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
8.5
Warranty
7.8
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 works well for homeowners replacing aging equipment who prioritize upfront affordability over cutting-edge efficiency. The 80% AFUE furnace and 14 SEER air conditioner deliver respectable performance for moderate climates, making it ideal for rental properties and secondary residences where efficiency premiums aren't justified.

Review

Goodman's 4-ton gas furnace and air conditioner system targets the middle ground between budget and performance. The 100,000 BTU furnace pairs with a 48,000 BTU cooling capacity, delivering adequate comfort for medium-sized homes in most climates. Upflow/horizontal configuration suits standard residential installations, and the equipment is widely available through major HVAC distributors. This system competes directly with other mid-tier combos from Lennox, Rheem, and Bryant at similar price points.

The 80% AFUE rating means roughly 80 cents of every heating dollar converts to home warmth, with 20 cents lost through the flue. The two-stage burner helps offset this by modulating heat output, reducing short-cycling and improving temperature consistency. Cooling delivers 14 SEER efficiency with R410A or R22 refrigerant compatibility. The high-efficiency multi-speed blower motor at 2,000 CFM maximum and scroll compressor design are straightforward, proven technology that contractors can service without specialized training.

Pros & Cons

Pros

  • High efficiency multi-speed blower motor reduces energy waste during partial load operation
  • Two-stage burner allows furnace to run at lower capacity in mild weather, improving comfort and efficiency
  • 14 SEER cooling rating meets modern efficiency standards for most climate zones
  • Compact footprint at 30 x 21 x 21 inches fits tight utility closets and attics easily
  • 10-year warranty with online registration provides solid peace of mind on parts

Cons

  • 80% AFUE is below current high-efficiency standards, meaning higher heating costs than 95% AFUE units
  • Not ENERGY STAR certified, limiting eligibility for utility rebates in many regions
  • Single-stage condenser limits cooling efficiency compared to two-stage competitors at similar price points
  • 74 dB noise level is noticeably louder than premium systems during operation

Who Should Buy

Best For

Homeowners in moderate climates replacing 15+ year old equipment who want reliable performance without premium pricing. Contractors installing systems in rental properties or cost-conscious markets will find this unit delivers solid value and straightforward serviceability.

Consider Alternatives If

Anyone in cold northern climates should consider 90%+ AFUE models. Homeowners prioritizing quiet operation or maximum efficiency rebates should look at ENERGY STAR alternatives.

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

This unit requires 208/230V single-phase 60 Hz power with breaker capacity between 26.4 and 45 amps. Upflow configuration suits standard indoor placement with metal exhaust flue requirements. The 30-inch height fits most mechanical rooms, though technicians should verify clearance for service access. Pre-charged refrigerant lines come in 3/8-inch and 7/8-inch sizes with 30-foot maximum run length and 3/8-inch suction line insulation.

Warranty & Reliability

Goodman backs this system with a 10-year parts warranty when registered online. Coverage applies to the furnace heat exchanger, compressor, and other major components. Online registration is straightforward and essential to activate the full term. This warranty aligns with industry standards, though some competitors offer similar coverage on entry-level equipment without registration requirements.

Specifications

SKULS38783830
Brand/ManufacturerOnline Supply
Cooling BTU48,000
Heating BTU100,000
RefrigerantR410A or R22
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"
ResourcesCAPF Installation Manual CAPF 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

Will this system qualify for energy efficiency tax credits or rebates? +
Unlikely. The 80% AFUE furnace and lack of ENERGY STAR certification disqualify it from most federal and state incentive programs. Check local utility companies for rare rebates on standard-efficiency equipment, but expect minimal incentive opportunities compared to 95% AFUE systems.
Can this furnace use my existing ductwork from an older unit? +
Probably, but have a contractor verify duct sizing. The 2,000 CFM maximum airflow requires ductwork designed for similar capacity. Undersized ducts reduce efficiency and comfort. Get a Manual J calculation to confirm existing ducts match the 4-ton load properly.
How does 14 SEER cooling efficiency compare to newer standards? +
14 SEER meets minimum current standards and qualifies for most installs. However, 16-18 SEER units now command similar pricing in many markets. If cooling costs concern you, compare total system cost including installation rather than cooling efficiency alone.
Is Goodman equipment as reliable as Carrier or Lennox? +
Goodman owns multiple brands and uses proven compressor and blower technology. Reliability tracks closely with installation quality and maintenance. This mid-tier equipment performs similarly to equivalent Lennox and Rheem models when properly installed and serviced regularly.
What does the 10-year warranty actually cover? +
Parts only, not labor. Covers compressor, heat exchanger, and major components when registered. Coil warranty requires proper maintenance. Read the detailed warranty document before purchase to understand exclusions and registration requirements.

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