not disruptive in attics or basements. Homes with mechanical rooms near bedrooms may notice noise; consider additional insulation if sound is critical.
Does online registration warranty apply if I buy this used? +
Original owner registration only. Used units lose the 10-year warranty period, though Goodman sometimes offers limited coverage for secondary owners. Verify registration status and purchase date when buying used equipment.

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