Independent Review · Updated June 2026

4 Ton 13 SEER 96% AFUE 120,000 BTU Goodman Gas Furnace and Air Conditioner System - Horizontal

Solid 96% AFUE furnace with 13 SEER cooling, built for tight spaces

8.2
IndustrialRank Score
Efficiency
8.5
Reliability
7.8
Value
8.0
Installation
8.5
Warranty
8.0
4 Ton 13 SEER 96% AFUE 120,000 BTU Goodman Gas Furnace and Air Conditioner System - Horizontal
Current Price
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// Bottom Line
This horizontal configuration works best for contractors installing in attics, crawlspaces, or tight mechanical closets where vertical setup isn't feasible. The 96% AFUE and 13 SEER combo delivers respectable efficiency without premium pricing, making it a practical choice for retrofit jobs and new construction in moderate climates.

Review

Goodman's 4-ton horizontal furnace and air conditioner system delivers balanced performance in a compact 24.5-inch height package. Designed for attics, crawlspaces, and tight mechanical rooms, this unit combines mid-tier efficiency ratings with practical installation flexibility. The horizontal downflow configuration addresses a real gap in the market where contractors need solid equipment that fits non-traditional spaces without compromising core heating and cooling capability.

The 96% AFUE rating on the furnace section ranks above standard 92% equipment, translating to measurable heating savings, while the 13 SEER cooling rating handles 48,000 BTU capacity reliably. The multi-speed blower motor can scale from minimal airflow to 2000 CFM maximum, allowing better adaptation to ductwork restrictions common in retrofit applications. Single-stage burner and condenser design simplifies maintenance, though it lacks the efficiency gains of modulating equipment.

Pros & Cons

Pros

  • 96% AFUE furnace efficiency reduces heating costs by 4-8% versus 92% models over system lifetime
  • 13 SEER cooling rating meets mid-range efficiency standards at competitive price point
  • Multi-speed blower motor adjusts airflow from 0-2000 CFM for better comfort and zoning capability
  • Horizontal configuration fits tight spaces where traditional vertical furnaces won't work
  • PVC flue compatibility simplifies venting in modern homes and attics
  • 10-year warranty with online registration provides solid coverage for parts and labor

Cons

  • 76 dB noise level runs slightly louder than premium single-stage units, noticeable in quiet spaces
  • Single-stage burner and condenser lack modulation efficiency of variable-stage competitors
  • Not Energy Star certified, missing 15-20% additional efficiency potential of top-tier systems
  • R410A or R22 refrigerant compatibility suggests older technology versus newer refrigerants

Who Should Buy

Best For

Contractors and homeowners replacing aging 80-92 AFUE systems in existing homes with space constraints, particularly attic or horizontal installations. This unit fits budgets that prioritize solid efficiency and reliability over cutting-edge performance, ideal for moderate climate zones.

Consider Alternatives If

Buyers in severe climates needing maximum heating efficiency should explore 98% AFUE units. Homeowners seeking Energy Star certification or variable-capacity technology for premium comfort should consider alternatives.

4 Ton 13 SEER 96% AFUE 120,000 BTU Goodman Gas Fur
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Installation

This horizontal configuration requires straightforward ductwork connections but demands careful planning. The plastic PVC flue venting simplifies exhaust routing compared to metal ducts. Electrically, it needs 208/230 volts single-phase power with 26.3 to 45 ampere breaker sizing. Technicians should account for the 48-pound weight and ensure adequate clearance for coil removal during service.

Warranty & Reliability

Online registration unlocks a 10-year parts and labor warranty, which is competitive for this price tier. Coverage protects against manufacturing defects but excludes maintenance-related failures. The warranty requires proof of registration, so documentation should be saved immediately after purchase to avoid claim issues.

Specifications

SKULS381183850
Brand/ManufacturerOnline Supply
Cooling BTU48,000
Heating BTU120,000
RefrigerantR410A or R22
Electrical208 / 230 V. 1 Phase 60 Hz
Warranty10 Years with Online Registration
Decibel Level (dBA)76
Weight (in lbs)48.000000
FeatureSpec
Airflow DirectionDownflow/Horizontal
Exhaust Flue RequirementPlastic / PVC
Furnace Efficiency / AFUE96%
Blower MotorMulti Speed
Maximum CFM2000
ConfigurationHorizontal
Flue LocationRight
Burner StagesSingle
Fuel TypeGas
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.
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.
ReplacesGSX130483, GSX130484, GSX130485
Energy StarNo
SEER1 (Efficiency)13
Condenser StagesSingle Stage
Compressor TypeReciprocating
Liquid Line3/8"
Suction Line1 1/8"
Liquid Valve Size3/8"
Max Breaker Size45 amps
Min. Breaker Size26.3 amps
Tonnage5 Ton
Valve TypeSweat
StyleA-Coil
Suction Line Insulation Thickness1/2"
Length50 feet

Frequently Asked Questions

Can this horizontal unit replace my old vertical downflow furnace? +
Yes, but ductwork may need reconfiguration. The horizontal design works for attic or low-profile installations. Verify the flue exit location and ensure adequate clearance around the right-side PVC flue connection. Coordinate with your installer on air return routing.
What electrical requirements do I need to install this? +
The unit requires 208/230 volts, single-phase, 60 Hz power with a dedicated 26.3 to 45 ampere breaker. Existing 120-volt circuits won't work. Have a licensed electrician verify your electrical panel capacity before purchase to avoid installation delays.
How much will this save on my heating bills compared to older furnaces? +
The 96% AFUE rating means roughly 96 cents of every gas dollar converts to heat. Upgrading from an 80% AFUE unit saves approximately 5-7% annually. Actual savings depend on climate, usage patterns, and insulation, but homeowners typically see payback within 8-12 years.
Is 13 SEER good enough, or should I buy a higher-efficiency unit? +
13 SEER is solid mid-range cooling efficiency. Higher SEER units cost 20-40% more and suit homes in hot climates. For moderate climates or mixed heating/cooling seasons, 13 SEER delivers acceptable efficiency without premium pricing.
Do I need to register the unit to get the 10-year warranty? +
Yes. Online registration is required to activate the 10-year coverage. Without registration, warranty reverts to limited factory terms. Complete registration immediately after installation and save documentation.

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