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

// Bottom Line

This Goodman system excels for homeowners in mixed climates who need reliable dual-fuel heating and cooling without premium pricing. The 96% AFUE furnace with two-stage burners and 16 SEER air conditioner delivers solid year-round efficiency, making it ideal for property owners who want energy savings with proven brand support.

Review

The Goodman 3-ton dual-fuel system represents a practical middle ground in the HVAC market. With 96% AFUE heating efficiency and 16 SEER cooling performance, it addresses homeowners seeking strong seasonal efficiency without premium pricing. Online Supply positions this A-coil configured unit as a flexible solution for upflow installations, and the dual-fuel capability adds practical value for regions where fuel switching makes economic sense.

The furnace delivers 120,000 BTU heating output across two burner stages, while the air conditioner produces 34,800 BTU cooling capacity. The variable-speed ECM blower handles up to 2,000 CFM, enabling precise airflow matching to demand. Electrical requirements are modest at 115V single-phase 60Hz with 18.7 to 30 amps maximum breaker capacity. The scroll compressor and R410A refrigerant provide established reliability and serviceable components available from most HVAC wholesalers.

Pros & Cons

Pros

96% AFUE furnace efficiency with two-stage burners reduces heating costs significantly compared to 80-90% alternatives
16 SEER cooling rating qualifies for Energy Star certification and delivers strong summer performance
Variable-speed ECM blower motor provides quiet operation at 73.5 dB and adapts to demand for comfort
Dual-fuel capability handles both natural gas and propane, offering flexibility for regional availability
Lifetime heat exchanger warranty shows manufacturer confidence in core component durability
A-coil configuration works with both upflow and horizontal installations for flexible home layouts

Cons

Single-stage compressor lacks modulation capability, meaning less precise comfort control than variable-capacity units
73.5 dB noise level runs slightly louder than some high-end competitors, potentially noticeable in quiet spaces
Tonnage spec mismatch in documentation (header says 3 ton, specs list 5 ton) creates confusion for buyers

Who Should Buy

Best For

Contractors installing systems in homes with existing ductwork requiring upflow or horizontal A-coil configuration, and homeowners in regions where dual-fuel flexibility matters. This system rewards buyers focused on efficiency ratings and long-term heating reliability over cutting-edge modulation features.

Consider Alternatives If

Anyone prioritizing whisper-quiet operation or seeking variable-capacity compressors for micro-zoned comfort control should evaluate alternatives.

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

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Installation

Installation requires standard R410A handling and proper line sizing. The 3/8 inch liquid line and 7/8 inch suction line accommodate the system design, with 3/4 inch insulation thickness on the suction line mandatory for efficiency. PVC plastic exhaust flue is required, which simplifies venting in many installations. The 34.5 inch height and 24.5 inch width fit standard wall spaces, though contractors should verify ductwork compatibility with 2,000 CFM maximum airflow.

Warranty & Reliability

Goodman backs the heat exchanger with a lifetime warranty, protecting your most expensive component indefinitely. Parts coverage extends 10 years with online registration required. This approach incentivizes proper registration and provides meaningful long-term protection compared to industry-standard 5-year coverage, though homeowners should register immediately after installation to activate benefits.

Specifications

SKU	LS38783850
Brand/Manufacturer	Online Supply
Cooling BTU	34,800
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)	73.5
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	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	7/8"
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	3/4"
Length	50 feet

Frequently Asked Questions

What does the 16 SEER rating actually mean for my cooling costs? +

SEER measures seasonal cooling efficiency. A 16 SEER system uses roughly 30% less electricity for cooling than a 12 SEER unit. Your actual savings depend on climate, usage patterns, and local electricity rates. In hot climates, expect 15-25% annual cooling cost reductions versus 10-year-old systems.

Can I install this system horizontally in an attic space? +

Yes. The A-coil configuration supports both upflow and horizontal mounting. Verify your attic framing supports the 30-pound weight and allows proper airflow clearance. Horizontal installation works well for attic ducts but requires careful drainage line slope to prevent condensate backup.

Should I choose this over a variable-capacity system? +

This single-stage compressor costs less and runs reliably but cycles on/off rather than modulating capacity. For consistent comfort in variable outdoor temperatures, variable-capacity systems offer superior comfort. This Goodman works well where temperatures swing less frequently or budget constraints matter most.

What's the difference between SEER and SEER2 ratings? +

SEER2 is the newer test standard using more realistic efficiency conditions. The 16 SEER rating shown here uses older SEER methodology. When comparing to new units, expect SEER2 ratings approximately 15-20% lower than SEER for equivalent performance levels.

Does the lifetime heat exchanger warranty cover installation or labor? +

The lifetime warranty covers the heat exchanger component only, not labor or installation costs. Parts coverage requires online registration within 30 days. You pay labor if the heat exchanger fails, typically running $400-800 for furnace access and replacement work.

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