3 Ton 15 SEER 96% AFUE 80,000 BTU Goodman Gas Furnace and Air Conditioner System - Horizontal Review 2026

// Bottom Line

This Goodman system excels for homeowners seeking solid efficiency without premium pricing in mixed climates where both heating and cooling matter equally. The 96% AFUE heating and 16 SEER1 cooling deliver measurable energy savings, making it ideal for moderate-sized homes replacing aging equipment.

Review

The Goodman 3-ton horizontal combo system positions itself squarely in the value-conscious segment, offering respectable efficiency metrics without flagship pricing. This unit combines a 96% AFUE two-stage gas furnace with a 16 SEER1 air conditioner in a compact horizontal package suitable for attic or closet installation. Online Supply markets this as a balanced all-in-one solution for homeowners seeking moderate performance gains over older equipment.

Performance numbers tell a practical story. The furnace delivers 80,000 BTU output across two burner stages, while the condenser produces 34,800 BTU cooling capacity. The variable-speed ECM blower motor tops out at 1,600 CFM and adjusts constantly to match load, reducing short cycling and unnecessary runtime. At 73.5 dB, operation is noticeable but typical for this class. The 16 SEER1 rating qualifies for Energy Star certification, though it sits below premium 18-20 SEER1 alternatives.

Pros & Cons

Pros

96% AFUE furnace efficiency reduces winter heating costs substantially compared to 80-90% systems
16 SEER1 cooling rating qualifies for Energy Star, supporting rebates in many states
Variable-speed ECM blower motor adjusts airflow intelligently, improving comfort and reducing runtime
Two-stage burner provides better temperature control and quieter operation at part load
10-year warranty with online registration covers manufacturing defects on major components

Cons

73.5 dB noise level is audible during operation, noticeable in quiet living spaces
Single-stage compressor cannot modulate cooling capacity, cycling on and off rather than ramping smoothly
Spec sheet lists conflicting tonnage (title says 3 ton, specs show 3.5 ton) creating confusion
Requires professional installation for proper refrigerant charge and electrical setup

Who Should Buy

Best For

Homeowners in moderate climates with mixed heating and cooling needs who want efficiency gains without ultra-premium pricing. Contractors replacing 10-15 year old systems for budget-conscious customers who qualify for utility rebates.

Consider Alternatives If

Anyone in consistently hot climates needing variable-capacity cooling should consider higher SEER2 units with two-stage compressors for better modulation.

3 Ton 15 SEER 96% AFUE 80,000 BTU Goodman Gas Furn

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Installation

This horizontal configuration works well in attics or side-mounted installations where upflow space is limited. Requires 115V single-phase 60Hz power with 18.7 to 30-amp breaker sizing. Technicians must ensure proper refrigerant line sizing (3/8 inch liquid, 7/8 inch suction) with 3/4 inch insulation over 50 feet of run. PVC flue termination is mandatory. Professional installation remains essential for system balancing.

Warranty & Reliability

The 10-year parts warranty activates with online registration and covers compressor, heat exchanger, and coil defects. This is solid mid-tier protection, though some competitors now offer 12-year or limited lifetime coverage. The Evaporator Coil Warranty extends coverage on the indoor unit, reducing replacement risk for the costliest failure point.

Specifications

SKU	LS38783850
Brand/Manufacturer	Online Supply
Cooling BTU	34,800
Heating BTU	80,000
Refrigerant	R410A or R22
Electrical	115 V. 1 Phase 60 Hz
Warranty	10 Years with Online Registration
Decibel Level (dBA)	73.5
Weight (in lbs)	30.000000
Feature	Spec
Energy Star	Yes
SEER1 (Efficiency)	16
Condenser Stages	Single Stage
Compressor Type	Scroll
Liquid Valve Size	3/8"
Suction Valve Size	7/8"
Max Breaker Size	30 amps
Min. Breaker Size	18.7 amps
Tonnage	3.5 Ton
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.
AHRI Certificate Number	7368835
Airflow Direction	Upflow/Horizontal
Exhaust Flue Requirement	Plastic / PVC
Furnace Efficiency / AFUE	96%
Blower Motor	Variable Speed - ECM
Maximum CFM	1600
Configuration	Horizontal
Flue Location	Right
Burner Stages	Two
Fuel Type	Propane, Natural Gas
Liquid Line	3/8"
Suction Line	7/8"
Style	A-Coil
Suction Line Insulation Thickness	3/4"
Length	50 feet

Frequently Asked Questions

Why does the spec sheet list both 3 ton and 3.5 ton capacity? +

The discrepancy appears to be a data entry error. The 34,800 BTU cooling output and 80,000 BTU heating capacity correspond to a true 3-ton system, not 3.5 tons. Verify tonnage with the AHRI certificate number 7368835 before ordering to ensure proper system sizing for your home.

Can this system be installed in an existing setup with R22 refrigerant? +

The unit accepts either R410A or R22 refrigerant, but mixing is strictly prohibited. If replacing an R22 system, technicians must flush and clean all lines thoroughly. New R22 is increasingly rare and expensive, so upgrading to R410A is typically more cost-effective long term.

How much money will I save on energy bills compared to a 90% AFUE furnace? +

The 6-percentage-point AFUE gain (96% vs 90%) typically saves 6-8% on annual heating costs in northern climates. For a $1,200 annual heating bill, expect savings of $70-95 yearly. Combined with 16 SEER1 cooling efficiency, total savings reach 8-12% in mixed climates over seven years.

Should I buy this or pay more for a single-stage 18 SEER1 unit? +

The 16 SEER1 here suits moderate climates well. If you live in the hot South, a 18-20 SEER1 unit with two-stage compressor justifies the premium through modulating cooling. In mild climates, this Goodman's efficiency-to-cost ratio is hard to beat.

What does the warranty actually cover if my furnace fails at year five? +

Online registration grants 10-year parts coverage for manufacturing defects on the heat exchanger, compressor, and coil. Labor costs and refrigerant are typically not covered. Review the full warranty terms before purchase.

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