4 Ton 14 SEER 80% AFUE 120,000 BTU Goodman Gas Furnace and Air Conditioner System - Upflow Review 2026

// Bottom Line

This 4-ton Goodman system excels for homeowners in moderate climates seeking balanced heating and cooling without premium pricing. The 14 SEER rating delivers solid summer efficiency, while the dual-stage furnace handles variable winter loads intelligently, making it ideal for transitional regions like the Mid-Atlantic or Upper South.

Review

The Goodman 4-ton combo system represents a practical middle-ground choice for homeowners balancing performance and budget. With 48,000 BTU cooling capacity and 120,000 BTU heating output, this unit tackles moderate residential loads across diverse climates. Online Supply positions this as a straightforward replacement option, and its specifications align with homes averaging 1,800 to 2,400 square feet. The upflow A-coil configuration suits most basement and attic installations, while the multi-speed blower adapts to varied ductwork.

Cooling efficiency stands at 14 SEER, which outperforms minimum federal standards and translates to approximately 8% lower AC operating costs versus 13 SEER units. The 80% AFUE furnace rate is solid for gas equipment, though not premium-tier. Dual-stage burners intelligently reduce runtime during partial-load heating, improving comfort and lowering utility spikes. The scroll compressor operates at 74 dBA, quieter than many competitors. Two-stage design means the system runs part-capacity most of the time, reserving full power for peak demand.

Pros & Cons

Pros

14 SEER cooling efficiency exceeds baseline 13 SEER standards by meaningful margin
Dual-stage burner with 120,000 BTU output allows proportional heating, reducing cycling and improving comfort
Multi-speed blower motor optimizes airflow across variable load conditions and ductwork designs
Two-stage compressor and scroll design deliver reliable, quiet operation at 74 dBA
10-year warranty with online registration covers parts and labor comprehensively

Cons

80% AFUE is respectable but not leading-edge, high-efficiency models reach 95%+ AFUE
Single-stage cooling cannot modulate capacity, limiting efficiency in mild-weather months
R410A and R22 refrigerant compatibility creates servicing ambiguity for technicians
Not ENERGY STAR certified, missing federal rebate eligibility in some jurisdictions

Who Should Buy

Best For

Homeowners in transitional climates with balanced heating and cooling demands seeking reliable equipment without premium costs. Contractors installing replacement systems where existing ductwork supports 2000 CFM airflow and upflow/horizontal configuration fits the home layout.

Consider Alternatives If

Buyers in extreme-climate regions needing high-efficiency heating should explore 95% AFUE furnaces. Northern homes relying heavily on winter heating will see slower ROI versus premium efficiency options.

4 Ton 14 SEER 80% AFUE 120,000 BTU Goodman Gas Fur

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Installation

This system requires standard HVAC installation practices. The upflow A-coil design fits most basement and attic placements. Electrical demand runs between 26.4 and 45 amps at 120V single-phase, compatible with most residential panels. Metal exhaust flue is mandatory for the furnace. Refrigerant line sizing uses 3/8-inch liquid and 7/8-inch suction lines with 3/8-inch insulation, standard for 4-ton equipment. Total installed cost varies by regional labor rates and ductwork compatibility.

Warranty & Reliability

Goodman backs this system with a 10-year parts and labor warranty upon online registration. This coverage is industry-standard and protects against compressor failure, heat exchanger defects, and component malfunction. Registration is straightforward and typically completed during commissioning. Coverage applies to original homeowners in most jurisdictions. Non-registered units revert to 5-year parts-only coverage, making registration essential for full protection.

Specifications

SKU	LS38783830
Brand/Manufacturer	Online Supply
Cooling BTU	48,000
Heating BTU	120,000
Refrigerant	R410A or R22
Electrical	120 V. 1 Phase 60 Hz
Warranty	10 Years with Online Registration
Decibel Level (dBA)	74
Weight (in lbs)	30.000000
Feature	Spec
Energy Star	No
SEER1 (Efficiency)	14
Condenser Stages	Single Stage
Compressor Type	Scroll
Liquid Valve Size	3/8"
Suction Valve Size	7/8"
Max Breaker Size	45 amps
Min. Breaker Size	26.4 amps
Tonnage	5 Ton
Height	30"
Width	24.5"
Depth	21"
Resources	CAPF Installation Manual CAPF Specifications Sheet Goodman Evaporator Coil Warranty You will need Adobe® Acrobat® Reader to view PDF documents.
Safety Information	PROPOSITION 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.
Airflow Direction	Upflow/Horizontal
Exhaust Flue Requirement	Metal
Furnace Efficiency / AFUE	80%
Blower Motor	Multi-Speed
Maximum CFM	2000
Configuration	Upflow / Downflow
Burner Stages	Two
Fuel Type	Gas
Liquid Line	3/8"
Suction Line	7/8"
Style	A-Coil
Suction Line Insulation Thickness	3/8"
Length	30 feet

Frequently Asked Questions

Does this 14 SEER system qualify for federal tax credits or ENERGY STAR rebates? +

No, the unit is not ENERGY STAR certified. While 14 SEER exceeds baseline standards, federal rebates typically require ENERGY STAR designation. Check local utility rebate programs, which often have looser criteria and may offer $300 to $500 incentives for systems meeting minimum efficiency thresholds.

Can this upflow furnace be installed in a horizontal attic configuration? +

Yes, the unit supports both upflow and horizontal/downflow operation. However, horizontal installation requires proper return ductwork design to prevent condensation backup in the flue. Have an HVAC technician assess your attic framing and ductwork layout before committing to horizontal placement.

What does the dual-stage heating feature actually accomplish? +

The two-stage burner runs at 50% capacity during mild heating demand, reducing cycling, noise, and draft loss up the flue. Full 120,000 BTU output engages only during cold snaps. This improves humidity control and lowers heating costs during shoulder seasons like fall and spring.

How does this Goodman unit compare to Lennox or Carrier equivalents? +

Goodman competes on reliability and value rather than advanced features. Lennox and Carrier often offer variable-capacity cooling or modulating gas valves at higher price points. For straightforward replacement in budget-conscious households, this Goodman delivers competitive performance with proven durability.

Is online registration required to activate the 10-year warranty? +

Yes, online registration is mandatory for the full 10-year term. Without registration, coverage drops to 5 years on parts only. Registration typically takes 10 minutes and should be completed immediately after installation to protect your investment.

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