Independent Review · Updated June 2026

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

Goodman's efficient two-stage system balances performance and affordability for most homes

8.2
IndustrialRank Score
Efficiency
8.5
Reliability
7.8
Value
8.0
Installation
8.5
Warranty
8.0
4 Ton 15 SEER 96% AFUE 120,000 BTU Goodman Gas Furnace and Air Conditioner System - Horizontal
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// Bottom Line
This Goodman system makes sense for homeowners replacing old equipment or contractors serving price-conscious customers who won't sacrifice efficiency. The 96% AFUE furnace and two-stage cooling deliver solid performance in moderate climates, backed by Goodman's reputation for dependable mid-tier equipment.

Review

Goodman's TX5N4 represents the practical middle ground in residential HVAC, delivering respectable efficiency without the complexity or cost of premium systems. As a 4-ton unit rated at 15 SEER (16 SEER1) and 96% AFUE, it competes directly against thousands of installations made annually by regional contractors. This horizontal configuration targets attic and basement installations where space constraints rule out larger equipment, making it particularly valuable for retrofit scenarios where ductwork already exists.

The numbers tell a straightforward story. The 120,000 BTU furnace at 96% AFUE converts nearly every dollar of fuel into usable heat, while the 48,000 BTU cooling capacity handles four-ton loads across two stages. That variable-speed ECM blower motor caps out at 2000 CFM and adjusts throughout the day instead of cycling on-off like older designs, reducing energy waste substantially. The scroll compressor and R410A refrigerant are industry standards, meaning repair technicians everywhere carry compatible parts.

Pros & Cons

Pros

  • 96% AFUE furnace rating is well above minimum efficiency standards, reducing heating costs by 20-30% versus 80% AFUE units
  • Two-stage burner and compressor automatically adjust output to match demand, improving comfort and reducing cycling losses
  • Variable-speed ECM blower motor runs efficiently year-round, lowering electricity consumption compared to standard single-speed motors
  • PVC exhaust venting eliminates expensive masonry flue requirements and simplifies installation in tight spaces
  • ENERGY STAR certified system qualifies for utility rebates that can offset 10-15% of purchase price
  • 10-year parts warranty with online registration provides genuine peace of mind for homeowners

Cons

  • SEER1 rating of 16 lags behind modern 18+ SEER systems, meaning higher cooling costs in hot climates
  • 74 dB noise level is noticeably louder than high-end variable-capacity competitors, potentially noticeable in quiet neighborhoods
  • Horizontal configuration limits placement options, requiring basement or attic space; not suitable for ground-level closet installations
  • Two-stage design cannot modulate capacity smoothly like inverter-driven systems, resulting in slightly less consistent temperature control

Who Should Buy

Best For

Homeowners in transitional climates with moderate heating and cooling needs, particularly those upgrading from 1990s equipment. Contractors serving budget-conscious customers who prioritize reliability and efficiency without premium pricing.

Consider Alternatives If

Buyers in hot climates needing minimal cooling costs should examine 18+ SEER options, and anyone in noise-sensitive areas should audition units before purchase.

4 Ton 15 SEER 96% AFUE 120,000 BTU Goodman Gas Fur
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Installation

This system requires 208-230V single-phase power with breaker capacity between 27.7 and 45 amps, standard for most homes. PVC exhaust venting simplifies installation compared to traditional metal flues, and sweat-type refrigerant valves use 3/8-inch liquid and 7/8-inch suction lines. Horizontal mounting demands adequate clearance above ductwork, and proper airflow return must be engineered during initial design.

Warranty & Reliability

The 10-year parts warranty applies automatically upon online registration, covering defects in manufacturing for a full decade. This is competitive with Goodman's peers and covers compressor, coil, and motor components. Labor and refrigerant are not included, so budget separately for technician time if repairs are needed after the first year.

Specifications

SKUTX5N4
Brand/ManufacturerGoodman
Cooling BTU48,000
Heating BTU120,000
RefrigerantR410A
Electrical208 / 230 V. 1 Phase 60 Hz
Warranty10 Years with Online Registration
Decibel Level (dBA)74
Weight (in lbs)2.500000
FeatureSpec
AHRI Certificate Number7368842
Airflow DirectionUpflow/Horizontal
Exhaust Flue RequirementPlastic / PVC
Product FeaturesRebate Available
Furnace Efficiency / AFUE96%
Blower MotorVariable Speed - ECM
Maximum CFM2000
ConfigurationHorizontal
Energy StarYes
Burner StagesTwo
Fuel TypePropane, Natural Gas
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.
SEER1 (Efficiency)16
Condenser StagesTwo Stage
Compressor TypeScroll
Liquid Valve Size3/8"
Suction Valve Size7/8"
Max Breaker Size45 amps
Min. Breaker Size27.7 amps
Tonnage5 Ton
Valve TypeSweat
Liquid Line3/8"
Suction Line7/8"
StyleA-Coil

Frequently Asked Questions

How does 96% AFUE compare to other furnaces I've seen? +
96% AFUE ranks among the highest standard two-stage furnaces available. By comparison, 80% AFUE units waste one-fifth of fuel as exhaust heat. Over 15 years, upgrading from 80% to 96% saves approximately $2000-3000 in heating costs for a typical 4-ton home, depending on climate and natural gas prices in your region.
Will this horizontal unit fit in my attic space? +
With dimensions of 24.5 inches tall, 26 inches wide, and 21.125 inches deep, measure your attic clearance carefully. The unit weighs 2500 pounds, requiring substantial structural support and reinforced joists. Verify ductwork layout allows proper return airflow, as cramped installations reduce efficiency significantly.
What's the difference between SEER and SEER1 ratings? +
SEER1 (16) is the newer testing standard introduced in 2023, reflecting real-world conditions more accurately than the older SEER method. This unit's 15 SEER converts to approximately 16 SEER1, so don't be confused by the apparent upgrade in number. Both measure air conditioning efficiency using identical capacity outputs.
Is Goodman equipment as reliable as Carrier or Lennox? +
Goodman owns Carrier's commercial line and manufactures equipment for multiple brands. Real-world data shows comparable failure rates across the three brands within their respective price tiers. The key difference is service availability and technician familiarity, where Goodman excels due to widespread distribution through independent contractors.
Does this system qualify for tax credits or rebates? +
ENERGY STAR certification makes it eligible for state and utility rebates averaging $300-600. Federal tax credits require 95%+ AFUE for furnaces, which this unit meets. Check your local utility company website for specific incentive amounts in your area.

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