5 Ton 16 SEER 96% AFUE 120,000 BTU Goodman Gas Furnace and Air Conditioner System - Horizontal Review 2026

// Bottom Line

This Goodman system works best for homeowners replacing aging equipment in climates with moderate to heavy cooling and heating demands. The 16 SEER rating and 96% AFUE efficiency deliver measurable savings on utility bills, while the variable-speed ECM blower and two-stage burner provide consistent comfort without constant cycling.

Review

The Goodman 5-ton horizontal system represents a solid mid-market choice for whole-home heating and cooling. This unit combines a 54,000 BTU air conditioner with a 120,000 BTU furnace, creating an integrated solution for regional climates demanding both robust summer cooling and winter warmth. Energy Star certification and an AHRI certificate number 7368842 confirm this pairing meets industry standards for matched performance.

Performance metrics tell the real story here. The 16 SEER cooling rating outpaces many competitor offerings in this tonnage class, while the 96% AFUE furnace operates near theoretical maximum efficiency for gas-fired equipment. The variable-speed ECM blower modulates between zero and 2000 CFM based on demand, reducing energy waste during partial-load conditions common in spring and fall. Two-stage burner operation prevents the heating equivalent of short-cycling, maintaining closer temperature control.

Pros & Cons

Pros

16 SEER rating delivers energy savings of 20-30% versus older single-stage units, particularly valuable in hot climates
96% AFUE furnace efficiency means nearly all fuel converts to heat, reducing winter heating costs substantially
Variable-speed ECM blower motor adjusts output from near-silent operation to full 2000 CFM capacity as needed
Two-stage burner reduces short-cycling and maintains steadier indoor temperatures throughout heating season
Scroll compressor design proven for reliability with minimal maintenance over 15+ year lifespan

Cons

Single-stage cooling means compressor runs at full capacity, leading to higher noise levels at 73 dBA during peak operation
Requires 29.6 to 50-amp electrical service, potentially necessitating panel upgrades in older homes
Horizontal configuration limits placement options, restricting suitability for certain attic or closet installations

Who Should Buy

Best For

Homeowners replacing complete systems in climates experiencing both significant heating and cooling loads will see the strongest ROI from this unit's dual-efficiency approach. This system also suits contractors seeking a reliable, mid-tier option that balances performance with cost-effectiveness.

Consider Alternatives If

Buyers needing ultra-quiet operation or two-stage cooling should explore variable-capacity units, as the single-stage compressor at 73 dBA may feel intrusive in bedroom settings during hot afternoons.

5 Ton 16 SEER 96% AFUE 120,000 BTU Goodman Gas Fur

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Installation

This horizontal A-coil unit requires 50-foot suction line insulation at 1/2-inch thickness and standard refrigerant connections using 3/8-inch liquid and 1 1/8-inch suction lines. Electrical demands range from 29.6 to 50 amps on 115V single-phase power. PVC exhaust flue compatibility simplifies installation in many existing furnace locations. Standard ductwork modifications typically complete the job within one day.

Warranty & Reliability

Goodman backs the heat exchanger with a lifetime warranty and all components with 10-year protection upon online registration. This substantial coverage reflects confidence in product durability. Heat exchanger warranty particularly matters, as furnace failure at this point typically signals replacement time rather than repair.

Specifications

SKU	LS381183850
Brand/Manufacturer	Online Supply
Cooling BTU	54,000
Heating BTU	120,000
Refrigerant	R410A
Electrical	115 V. 1 Phase 60 Hz
Warranty	Lifetime Heat Exchanger and 10 Years Parts with Online Registration
Decibel Level (dBA)	73
Weight (in lbs)	48.000000
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	50 amps
Min. Breaker Size	29.6 amps
Tonnage	5 Ton
Height	34.5"
Width	24.5"
Depth	28.75"
Resources	Goodman Brochure Goodman Install Instructions Goodman Parts Manual Goodman Service Manual Goodman Specifications Goodman Technical Information Goodman User Information Goodman 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.
Configuration	Upflow/Horizontal
Liquid Line	3/8"
Suction Line	1 1/8"
Style	A-Coil
AHRI Certificate Number	7368842
Airflow Direction	Upflow/Horizontal
Exhaust Flue Requirement	Plastic / PVC
Product Features	Rebate Available
Furnace Efficiency / AFUE	96%
Blower Motor	Variable Speed - ECM
Maximum CFM	2000
Burner Stages	Two
Fuel Type	Propane, Natural Gas
Suction Line Insulation Thickness	1/2"
Length	50 feet

Frequently Asked Questions

How does 16 SEER actually translate to my cooling costs? +

SEER measures efficiency against a standard baseline. A 16 SEER unit uses roughly 20-30% less electricity than a 10-13 SEER system for identical cooling output. In hot climates running AC 6-8 months annually, this difference saves $300-600 yearly depending on local electricity rates and usage patterns.

Can I install this unit myself, or do I need a licensed technician? +

EPA regulations require licensed technicians to handle refrigerants, making DIY installation illegal. However, experienced HVAC contractors complete installations in 4-6 hours once the system arrives at the job site. Horizontal positioning simplifies attic or basement placement compared to vertical configurations.

What makes the 96% AFUE furnace different from standard models? +

AFUE measures heating efficiency by comparing fuel burned to heat delivered. At 96%, this furnace converts nearly all propane or natural gas into usable warmth. Standard models operate around 80-85%, meaning 96% AFUE saves roughly 15-20% on heating fuel costs annually in northern climates.

How does this 5-ton unit compare to Lennox or Carrier offerings at similar price points? +

Goodman prioritizes value over premium features. You're getting equivalent SEER ratings and AFUE efficiency to brand-name competitors, but with simpler controls and single-stage cooling. Choose Goodman for reliability and savings, Lennox or Carrier if variable-speed cooling noise concerns you.

Does the 10-year parts warranty cover compressor failure? +

Yes, the scroll compressor falls under full parts coverage for 10 years with registration. Labor costs remain your responsibility. Most compressor failures occur beyond this window, making the early-year protection valuable insurance against manufacturing defects.

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