3 Ton 13 SEER 96% AFUE 100,000 BTU Goodman Gas Furnace and Air Conditioner System - Upflow Review 2026

// Bottom Line

This Goodman system works best for homeowners replacing older split systems who want dependable heating and cooling without premium features. The 96% AFUE furnace and 13 SEER air conditioner deliver solid efficiency in mid-range applications, particularly in climates with moderate cooling demands.

Review

The Goodman 3-ton gas furnace and air conditioner system represents a straightforward, no-frills approach to residential climate control. As a single-stage system with reciprocating compressor technology, it targets contractors and homeowners who value reliability and simplicity over cutting-edge features. This upflow configuration fits standard attic or closet installations, making it a practical replacement for systems using Goodman models GSX130362, GSX130363, and GSX130365.

Performance metrics show a 96% AFUE furnace producing 100,000 BTU heating output paired with a 36,000 BTU, 13 SEER air conditioner. The multi-speed blower reaches 2,000 CFM maximum airflow, enabling reasonable comfort in most residential applications. At 74 dB, the unit operates with moderate noise levels typical of single-stage systems. Electrical requirements are modest: 115V single-phase at 19.1 to 30 amps, standard for most residential installations.

Pros & Cons

Pros

96% AFUE gas furnace means lower heating bills compared to 80-90% efficiency units, saving $200-400 annually in many climates
13 SEER air conditioner provides respectable cooling efficiency at mid-tier pricing, suitable for moderate climates
Multi-speed blower motor allows better temperature control and quieter operation than single-speed alternatives
10-year parts warranty with online registration provides reasonable coverage for the investment
PVC exhaust capability reduces installation costs compared to masonry chimney requirements

Cons

Single-stage compressor and burner lack modulation, meaning less precise comfort control and higher operating noise at 74 dB
13 SEER is baseline efficiency today, not competitive with 16-18 SEER systems if energy savings are a priority
Not Energy Star certified, which eliminates rebate eligibility in many utility programs

Who Should Buy

Best For

Budget-conscious homeowners and contractors seeking reliable mid-range equipment for residential replacements. This system makes sense for those in moderate climates who want dependable heating and cooling without paying premium prices for variable-capacity technology.

Consider Alternatives If

Homeowners prioritizing maximum energy efficiency rebates, those in extreme climates needing staged capacity, or buyers seeking the quietest operation should explore 16+ SEER and two-stage alternatives.

3 Ton 13 SEER 96% AFUE 100,000 BTU Goodman Gas Fur

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Installation

This upflow system requires standard ductwork connections with 3/8-inch liquid and 7/8-inch suction lines. The A-coil configuration integrates with existing furnaces, and PVC plastic exhaust requirements simplify venting installation. Dimensions measure 34.5 inches high by 21 inches wide by 28.75 inches deep, fitting typical utility closets. Sweat valve connections demand basic soldering skills or licensed technician involvement.

Warranty & Reliability

The 10-year parts warranty applies with online registration, covering compressor and major components. This is industry-standard protection for this price tier, though it does not include labor costs. Registration is mandatory to activate coverage, so homeowners must complete paperwork promptly after installation.

Specifications

SKU	LS38783830
Brand/Manufacturer	Online Supply
Cooling BTU	36,000
Heating BTU	100,000
Refrigerant	R410A or R22
Electrical	115 V. 1 Phase 60 Hz
Warranty	10 Years with Online Registration
Decibel Level (dBA)	74
Weight (in lbs)	30.000000
Feature	Spec
Replaces	GSX130362, GSX130363, GSX130365
Energy Star	No
SEER1 (Efficiency)	13
Condenser Stages	Single Stage
Compressor Type	Reciprocating
Liquid Valve Size	3/8"
Suction Valve Size	3/4"
Max Breaker Size	30 amps
Min. Breaker Size	19.1 amps
Tonnage	3 Ton
Valve Type	Sweat
Height	34.5"
Width	21"
Depth	28.75"
Resources	Goodman Brochure Goodman Installation Instructions Goodman Parts Manual Goodman Service Manual Goodman Specifications Goodman Technical Information Goodman User Information Goodman Warranty You will need AdobeÂ® AcrobatÂ® 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.
Configuration	Upflow/Horizontal
Liquid Line	3/8"
Suction Line	7/8"
Style	A-Coil
Airflow Direction	Upflow/Horizontal
Exhaust Flue Requirement	Plastic / PVC
Furnace Efficiency / AFUE	96%
Blower Motor	Multi Speed
Maximum CFM	2000
Flue Location	Right
Burner Stages	Single
Fuel Type	Gas
Suction Line Insulation Thickness	3/8"
Length	30 feet

Frequently Asked Questions

What does 96% AFUE actually mean for my heating bills? +

AFUE measures furnace efficiency converting fuel to heat. At 96%, this unit loses only 4% of energy as waste compared to 80-85% AFUE models. In heating climates, you'll save approximately $200 to $400 annually versus older furnaces, depending on local gas rates and heating degree days.

Can this system use both R410A and R22 refrigerant? +

Yes, this unit is certified for both R410A and R22, offering flexibility. R410A is standard in new installations and requires specific oils and components. R22 is used primarily in retrofit applications. Your installer will determine compatibility based on existing system components and local regulations.

How does 13 SEER compare to newer air conditioners? +

13 SEER is mid-range efficiency. Current standards start at 14 SEER, with premium units reaching 18-20 SEER. The difference means 16 SEER units cool at roughly 23% better efficiency, resulting in lower summer electricity costs. Choose 13 SEER if initial cost matters more than long-term savings.

Is single-stage performance adequate for typical homes? +

Single-stage operation works well in moderate climates with consistent cooling and heating needs. The compressor and burner run at full capacity or off, without intermediate modulation. Two-stage systems provide finer temperature control and quieter operation, but cost significantly more. Single-stage is reliable and proven for standard residential use.

What's included in the 10-year warranty? +

Parts coverage includes the compressor, coil, and major components for ten years with registration. Labor and service calls are not covered. You pay for technician visits and repairs. Warranty is void if the system is not installed by a licensed professional.

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