3 Ton 14 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 where 80% AFUE heating meets code requirements. At $2,053, it delivers competitive cooling efficiency (14 SEER) and practical heating capacity (80,000 BTU) without premium pricing.

Review

The Goodman 3-ton combo system (SKU LS38343830) represents a practical middle ground in the residential HVAC market. This upflow, A-coil configuration bundles a 36,000 BTU air conditioner with an 80,000 BTU gas furnace capable of burning propane or natural gas. At $2,053, it's positioned to appeal to cost-conscious homeowners, contractors managing tight budgets, and replacement scenarios where existing ductwork permits upflow installation without major modifications.

Performance specs show 14 SEER cooling efficiency and 80% AFUE heating output. The air conditioner uses R410A refrigerant with a scroll compressor in single-stage operation, meaning it runs at full capacity or off, with no modulation. The furnace features two burner stages, reducing runtime and improving temperature consistency versus single-stage alternatives. The variable-speed blower motor reaches 2,000 CFM, allowing better air distribution in larger homes compared to fixed-speed designs.

Pros & Cons

Pros

14 SEER cooling efficiency provides solid savings on AC costs compared to older 10-12 SEER units
Two-stage burner for heating reduces short cycling and improves comfort during winter operation
Variable-speed blower motor adjusts to 2,000 CFM maximum, optimizing airflow and reducing energy waste
Scroll compressor is proven reliable architecture used across residential HVAC applications
A-coil upflow configuration fits standard attic or basement installations with minimal ductwork modifications

Cons

80% AFUE is entry-level efficiency, not high-efficiency; condensing models reach 95%+ AFUE
Single-stage cooling compressor cycles on/off fully, less precise than two-stage units
Not Energy Star certified, limiting utility rebate eligibility in some regions
73 dB noise level is moderate, noticeable during operation in quieter homes

Who Should Buy

Best For

Budget-conscious homeowners in climate zones 4-6 replacing 15+ year-old systems and contractors building spec homes where upfront cost matters more than premium efficiency. This system handles typical 3-ton cooling loads reliably without oversizing or undersizing in most residential applications.

Consider Alternatives If

Buyers in high-efficiency markets (Northeast, Pacific Northwest) seeking rebates should look at Energy Star models, and homes in hot climates needing 16+ SEER cooling should consider two-stage compressor units.

3 Ton 14 SEER 80% AFUE 80,000 BTU Goodman Gas Furn

$2053

Buy at HVACDirect →

Installation

Installation requires 120V, 1-phase, 60Hz electrical service with 18.7 to 30-amp breaker capacity. The unit weighs 35 pounds and measures 34.5 inches tall, 21 inches wide, and 28.75 inches deep, fitting standard attic or utility closet spaces. Refrigerant lines include 3/8-inch liquid and 3/4-inch suction connections with 3/4-inch insulation thickness on the suction line. Metal exhaust flue is mandatory for safe furnace venting.

Warranty & Reliability

Goodman covers this system with a standard 10-year parts warranty activated through online registration. This is industry-standard coverage for entry-level residential equipment but requires proof of professional installation. Labor coverage and compressor-specific terms depend on your installer's extended warranty offerings, so confirm details before purchase.

Specifications

SKU	LS38343830
Brand/Manufacturer	Online Supply
Cooling BTU	36,000
Heating BTU	80,000
Refrigerant	R410A
Electrical	120 V. 1 Phase 60 Hz
Warranty	10 Years with Online Registration
Decibel Level (dBA)	73
Weight (in lbs)	35.000000
Feature	Spec
Energy Star	No
SEER1 (Efficiency)	14
Condenser Stages	Single Stage
Compressor Type	Scroll
Liquid Line	3/8"
Suction Line	3/4"
Liquid Valve Size	3/8"
Suction Valve Size	3/4"
Max Breaker Size	30 Amps
Min. Breaker Size	18.7 Amps
Tonnage	3.5 Ton
Height	34.5"
Width	21"
Depth	28.75"
Resources	Goodman Brochure Goodman Installation Instructions Goodman Parts Manual Goodman Service Manual Goodman Technical Information Goodman User Information Goodman Warranty You will need AdobeÂ® AcrobatÂ® 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
Style	A-Coil
AHRI Certificate Number	204633302
Airflow Direction	Upflow/Horizontal
Exhaust Flue Requirement	Metal
Furnace Efficiency / AFUE	80%
Blower Motor	Variable Speed
Maximum CFM	2000
Burner Stages	Two
Fuel Type	Propane, Natural Gas
Suction Line Insulation Thickness	3/4"
Length	30 feet

Frequently Asked Questions

How does 14 SEER cooling compare to my current 10-year-old system? +

A 14 SEER unit uses approximately 28% less energy than a 10 SEER system for the same cooling output. On a typical 2,000-hour cooling season in moderate climates, expect $300-500 annual savings on electricity costs, depending on local rates and thermostat settings.

Can this furnace burn both natural gas and propane? +

Yes, this model accepts either fuel type, but it must be configured for your specific gas supply during installation. Switching fuels later requires factory-authorized conversion by a licensed technician, so confirm your fuel type before purchase.

Is 80% AFUE heating efficient enough? +

80% AFUE meets current building codes nationwide and works well for moderate climates. However, high-efficiency condensing furnaces achieve 95% AFUE and reduce heating costs by 15-20% annually, making them worthwhile in cold regions with long heating seasons.

Will this system be quieter than my 20-year-old unit? +

At 73 dB, this system is quieter than most older furnaces but slightly louder than premium variable-speed models running at part load. In continuous operation, you'll notice the sound, though most homeowners consider it acceptable for residential use.

Do I need to register this warranty myself? +

Yes, the 10-year warranty requires online registration with Goodman. Without registration, coverage may default to shorter terms, so complete this step immediately after installation to protect your investment.

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