Independent Review · Updated June 2026

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

Energy Star horizontal coil hits 16 SEER1 efficiency in compact 3-ton package

7.1
IndustrialRank Score
Efficiency
8.5
Reliability
7.0
Value
6.5
Installation
7.8
Warranty
8.0
3 Ton 15 SEER Goodman Air Conditioner with Horizontal 24.5
Current Price
$0
Check Price at HVACDirect → Shop Now at HVACDirect
Authorized dealer · Full manufacturer warranty
// Bottom Line
This horizontal A-coil makes sense for retrofit applications where space is tight and you need solid efficiency without breaking budget. Best suited for homeowners upgrading from older systems where ductwork limits vertical coil installation.

Review

The Goodman 3-ton horizontal cased coil addresses a real market need for retrofit installations where space constraints rule out traditional vertical configurations. This unit delivers 34,800 BTU cooling capacity using a proven scroll compressor paired with R410A or R22 refrigerant compatibility. The horizontal A-coil design measures 24.5 inches tall, 26 inches wide, and 21.125 inches deep, fitting comfortably in tight attic and crawlspace applications where contractors commonly struggle with placement.

Efficiency is the main story here, with a 16 SEER1 rating that exceeds the advertised 15 SEER specification and qualifies for Energy Star recognition. The single-stage compressor uses 208/230V single-phase power with a 30-amp maximum breaker, keeping electrical requirements manageable on most residential panels. However, the single-stage design means the compressor runs at full capacity until satisfied, rather than modulating to part-load conditions, which can reduce overall seasonal efficiency during mild weather months.

Pros & Cons

Pros

  • 16 SEER1 rating exceeds the 15 SEER rating claimed, delivering genuine Energy Star certification
  • Compact horizontal design fits tight attic and crawlspace installations where traditional coils won't work
  • Scroll compressor is proven technology with better reliability track record than rotary designs
  • Dual refrigerant compatibility with R410A and R22 allows retrofit flexibility on existing systems
  • 10-year warranty with registration provides solid coverage for parts and labor concerns

Cons

  • Significant spec discrepancy: unit listed as both 3-ton and 5-ton creates confusion about actual cooling capacity
  • 73.5 dB noise level runs moderately loud for residential use, especially in confined attic spaces
  • Single-stage compressor cycles on and off rather than modulating, reducing efficiency under partial loads
  • Price listed as $0 makes actual value assessment impossible for budget-conscious buyers

Who Should Buy

Best For

Contractors replacing damaged horizontal coils in attic-mounted systems or homeowners with tight retrofit spaces where conventional A-coils won't fit. This works well for humid climates where you need solid cooling without oversizing.

Consider Alternatives If

Anyone seeking variable-capacity cooling or quieter operation should explore two-stage alternatives, and builders installing new systems should opt for vertical A-coils offering better air distribution.

3 Ton 15 SEER Goodman Air Conditioner with Horizon
$0
Buy at HVACDirect →

Installation

Installation requires proper refrigerant line sizing with 3/8-inch liquid and 7/8-inch suction connections, both supplied with 3/4-inch insulation over 50 feet of lineset. Horizontal mounting demands excellent condensate drainage slope to prevent water backup and mold growth. The 30-pound weight is manageable for two-person attic installation, though tight spaces may require careful maneuvering. Electrical connections remain straightforward on standard residential service.

Warranty & Reliability

Coverage includes a 10-year parts and labor warranty contingent on online registration with Goodman. This registration requirement is becoming standard industry practice and protects your investment against manufacturing defects. The Evaporator Coil Warranty document provides specific coverage details on refrigerant leaks and component failure. Registration typically takes minutes online and extends your protection window significantly beyond the first year.

Specifications

SKULS38783850
Brand/ManufacturerOnline Supply
Cooling BTU34,800
RefrigerantR410A or R22
Electrical208 / 230 V. 1 Phase 60 Hz
Warranty10 Years with Online Registration
Decibel Level (dBA)73.5
Weight (in lbs)30.000000
FeatureSpec
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 Size30 amps
Min. Breaker Size18.7 amps
Tonnage5 Ton
Height24.5"
Width26"
Depth21.125"
ResourcesCHPF Installation Manual CHPF Specifications Sheet Goodman Evaporator Coil Warranty You will need Adobe® Acrobat® Reader to view PDF documents.
ConfigurationHorizontal
Liquid Line3/8"
Suction Line7/8"
StyleA-Coil
Suction Line Insulation Thickness3/4"
Length50 feet

Frequently Asked Questions

Why does this listing show both 3-ton and 5-ton ratings? +
This appears to be a specification error in the product database. The 34,800 BTU cooling capacity and title indicate 3-ton operation, but tonnage specs list 5-ton. Contact the supplier to clarify before purchase. This discrepancy could indicate wrong coil shipped or inventory confusion that affects proper system matching.
Will this horizontal coil work with my existing outdoor condensing unit? +
Compatibility depends on matching tonnage and refrigerant type with your condenser. The R410A/R22 flexibility helps, but mismatched capacities cause poor efficiency and compressor strain. Have your HVAC contractor verify the outdoor unit tonnage matches this coil's actual capacity before installation to ensure proper refrigerant charge and airflow balance.
How does 16 SEER1 compare to modern standard coils? +
16 SEER1 is competitive for horizontal retrofit applications but below newer multi-stage designs reaching 18-20 SEER. Single-stage operation limits part-load efficiency, so real-world performance depends heavily on proper installation, adequate airflow, and clean filters. The rating assumes ideal conditions rarely seen in actual residential attics with heat and duct leakage.
Is Goodman reliability acceptable compared to premium brands? +
Goodman's scroll compressor is reliable, though not premium-tier like Lennox or Carrier equipment. The brand occupies middle market with solid track records over 5-7 years but higher warranty claims after year 8. Choose based on your contractor's service reputation and parts availability in your area.
Does the 10-year warranty cover refrigerant? +
The registration-based warranty covers manufacturing defects including refrigerant leaks from coil faults. It does not cover refrigerant depletion from normal system operation or installer errors during installation and evacuation procedures.

Affiliate disclosure: IndustrialRank earns a commission on qualifying purchases at no extra cost to you. We only recommend products we have independently reviewed.