3 Ton 13 SEER 80% AFUE 80,000 BTU Goodman Gas Furnace and Air Conditioner System - Upflow Review 2026

// Bottom Line

This Goodman system works best for budget-conscious homeowners and contractors replacing older equipment in existing homes where high-end efficiency upgrades aren't justified. At $2,705, you're getting respectable mid-tier performance without the premium pricing of 95% AFUE or 16+ SEER units.

Review

The Goodman 3 Ton gas furnace and air conditioner system is a competent mid-market HVAC solution designed for straightforward residential replacement applications. At $2,705, it occupies the practical middle ground between budget equipment and premium high-efficiency models. This upflow-configured unit combines an 80,000 BTU furnace with a 36,000 BTU (3 ton) air conditioner, making it suitable for homes in the 1,200-1,600 square foot range. Goodman equipment has solid contractor acceptance, and this particular system carries AHRI certification number 204633307, confirming it meets performance standards.

Performance metrics show a balanced efficiency profile. The 80% AFUE rating means 80 cents of every heating dollar actually warms your home, a meaningful step above budget 75% models but below premium 95% units. On the cooling side, the 13 SEER rating translates to roughly $30-50 annual savings versus minimum-code 10 SEER equipment in typical climates. The two-stage burner adjusts heating output for better temperature stability, while the variable-speed blower motor runs at reduced capacity during mild conditions, cutting runtime and noise. Maximum airflow reaches 2,000 CFM, and electrical requirements are reasonable at 208/230V single-phase with a 30-amp breaker maximum.

Pros & Cons

Pros

80% AFUE furnace efficiency is above minimum code in most states, delivering real heating savings over 70-75% units
13 SEER cooling rating meets EnergyStar-equivalent performance for air conditioning without premium cost
Two-stage burner provides better temperature control and comfort compared to single-stage models
Variable-speed blower motor adjusts output from 0-2000 CFM, reducing runtime noise and energy waste
10-year warranty with online registration covers parts and compressor fully
Dual fuel capability accepts both natural gas and propane without modifications

Cons

Not Energy Star certified, limiting eligibility for some utility rebates that could offset purchase price
Single-stage condenser means cooling runs at full capacity only, less efficient than two-stage units in mild weather
74 dB noise level is moderate, noticeably louder than high-efficiency units with variable-stage compressors
R410A refrigerant is standard but will eventually face phase-down pressure as HVAC industry shifts toward lower-GWP alternatives

Who Should Buy

Best For

Homeowners replacing 15-25 year old systems who want reliable performance without stretching budgets toward $4,000+ high-efficiency models. Contractors servicing residential properties in moderate climates where 80% AFUE and 13 SEER represent reasonable cost-to-benefit tradeoffs.

Consider Alternatives If

Anyone in very cold climates, considering long-term ownership beyond 15 years, or targeting maximum utility rebates should look at 95% AFUE furnaces paired with 16+ SEER cooling instead.

3 Ton 13 SEER 80% AFUE 80,000 BTU Goodman Gas Furn

$2705

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Installation

Installation demands standard HVAC skills and equipment. The unit requires a metal exhaust flue for the furnace section, proper refrigerant lines sized at 3/8 inch liquid and 7/8 inch suction with 3/8 inch insulation thickness, and 30 feet of lineset maximum run. Upflow configuration suits basements or utility closets. Installation manuals are available as PDFs, and the relatively compact footprint (30 inches tall, 24.5 inches wide, 21 inches deep) fits most existing equipment spaces.

Warranty & Reliability

Coverage extends 10 years on parts and compressor when registered online, a standard industry offering. This covers manufacturing defects, labor is not included. Ten years aligns with typical equipment lifespan, providing solid protection. Registration is straightforward and unlocks the full benefit, protecting your investment during the critical first decade of operation.

Specifications

SKU	LS38783830
Brand/Manufacturer	Online Supply
Cooling BTU	36,000
Heating BTU	80,000
Refrigerant	R410A
Electrical	208 / 230 V. 1 Phase 60 Hz
Warranty	10 Years with Online Registration
Decibel Level (dBA)	74
Weight (in lbs)	30.000000
Feature	Spec
AHRI Certificate Number	204633307
Airflow Direction	Upflow/Horizontal
Exhaust Flue Requirement	Metal
Furnace Efficiency / AFUE	80%
Blower Motor	Variable Speed
Maximum CFM	2000
Configuration	Upflow / Downflow
Burner Stages	Two
Fuel Type	Propane, Natural Gas
Height	30"
Width	24.5"
Depth	21"
Resources	CAPT Installation Manual CAPT 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.
Replaces	GSX130362, GSX130363, GSX130365
Energy Star	No
SEER1 (Efficiency)	13
Condenser Stages	Single Stage
Compressor Type	Reciprocating
Liquid Valve Size	3/8"
Suction Valve Size	3/4"
Max Breaker Size	30 amps
Min. Breaker Size	19.1 amps
Tonnage	3.5 Ton
Valve Type	Sweat
Liquid Line	3/8"
Suction Line	7/8"
Style	A-Coil
Suction Line Insulation Thickness	3/8"
Length	30 feet

Frequently Asked Questions

How does 80% AFUE compare to my old furnace? +

If your current furnace is 15-20 years old, it likely runs at 70-75% AFUE. An 80% AFUE unit delivers 5-10% better heating efficiency, translating to $100-200 annual savings on heating costs depending on climate and usage. Over 15 years, that's significant cumulative savings justifying replacement costs.

Can this system work with my existing ductwork and electrical panel? +

Likely yes. The unit operates on standard 208/230V single-phase power and requires a 19.1-30 amp breaker. Most homes built after 1980 have adequate electrical service. Ductwork compatibility depends on your current system's size and condition. An HVAC contractor can assess this in 30 minutes and advise on any modifications needed.

Is 13 SEER good cooling efficiency? +

Yes. 13 SEER meets modern efficiency standards without premium pricing. It delivers tangible performance, roughly 25-35% better than 10 SEER minimum equipment. You'll notice comfort improvements and lower summer electric bills. High-efficiency 16-18 SEER units cost significantly more with proportionally smaller savings for most climates.

How does this compare to Carrier or Lennox equipment at similar prices? +

Goodman delivers competitive specs at lower prices than Carrier or Lennox branded systems. Build quality is respectable though parts availability occasionally lags premium brands. For budget-conscious buyers, Goodman offers solid value. Premium brands justify costs through brand reputation and marginally higher efficiency tiers, not necessarily better reliability in this efficiency range.

What does the 10-year warranty actually cover? +

Parts and compressor defects for 10 years with online registration. Labor, refrigerant, and normal maintenance are your responsibility. It's a solid standard warranty. Extended warranties are available separately and may be worth considering if you plan to own the system beyond 10 years.

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