Independent Review · Updated June 2026

5 Ton 15 SEER 96% AFUE 120,000 BTU Goodman Gas Furnace and Air Conditioner System - Downflow

High-efficiency 5-ton combo system delivering 96% heating and 16 SEER2 cooling.

8.2
IndustrialRank Score
Efficiency
8.5
Reliability
7.8
Value
8.0
Installation
8.5
Warranty
8.0
5 Ton 15 SEER 96% AFUE 120,000 BTU Goodman Gas Furnace and Air Conditioner System - Downflow
Current Price
$3136
Check Price at HVACDirect → Shop Now at HVACDirect
Authorized dealer · Full manufacturer warranty
// Bottom Line
This Goodman system is ideal for homeowners replacing aging furnace and AC units who want strong efficiency without premium pricing. The 96% AFUE furnace and 16 SEER2 condenser make it a solid mid-tier choice for mixed climates where both heating and cooling matter.

Review

This Goodman 5-ton combo system pairs a gas furnace with an air conditioner condenser in a downflow configuration. At $3,136, it positions itself as a practical mid-market solution for homeowners replacing complete systems rather than upgrading individual components. The system carries Goodman's reputation for no-frills reliability without bells and whistles, making it a contractor favorite for straightforward residential replacements.

The heating side delivers 120,000 BTU through a 96% AFUE two-stage burner, ranking above standard 80-90% units and reducing winter energy costs measurably. Cooling capacity reaches 54,000 BTU with a 16 SEER2 rating and R410A refrigerant. The variable-speed ECM blower can modulate from 0 to 2000 CFM, adjusting to match demand. Performance is honest and consistent, though the single-stage compressor cannot modulate cooling capacity, meaning part-load efficiency relies entirely on the blower motor's cycling.

Pros & Cons

Pros

  • 96% AFUE furnace efficiency reduces heating costs significantly compared to 80-90% units
  • 16 SEER2 cooling rating and Energy Star certification deliver above-average AC performance
  • Variable-speed ECM blower motor adjusts airflow from 0-2000 CFM for comfort and efficiency
  • Two-stage furnace burner modulates heat output to reduce cycling and improve comfort
  • Scroll compressor in condenser is proven reliable with lower noise at 73 dB
  • 10-year warranty with online registration provides solid coverage for parts

Cons

  • Single-stage air conditioner compressor cannot modulate capacity like two-stage units, limiting part-load efficiency
  • 73 dB noise level is moderately loud for residential settings, noticeable when running
  • Downflow configuration limits placement options, requires basement or crawlspace installation

Who Should Buy

Best For

Homeowners in moderate climates needing both furnace and AC replacement who prioritize efficiency and reliability over premium features. Contractors building value-conscious packages for customers in mixed heating/cooling regions.

Consider Alternatives If

Anyone in hot climates where AC runs constantly should consider two-stage compressor units for better part-load efficiency.

5 Ton 15 SEER 96% AFUE 120,000 BTU Goodman Gas Fur
$3136
Buy at HVACDirect →

Installation

Downflow configuration requires installation in a basement or crawlspace with headroom for the 30-inch height. The system needs 115V single-phase power with 29.6 to 50-amp breaker capacity. Ductwork connections use 3/8-inch liquid and 7/8-inch suction lines with 3/4-inch insulation. PVC plastic exhaust flue works with both natural gas and propane fuel. Professional installation is strongly recommended due to refrigerant handling and electrical requirements.

Warranty & Reliability

Goodman provides 10 years of parts coverage when you register the system online. This is a respectable warranty for the price point, covering compressor, heat exchanger, and blower motor failures. Registration is straightforward and extends coverage beyond the standard five years. Read terms carefully regarding labor costs, which typically fall on the homeowner.

Specifications

SKULS38783850
Brand/ManufacturerOnline Supply
Cooling BTU54,000
Heating BTU120,000
RefrigerantR410A
Electrical115 V. 1 Phase 60 Hz
Warranty10 Years with Online Registration
Decibel Level (dBA)73
Weight (in lbs)30.000000
FeatureSpec
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
Tonnage5 Ton
Height30"
Width24.5"
Depth21"
ResourcesCAPT Installation Manual CAPT Specifications Sheet Goodman Evaporator Coil Warranty 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.
AHRI Certificate Number7368845
Airflow DirectionDownflow/Horizontal
Exhaust Flue RequirementPlastic / PVC
Product FeaturesRebate Available
Furnace Efficiency / AFUE96%
Blower MotorVariable Speed - ECM
Maximum CFM2000
ConfigurationUpflow / Downflow
Burner StagesTwo
Fuel TypePropane, Natural Gas
Liquid Line3/8"
Suction Line7/8"
StyleA-Coil
Suction Line Insulation Thickness3/4"
Length50 feet

Frequently Asked Questions

What does 16 SEER2 rating actually mean for my cooling costs? +
SEER2 measures seasonal efficiency, so a 16 rating is 20% more efficient than a baseline 13.3 unit. On a typical 5-ton system, expect $15 to $25 monthly savings during summer months compared to older systems. Exact savings depend on climate, thermostat settings, and ductwork quality.
Can this system work with my current ductwork? +
The 2000 CFM maximum airflow is moderate, so it'll work with most existing residential ducts. However, you should have a professional perform a Manual D ductwork evaluation. Undersized ducts can reduce efficiency and comfort significantly, negating the system's benefits.
Is 73 dB noise level a problem? +
At 73 dB, the condenser is comparable to heavy traffic or a loud conversation. It's noticeable but not unusual for residential AC units. Two-stage compressors run quieter at part load. If noise concerns you, request a noise-rated condenser alternative.
How does this compare to a 16 SEER2 variable-capacity system? +
Variable-capacity AC units cost 25-40% more but deliver better part-load efficiency and quieter operation. This single-stage unit cycles more, raising noise and reducing comfort during moderate temperatures. Choose variable-capacity if budget allows and comfort is priority.
Does the 10-year warranty cover installation labor? +
No, the warranty covers parts only. Labor for replacements under warranty falls on you unless your installer offers separate labor warranty. Always clarify this with your contractor before purchase.

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