2 Ton 15 SEER 80% AFUE 100,000 BTU Goodman Gas Furnace and Air Conditioner System - Horizontal Review 2026

// Bottom Line

This Goodman system works well for homeowners replacing aging 2-ton equipment who want solid efficiency without premium pricing. The 80% AFUE and 16 SEER ratings deliver real energy savings, and the horizontal configuration fits tight attic or basement spaces where upflow won't work.

Review

The Goodman 2-ton horizontal system occupies a practical middle ground in the HVAC market. Designed for installers dealing with space constraints, this unit delivers Energy Star certification without premium pricing. It replaces the GSX16S241 model and comes ready for R410A or R22 refrigerant, making it adaptable to existing infrastructure. The horizontal configuration opens installation possibilities in cramped attics, basements, and crawl spaces where traditional upflow units cannot fit.

Performance specs reflect a sensible balance between efficiency and cost. The 100,000 BTU heating capacity pairs with an 80% AFUE rating, meaning 80 cents of every heating dollar converts to usable warmth. On cooling, the 23,600 BTU output and 16 SEER rating provide adequate capacity for modest homes in moderate climates. The variable speed blower operates from 0 to 2000 CFM, adjusting to actual heating and cooling demand rather than running at full power continuously, which reduces energy waste and extends equipment life.

Pros & Cons

Pros

Energy Star qualified with 16 SEER cooling efficiency and 80% AFUE heating
Variable speed blower motor adjusts airflow from 0 to 2000 CFM for comfort and efficiency
Two-stage burner provides better temperature control and reduced short-cycling
Compact horizontal design fits tight installation spaces (21 x 21.125 x 26 inches)
10-year warranty with online registration covers parts comprehensively

Cons

80% AFUE trails modern 95% AFUE high-efficiency furnaces by 15 percentage points
Single-stage condenser limits cooling flexibility compared to two-stage models
Scroll compressor is durable but less efficient than newer rotary designs in some applications
71.5 dB noise level is moderate, not the quietest option available

Who Should Buy

Best For

Homeowners with 2-ton cooling needs seeking horizontal configuration compatibility, particularly those in attics or basements where upflow installation is impossible. Budget-conscious buyers who want 80% minimum efficiency without paying for premium 95% AFUE models.

Consider Alternatives If

Anyone prioritizing maximum heating efficiency should compare 95% AFUE systems instead, as long-term gas savings offset higher upfront costs in most climates.

2 Ton 15 SEER 80% AFUE 100,000 BTU Goodman Gas Fur

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Installation

This horizontal system requires metal exhaust flue venting and 208/230 volt single-phase 60 Hz power. A 12.4 to 20 amp breaker supplies the electrical load. Refrigerant lines arrive with 3/4 inch suction line insulation pre-installed up to 50 feet, simplifying field connections. Horizontal orientation demands careful ductwork design to prevent condensate backup in the furnace section. Professional installation is strongly recommended for proper airflow balance.

Warranty & Reliability

Goodman backs this system with a 10-year parts warranty when you register online after purchase. Coverage includes the compressor, scroll mechanism, and primary components. This matches industry standard for mid-range equipment. Note that labor and refrigerant are typically excluded, a common limitation in the HVAC industry requiring separate service agreements.

Specifications

SKU	LS38343850
Brand/Manufacturer	Online Supply
Cooling BTU	23,600
Heating BTU	100,000
Refrigerant	R410A or R22
Electrical	208 / 230 V. 1 Phase 60 Hz
Warranty	10 Years with Online Registration
Decibel Level (dBA)	71.5
Weight (in lbs)	22.000000
Feature	Spec
Airflow Direction	Upflow/Horizontal
Exhaust Flue Requirement	Metal
Furnace Efficiency / AFUE	80%
Blower Motor	Variable Speed
Maximum CFM	2000
Configuration	Horizontal
Burner Stages	Two
Fuel Type	Propane, Natural Gas
Height	21"
Width	21.125"
Depth	26"
Resources	CHPF Installation Manual CHPF 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	GSX16S241
Energy Star	Yes
SEER1 (Efficiency)	16
Condenser Stages	Single Stage
Compressor Type	Scroll
Liquid Valve Size	3/8"
Suction Valve Size	3/4"
Max Breaker Size	20 amps
Min. Breaker Size	12.4 amps
Tonnage	3.5 Ton
Liquid Line	3/8"
Suction Line	3/4"
Style	A-Coil
Suction Line Insulation Thickness	3/4"
Length	50 feet

Frequently Asked Questions

What does the 16 SEER cooling rating really mean for my electricity bills? +

SEER measures cooling efficiency as BTU output per watt input. A 16 SEER unit consumes roughly 20% less electricity than a 13 SEER model running the same cooling load. On a typical 2-ton system running 800 hours annually, expect 150 to 200 dollar annual savings versus older 10 SEER equipment, depending on local electricity rates.

Can I install this in a tight attic space, and what's involved? +

Yes, the horizontal design fits spaces as small as 21 x 21.125 x 26 inches. You'll need metal ductwork for the flue, proper support brackets to prevent vibration, and adequate return air pathways. Horizontal installation requires careful condensate line routing to prevent water backup into the furnace. Hire an experienced installer familiar with horizontal configurations.

Is 80% AFUE outdated compared to newer furnaces? +

Modern 95% AFUE furnaces recover exhaust heat more effectively, but they cost 800 to 1200 dollars more upfront. In regions with heating seasons under 4000 hours annually, payback takes 8 to 12 years. For moderate climates or planned 15 year equipment life, 80% AFUE remains practical and cost-effective.

How does this Goodman compare to similar Lennox or Carrier systems? +

Goodman delivers comparable cooling performance at lower cost, typically 300 to 500 dollars less than Lennox or Carrier equivalents. Build quality is solid, though some contractors perceive Goodman as entry-level. All three brands offer similar warranties when registered. Choose Goodman if budget matters most; Lennox or Carrier if you prefer brand prestige.

Does online registration really matter for the 10-year warranty? +

Yes, absolutely. Without online registration, warranty coverage defaults to 5 years. Registration takes five minutes on Goodman's website and requires your purchase date and serial number. Always complete registration immediately after installation to protect your investment.

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