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

// Bottom Line

This Goodman system works best for homeowners replacing aging equipment in moderate climates who want proven reliability without premium pricing. The 80% AFUE furnace and 16 SEER2 condenser balance operating costs with upfront affordability, making it ideal for budget-conscious buyers prioritizing long-term value over cutting-edge efficiency.

Review

The Goodman 3-ton gas furnace and air conditioner system represents the pragmatic middle ground in residential HVAC replacement. This upflow-configured unit pairs an 80,000 BTU furnace with a 34,800 BTU cooling condenser, creating a complete solution for homes averaging 1200 to 1800 square feet. Online Supply positions this equipment as the sensible choice for contractors and homeowners balancing performance, durability, and budget constraints in today's competitive market.

Performance specs reveal a system engineered for reliable operation rather than cutting-edge efficiency. The furnace delivers 80% AFUE with two-stage burner control, while the outdoor condenser achieves 16 SEER2 rating with a scroll compressor and single-stage operation. The high-efficiency multi-speed blower reaches 2000 CFM maximum airflow, supporting proper distribution across ductwork. These numbers confirm Energy Star certification but indicate this equipment targets contractors managing replacement budgets rather than efficiency-first applications.

Pros & Cons

Pros

16 SEER2 cooling efficiency exceeds the stated 15 SEER rating, delivering stronger cooling performance than advertised
80,000 BTU heating output with two-stage burner provides consistent comfort across varying outdoor temperatures
High-efficiency multi-speed blower motor with 2000 CFM maximum airflow reduces energy waste and improves air distribution
Energy Star certification confirms real-world efficiency gains versus standard equipment
10-year warranty with online registration provides solid protection for parts and labor coverage

Cons

80% AFUE falls behind modern condensing furnaces rated 95% AFUE, resulting in higher heating costs over time
Single-stage compressor cycles on and off rather than modulating, reducing comfort precision during partial-load conditions
73.5 dB noise level ranks louder than premium competitors, potentially noticeable in quieter homes or during evening operation

Who Should Buy

Best For

Homeowners in moderate climates replacing 10-15 year old equipment want straightforward performance without complexity. Contractors installing budget-conscious residential replacements appreciate the proven Goodman reliability and simplified two-stage operation.

Consider Alternatives If

Buyers seeking maximum efficiency should pursue 95%+ AFUE furnaces and 18+ SEER2 compressors, as this system's 80% rating will cost significantly more to operate over 15 years.

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

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Installation

Installation requires standard 120V single-phase 60Hz electrical with breaker sizing between 18.7 and 30 amps, fitting most residential panels without upgrades. The unit accepts R410A or R22 refrigerant, with 3/8 inch liquid and 7/8 inch suction line connections featuring 3/4 inch insulation rated to 50 feet. Metal exhaust flue is required for the two-stage gas furnace operation. Upflow configuration suits most basements and utility closets.

Warranty & Reliability

Coverage spans 10 years on compressor, coil, and parts when registered online following purchase. This standard commercial warranty reflects Goodman's reputation for durable equipment but lacks the extended protections offered by premium manufacturers. Registration is straightforward and strongly recommended to activate full coverage from the purchase date.

Specifications

SKU	LS38783850
Brand/Manufacturer	Online Supply
Cooling BTU	34,800
Heating BTU	80,000
Refrigerant	R410A or R22
Electrical	120 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	5 Ton
Height	30"
Width	21"
Depth	21"
Resources	CAPF Installation Manual CAPF 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.
Airflow Direction	Upflow/Horizontal
Exhaust Flue Requirement	Metal
Furnace Efficiency / AFUE	80%
Blower Motor	High Efficiency Multi-Speed
Maximum CFM	2000
Configuration	Upflow / Downflow
Burner Stages	Two
Fuel Type	Gas
Liquid Line	3/8"
Suction Line	7/8"
Style	A-Coil
Suction Line Insulation Thickness	3/4"
Length	50 feet

Frequently Asked Questions

How does the 16 SEER2 rating compare to other mid-range systems? +

At 16 SEER2, this condenser outperforms the stated 15 SEER specification and sits solidly in the efficient-but-practical category. High-end systems reach 20-22 SEER2, but this unit's scroll compressor design balances efficiency with proven reliability, making it competitive for replacement applications.

Is the 80% AFUE furnace adequate for northern climates? +

For heating-heavy regions, 80% AFUE generates substantially higher annual fuel bills than 95%+ condensing models. If you experience consistent winters below 20 degrees Fahrenheit, upgrading to a high-efficiency condenser furnace could recover costs within 8-10 years through reduced heating cycles.

What does the two-stage burner accomplish? +

Two-stage burner modulation reduces on-off cycling by running at reduced capacity during mild outdoor temperatures, cutting gas consumption and improving comfort consistency. This feature particularly benefits partial heating loads during spring and fall shoulder seasons.

Can this system work with existing ductwork from my old unit? +

Yes, provided your ducts are sized appropriately for the 2000 CFM maximum airflow. Existing R22 systems can transition to this equipment, though many contractors recommend ductwork evaluation to ensure proper CFM delivery and static pressure handling.

Does online registration really matter for warranty coverage? +

Yes. Online registration is mandatory to activate the full 10-year coverage period. Without registration, coverage typically defaults to one year, making this simple step essential for protecting your investment.

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