Independent Review · Updated June 2026

4 Ton 14 SEER 80% AFUE 100,000 BTU Goodman Gas Furnace and Air Conditioner System - Upflow

Solid mid-tier gas furnace and AC combo for budget-conscious contractors and homeowners

7.8
IndustrialRank Score
Efficiency
7.5
Reliability
8.0
Value
8.2
Installation
8.3
Warranty
7.9
4 Ton 14 SEER 80% AFUE 100,000 BTU Goodman Gas Furnace and Air Conditioner System - Upflow
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// Bottom Line
This Goodman system makes sense for contractors installing replacement equipment in cost-sensitive markets or homeowners upgrading older units without premium efficiency requirements. The 80% AFUE and 14 SEER ratings deliver respectable performance without the price premium of high-efficiency models, making it ideal for rental properties and secondary residences.

Review

The Goodman 4-ton gas furnace and air conditioner system sits squarely in the contractor-grade segment, offering reliable performance without premium pricing. This unit pairs a two-stage gas furnace producing 100,000 BTU with a 4-ton air conditioning component rated at 48,000 BTU and 14 SEER cooling efficiency. The upflow configuration works for standard installations, and the 10-year warranty provides reasonable coverage. Goodman maintains strong market presence through HVAC wholesalers, making parts accessible across most service areas.

Performance-wise, the 80% AFUE heating efficiency and 14 SEER cooling rating represent solid mid-range capability. The high-efficiency multi-speed blower motor and two-stage burner work together to minimize temperature swings, though the single-stage condenser means the cooling system lacks variable-capacity benefits. At 74 dB, noise levels are acceptable for residential settings. The scroll compressor uses standard R410A refrigerant with 3/8-inch and 7/8-inch line sizing, supporting up to 2000 CFM airflow through your ductwork.

Pros & Cons

Pros

  • Two-stage burner with high-efficiency multi-speed blower motor reduces short cycling and improves comfort consistency
  • 14 SEER cooling efficiency and 100,000 BTU heating capacity handle most residential applications effectively
  • Compact 30x21x21 inch footprint fits tight closets and utility spaces where larger units won't fit
  • 10-year warranty with online registration provides solid coverage without requiring contractor involvement
  • Scroll compressor design is proven, widely serviced, and uses standard R410A refrigerant

Cons

  • 80% AFUE is below modern standards, meaning higher heating bills compared to 95%+ AFUE systems over the unit's lifetime
  • Not Energy Star certified, which disqualifies this system from utility rebates and tax credits available to higher-efficiency models
  • Single-stage condenser limits cooling modulation, potentially cycling on and off more frequently in mild weather

Who Should Buy

Best For

Contractors replacing budget equipment in rental portfolios or commercial applications will appreciate the straightforward installation and reliable mid-range performance. Homeowners in moderate climates with reasonable heating seasons can accept the 80% efficiency trade-off in exchange for lower upfront costs and strong component availability.

Consider Alternatives If

Energy-conscious homeowners in cold climates should skip this unit and invest in 95% AFUE furnaces that pay back through utility savings within 5-7 years.

4 Ton 14 SEER 80% AFUE 100,000 BTU Goodman Gas Fur
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Installation

Installation requires 208/230V single-phase power with 26.4 to 45-amp breaker capacity, standard for most homes. The unit needs metal exhaust flue for furnace venting and proper refrigerant line routing. At 30 pounds, handling is straightforward. The compact 30x21x21 inch dimensions fit tight utility spaces. Technicians should reference the included CAPT installation manual, though Goodman systems follow conventional hookup procedures familiar to most contractors.

Warranty & Reliability

The 10-year parts warranty requires online registration and covers component failures under normal use. This covers the compressor, heat exchanger, and major assemblies but excludes regular maintenance items like filters and blower motors under some conditions. Registration is straightforward and typically completed during or immediately after installation, providing peace of mind without contractor authorization requirements.

Specifications

SKULS38783830
Brand/ManufacturerOnline Supply
Cooling BTU48,000
Heating BTU100,000
RefrigerantR410A
Electrical208 / 230 V. 1 Phase 60 Hz
Warranty10 Years with Online Registration
Decibel Level (dBA)74
Weight (in lbs)30.000000
FeatureSpec
Airflow DirectionUpflow/Horizontal
Exhaust Flue RequirementMetal
Furnace Efficiency / AFUE80%
Blower MotorHigh Efficiency Multi-Speed
Maximum CFM2000
ConfigurationUpflow / Downflow
Burner StagesTwo
Fuel TypeGas
Height30"
Width21"
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.
Energy StarNo
SEER1 (Efficiency)14
Condenser StagesSingle Stage
Compressor TypeScroll
Liquid Valve Size3/8"
Suction Valve Size7/8"
Max Breaker Size45 amps
Min. Breaker Size26.4 amps
Tonnage5 Ton
Liquid Line3/8"
Suction Line7/8"
StyleA-Coil
Suction Line Insulation Thickness3/8"
Length30 feet

Frequently Asked Questions

How does 80% AFUE compare to other furnace options? +
80% AFUE means 20 cents of every heating dollar goes up the flue as waste. Modern 95% AFUE systems waste only 5 cents per dollar. Over 15 years, an 80% system costs $2,000-$3,500 more in fuel versus 95% units in cold climates, though upfront cost is $1,500-$2,000 lower here.
Can this unit fit in my existing ductwork? +
The 2000 CFM maximum airflow rating fits standard residential ductwork designed for 4-ton systems. Check your existing furnace CFM rating. If your old system was also 4-ton, this replacement should work without duct modifications. Undersized ducts will restrict airflow and reduce efficiency.
Is 14 SEER adequate for my cooling needs? +
14 SEER provides good cooling for most climates without premium efficiency pricing. In hot regions with long cooling seasons, 16+ SEER systems save more on energy. For moderate climates or part-time cooling use, 14 SEER balances performance and cost effectively, though it lacks variable-capacity features of higher-tier units.
Why isn't this system Energy Star certified? +
Energy Star requires minimum 15 SEER cooling and 95% AFUE heating. This unit meets neither threshold, disqualifying it from federal rebates and many state incentives. However, absence of certification doesn't indicate poor quality, just that efficiency doesn't reach premium-level thresholds.
How long does the warranty actually last after registration? +
The 10-year warranty runs from installation date with online registration completed within 30 days. Coverage extends to parts only, not labor. Most components remain under warranty, though some exclusions apply. Check your registration confirmation for specific coverage details.

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