4 Ton 13 SEER 80% AFUE 100,000 BTU Goodman Gas Furnace and Air Conditioner System - Upflow Review 2026

// Bottom Line

This Goodman system works best for homeowners replacing aging equipment who want reliable heating and cooling without premium pricing. The 13 SEER cooling and 80% AFUE heating strike a practical balance for moderate climates where neither extreme efficiency nor budget-basement specs make sense.

Review

The Goodman 4-ton gas furnace and air conditioner system represents the practical middle of the residential HVAC market. Manufactured by a brand with decades of OEM supply experience, this upflow configuration delivers honest heating and cooling without attempting premium positioning. It slots into the sweet spot for homeowners replacing worn equipment who understand that middle-tier equipment can run trouble-free for 15-20 years when properly maintained and correctly sized.

Performance metrics are straightforward and transparent. The furnace generates 100,000 BTU across two burner stages, hitting 80% AFUE efficiency. On the cooling side, the 4-ton (48,000 BTU) capacity pairs with a 13 SEER rating, pulling 2000 CFM maximum through its high-efficiency multi-speed blower. These numbers cluster around industry averages rather than cutting edge, which means predictable performance without exotic components that might complicate servicing.

Pros & Cons

Pros

13 SEER cooling efficiency qualifies for some utility rebates while keeping equipment costs reasonable
100,000 BTU heating capacity with two-stage burner allows modulation for comfort and lower operating costs
High-efficiency multi-speed blower motor, 2000 CFM maximum, reduces short cycling and improves air distribution
10-year warranty with online registration covers parts and compressor, standard protection for this tier
Compact 30x21x21 inch footprint fits upflow/horizontal applications in tight utility closets or attics
Reciprocating compressor uses R410A refrigerant, established performance track record in residential systems

Cons

80% AFUE is entry-level for furnaces, older homes lose 20% of heating energy up the flue compared to 95% models
Not Energy Star certified, meaning higher operating costs over 15-20 year lifespan versus qualified units
Single-stage condenser cycles on/off fully rather than modulating, less precise temperature control than two-stage units
76 dB noise level runs louder than quieter premium models, noticeable in homes with nearby bedrooms
Requires metal exhaust flue, not compatible with homes using PVC condensing configurations

Who Should Buy

Best For

Homeowners in non-extreme climates (not Minnesota winters or Arizona summers) replacing 15-20 year old systems who value reliability over premium efficiency. Contractors building new homes where first-cost matters and owners plan moderate tenure.

Consider Alternatives If

Energy-conscious homeowners in high-heating climates should look at 90%+ AFUE furnaces, and those in hot climates should consider 16+ SEER units; premium buyers wanting whisper-quiet operation or smart modulation should upgrade to higher-tier brands.

4 Ton 13 SEER 80% AFUE 100,000 BTU Goodman Gas Fur

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Installation

Installation demands standard sheet metal for exhaust flue and requires 208/230V single-phase 60Hz power with 26.3-45 amp breaker sizing. The upflow/horizontal configuration fits common closet and attic spaces with its compact 30x21x21 inch footprint. Suction and liquid lines measure 1 1/8 inch and 3/8 inch respectively with sweat-type valves, supporting standard field practices.

Warranty & Reliability

Goodman includes a 10-year warranty on parts and compressor when registered online. This coverage matches competitor offerings at this price point and covers defects in materials and workmanship. Registration is straightforward and protects against unexpected failures during the critical first decade, though coverage ends at year 10 regardless of equipment lifespan.

Specifications

SKU	LS381183850
Brand/Manufacturer	Online Supply
Cooling BTU	48,000
Heating BTU	100,000
Refrigerant	R410A
Electrical	208 / 230 V. 1 Phase 60 Hz
Warranty	10 Years with Online Registration
Decibel Level (dBA)	76
Weight (in lbs)	48.000000
Feature	Spec
Airflow Direction	Upflow/Horizontal
Exhaust Flue Requirement	Metal
Furnace Efficiency / AFUE	80%
Blower Motor	High Efficiency Multi-Speed
Maximum CFM	2000
Configuration	Upflow / Downflow
Burner Stages	Two
Fuel Type	Gas
Height	30"
Width	21"
Depth	21"
Resources	CAPT Installation Manual CAPT 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.
Replaces	GSX130483, GSX130484, GSX130485
Energy Star	No
SEER1 (Efficiency)	13
Condenser Stages	Single Stage
Compressor Type	Reciprocating
Liquid Line	3/8"
Suction Line	1 1/8"
Liquid Valve Size	3/8"
Max Breaker Size	45 amps
Min. Breaker Size	26.3 amps
Tonnage	5 Ton
Valve Type	Sweat
Style	A-Coil
Suction Line Insulation Thickness	1/2"
Length	50 feet

Frequently Asked Questions

Is 13 SEER good enough, or should I spend more for 16+ SEER? +

13 SEER saves 15-20% annual cooling energy versus 10 SEER units and qualifies for some rebates. Jumping to 16+ SEER costs roughly 25-40% more upfront. For moderate climates, 13 SEER pays back in 8-10 years through lower bills. In extreme heat, higher SEER justifies the premium. Calculate your cooling degree days to decide.

Can this system work in my downflow attic installation? +

Yes, this unit supports both upflow and downflow configuration, though you'll need proper return ductwork design. The compact 30-inch height fits most attic joists. Ensure your contractor positions it correctly and seals all cabinet gaps to prevent attic air infiltration, which kills efficiency.

How does 80% AFUE compare to my current furnace efficiency? +

If your furnace is 15+ years old, it likely runs 60-75% AFUE, so upgrading to 80% saves 5-15% annual heating costs. However, newer 90-95% AFUE units recoup their premium in harsh climates within 7-10 years. For moderate winters, 80% represents solid value without premium pricing.

Is Goodman a reliable brand compared to Carrier or Lennox? +

Goodman builds equipment for most major HVAC brands as OEM supplier, meaning identical internal components. Reliability depends on installation quality and maintenance, not brand mystique. This system has reciprocating compressors with proven longevity, though premium brands add refinements that justify cost primarily through quieter operation and better modulation.

What does the 10-year warranty actually cover? +

Parts and compressor defects are covered for 10 years with registration. Labor is typically homeowner responsibility or covered by your installing contractor's service agreement. This warranty doesn't cover damage from improper installation, refrigerant leaks from external causes, or normal wear. Verify coverage details with your dealer before purchase.

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