5 Ton 14 SEER 96% AFUE 120,000 BTU Goodman Gas Furnace and Air Conditioner System - Horizontal Review 2026

// Bottom Line

This Goodman system is ideal for contractors and homeowners upgrading older furnaces in moderate to large homes needing both heating and cooling. The 96% AFUE rating delivers meaningful energy savings, while the two-stage burner and ECM blower provide comfort and flexibility across heating seasons.

Review

The Goodman 5-ton gas furnace and air conditioner system addresses a common market need: reliable equipment that balances heating and cooling without premium pricing. Online Supply markets this horizontal configuration as a practical solution for retrofit installations where space is tight. The unit combines proven Goodman engineering with solid component choices, including a scroll compressor and ECM blower motor that real contractors have worked with for years.

Heating performance centers on a 120,000 BTU capacity with 96% AFUE efficiency, which ranks among the best gas furnaces available today. The two-stage burner modulates between high and low firing rates, reducing energy waste during partial-load conditions common in shoulder seasons. Cooling delivers 57,000 BTU from a single-stage compressor, though this single-stage design means the AC runs at full output even when partial cooling would suffice. Airflow reaches 2,000 CFM maximum via the ECM blower, adjustable to different speed settings for balanced operation.

Pros & Cons

Pros

Exceptional 96% AFUE means heating efficiency in the top tier, reducing winter utility costs noticeably compared to standard 80% systems
Two-stage burner design modulates heat output, reducing short cycling and improving comfort during mild weather
Multi-speed ECM blower motor adjusts airflow intelligently, cutting energy waste and improving temperature consistency throughout homes
Horizontal configuration works well in attic, basement, or crawlspace installations where vertical clearance is limited
PVC flue compatibility simplifies venting in modern construction and retrofit applications

Cons

SEER rating of 16 is solid but doesn't match ultra-high-efficiency units reaching 18-20 SEER in current market
Single-stage condenser limits cooling modulation, so the AC runs at full capacity regardless of load conditions
73 dB noise level is moderate, which may be noticeable during blower operation in quiet homes

Who Should Buy

Best For

Contractors installing systems in multi-story homes or homes with space constraints will appreciate the horizontal configuration and straightforward installation. Homeowners in moderate climates prioritizing winter heating efficiency over premium cooling will see solid payback from the 96% AFUE rating.

Consider Alternatives If

Buyers in extremely hot climates where cooling dominance matters more than heating should explore variable-capacity AC units with higher SEER ratings instead.

5 Ton 14 SEER 96% AFUE 120,000 BTU Goodman Gas Fur

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Installation

This horizontal unit requires standard gas, electrical, and refrigerant connections typical of split systems. The 208/230V single-phase power demand and 32.8 to 50 amp breaker range fit most residential panels. PVC flue venting simplifies installation in newer homes. Dimensions of 24.5 inches tall by 26 inches wide by 21.125 inches deep work well in attics, basements, or crawlspaces. The 3/8-inch liquid line and 7/8-inch suction line with 50-foot included insulation accommodate typical residential runs.

Warranty & Reliability

The 10-year warranty with online registration provides solid protection for both furnace and coil components. This duration is competitive but requires registration to activate, so buyers must complete the paperwork promptly. Coverage appears to include parts, though specific labor provisions depend on the retailer and local contractor agreements. The Goodman Evaporator Coil Warranty adds extra confidence for the cooling side.

Specifications

SKU	LS38783850
Brand/Manufacturer	Online Supply
Cooling BTU	57,000
Heating BTU	120,000
Refrigerant	R410A or R22
Electrical	208 / 230 V. 1 Phase 60 Hz
Warranty	10 Years with Online Registration
Decibel Level (dBA)	73
Weight (in lbs)	30.000000
Feature	Spec
Airflow Direction	Upflow/Horizontal
Exhaust Flue Requirement	Plastic / PVC
Furnace Efficiency / AFUE	96%
Blower Motor	Multi-Speed - ECM
Maximum CFM	2000
Configuration	Horizontal
Flue Location	Right
Energy Star	No
Burner Stages	Two
Fuel Type	Gas
Height	24.5"
Width	26"
Depth	21.125"
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.
SEER1 (Efficiency)	16
Condenser Stages	Single Stage
Compressor Type	Scroll
Liquid Valve Size	3/8"
Suction Valve Size	7/8"
Max Breaker Size	50 amps
Min. Breaker Size	32.8 amps
Tonnage	5 Ton
Liquid Line	3/8"
Suction Line	7/8"
Style	A-Coil
Suction Line Insulation Thickness	3/4"
Length	50 feet

Frequently Asked Questions

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

AFUE measures how much fuel energy becomes usable heat. At 96%, only 4% escapes as waste, versus 20% waste in 80% systems. On a 120,000 BTU furnace running a typical heating season, upgrading from 80% to 96% AFUE can cut heating costs 15-20%, with payback in 5-8 years depending on local gas prices.

Is the horizontal configuration suitable for my basement installation? +

Yes, the horizontal design fits basements well. At 24.5 inches tall and 21.125 inches deep, it sits flush against walls or in tight spaces. Verify that return air ducting can reach the unit and that the PVC flue vents properly. Check local codes for furnace clearance requirements, typically 12-18 inches from walls.

Will the two-stage burner really make a noticeable difference? +

Two-stage burners improve comfort and efficiency. During mild weather or nighttime, the furnace fires at low stage, reducing on-off cycling that causes temperature swings. At full capacity, it reaches 120,000 BTU. Most users notice smoother heating with fewer temperature drops and less blower noise.

How does this system compare to higher-SEER units? +

This unit's 16 SEER is respectable but below top-tier 18-20 SEER systems. Cooling capacity (57,000 BTU) matches the 5-ton rating adequately. If cooling dominance matters, look at variable-capacity units. If heating matters more, the 96% AFUE delivers superior value for the price in northern climates.

What happens if I don't register the warranty? +

The 10-year warranty requires online registration to activate. Without registration, coverage may be limited or denied. Register immediately after installation using the information on the unit nameplate. Keep proof of registration and the receipt for warranty claims.

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