3 Ton 13 SEER 96% AFUE 80,000 BTU Goodman Gas Furnace and Air Conditioner System - Horizontal Review 2026

// Bottom Line

This Goodman system works best for homeowners upgrading older equipment who prioritize heating efficiency and want proven reliability without premium pricing. The 96% AFUE furnace and 13 SEER condenser combination delivers solid performance across both heating and cooling seasons.

Review

The Goodman 3-ton combination system represents the brand's practical approach to residential HVAC, pairing a high-efficiency furnace with a solid air conditioner in a compact horizontal configuration. This 36,000 BTU cooling and 80,000 BTU heating combination targets mid-sized homes and replacement applications where budget matters but performance cannot be sacrificed. Goodman has built contractor trust through straightforward designs, and this unit maintains that philosophy with single-stage components that prioritize reliability over complexity.

The furnace delivers 96% AFUE efficiency, which means nearly all natural gas fuel converts to usable heat, a meaningful upgrade from older 80-85% equipment still operating in many homes. The air conditioner achieves 13 SEER1, translating to moderate cooling efficiency without premium pricing. Electrically, the system requires 115V single-phase power and draws between 19.1 and 30 amps, fitting standard residential breaker panels. The reciprocating compressor operates at 74 dB, which is audible but not unusual for single-stage designs. Maximum airflow reaches 2,000 CFM through the multi-speed blower.

Pros & Cons

Pros

96% AFUE furnace efficiency captures nearly all fuel heat, reducing gas bills significantly compared to 80-85% older units
13 SEER cooling rating meets modern efficiency standards for air conditioning performance
80,000 BTU heating output handles demanding winter climates and larger homes effectively
Single-stage reciprocating compressor design proven dependable with minimal moving parts
Multi-speed blower motor optimizes airflow across varying load conditions
36,000 BTU cooling capacity pairs appropriately with 80,000 BTU heating for balanced seasonal performance

Cons

Not ENERGY STAR certified, missing federal recognition despite solid efficiency ratings
Single-stage compressor cannot modulate capacity, running at full output when activated
74 dB noise level registers moderately loud during compressor operation, noticeable in quiet spaces
Reciprocating compressor technology less quiet than newer scroll or rotary designs
Lacks variable-stage heating capability with single burner configuration

Who Should Buy

Best For

Homeowners in colder climates replacing 20-year-old furnaces will appreciate the 96% AFUE savings on heating bills. Contractors building budget-conscious systems for rental properties or new construction benefit from proven Goodman reliability and straightforward installation.

Consider Alternatives If

Buyers seeking ultra-quiet operation or ENERGY STAR certification should explore higher-tier models with scroll compressors and variable staging.

3 Ton 13 SEER 96% AFUE 80,000 BTU Goodman Gas Furn

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Installation

This horizontal A-coil configuration suits attic or basement installation with upflow airflow direction. Suction and liquid lines measure 7/8 inch and 3/8 inch respectively, requiring proper refrigerant charging during startup. The unit requires plastic or PVC exhaust flue venting, and the right-side flue location must be verified before installation. Sweat-type connections demand soldering skill or professional help. Total weight of 30 pounds allows single-technician handling.

Warranty & Reliability

Goodman provides 10 years of parts coverage with online registration, a solid commitment protecting against compressor and heat exchanger failures. This warranty requires owners to complete registration, which is straightforward but must happen within the grace period. Labor costs fall on the homeowner, so budget accordingly for service calls. The coverage period is competitive for equipment at this price point.

Specifications

SKU	LS38783830
Brand/Manufacturer	Online Supply
Cooling BTU	36,000
Heating BTU	80,000
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	3.5 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

How much can I expect to save on heating bills with 96% AFUE compared to older furnaces? +

A 96% AFUE furnace saves approximately 10-15% heating costs annually versus an 80% unit, and up to 20% versus pre-1990s equipment. Actual savings depend on local gas rates, insulation quality, and thermostat settings. For a $150-200 monthly winter bill, you could save $15-40 per month during heating season.

Does this system require special electrical work or circuit modifications? +

The 115V single-phase 60Hz requirement fits standard residential circuits. Maximum breaker size is 30 amps, which accommodates the unit's 19.1-amp minimum draw. Most homes already have adequate service, but verify your panel capacity before purchasing. Professional installation ensures correct breaker sizing and circuit protection.

Is 13 SEER cooling efficiency good enough for summer comfort? +

13 SEER is solid mid-range cooling efficiency, delivering reliable 36,000 BTU capacity for a 3-ton system. It won't match 16+ SEER premium units, but it provides dependable summer comfort without excessive operating costs. Real-world performance depends on proper installation, adequate ductwork, and regular filter maintenance.

How does the single-stage compressor compare to variable-capacity systems? +

Single-stage compressors run at full capacity when active, cycling on and off to maintain temperature. Variable-capacity competitors run at partial load most of the time, offering quieter, more efficient operation. Single-stage is simpler, more durable, and less expensive, but less efficient during partial-load conditions and generally noisier.

What's covered under the 10-year warranty, and what's excluded? +

Parts coverage includes the compressor, coils, heat exchanger, and electrical components. Labor is not covered. Online registration is required to activate coverage. Improper installation, refrigerant contamination, or lack of maintenance can void the warranty, so keep service records.

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