3 Ton 15.5 SEER 80% AFUE 100,000 BTU Goodman Gas Furnace and Air Conditioner System - Upflow Review 2026

// Bottom Line

This Goodman system delivers genuine value for budget-conscious homeowners upgrading older equipment or maintaining rental properties. At $647, it offers respectable 15.5 SEER cooling and 80% AFUE heating without premium pricing, though it won't match high-efficiency models in long-term energy savings.

Review

The Goodman 3-ton 15.5 SEER gas furnace and air conditioner system represents the practical middle ground in HVAC equipment, delivering respectable performance at genuinely accessible pricing. At $647, this upflow A-coil configuration targets homeowners and contractors who need dependable cooling and heating without investing in premium-tier systems. Goodman's market position emphasizes reliability over cutting-edge innovation, making this unit a logical choice for straightforward replacement scenarios.

Performance specifications reveal solid capabilities across both heating and cooling. The system delivers 34,800 cooling BTU with a SEER1 rating of 16, slightly exceeding the advertised 15.5 SEER threshold. Heating output reaches 100,000 BTU at 80% AFUE with two-stage burner capability, meaning it modulates between high and low firing rates for better efficiency and comfort. The variable-speed blower adjusts airflow up to 2,000 CFM, preventing the constant cycling typical of single-stage systems. Operating noise at 73.5 dBA falls within acceptable ranges for residential installations.

Pros & Cons

Pros

SEER1 rating of 16 exceeds the advertised 15.5 SEER, providing cooling efficiency above typical entry-level units
Two-stage burner with variable-speed blower improves comfort and efficiency compared to single-stage systems
100,000 BTU heating capacity handles cold climates effectively for a 3-ton system
Energy Star certified and includes 10-year warranty with online registration at no extra cost
Lightweight at 30 lbs and compact dimensions (34.5" H x 21" W x 28.75" D) simplify replacement installations

Cons

80% AFUE is standard, not high-efficiency; buyers seeking premium performance should consider 90%+ AFUE models
Single-stage compressor lacks modulation capability, meaning cooling runs at full capacity or off with no intermediate settings
No ENERGY STAR Most Efficient designation despite meeting basic Energy Star criteria

Who Should Buy

Best For

Budget-conscious homeowners replacing failed systems in moderate climates, and landlords managing multiple properties who need reliable equipment without premium costs. Contractors seeking affordable replacement units for value-conscious customers will appreciate the straightforward installation and proven Goodman reliability.

Consider Alternatives If

Homeowners in extreme climates or those prioritizing maximum efficiency should explore 90%+ AFUE furnaces and higher SEER units, which recoup their higher upfront cost through 15-20 year operational savings.

3 Ton 15.5 SEER 80% AFUE 100,000 BTU Goodman Gas F

$647

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Installation

This upflow A-coil model suits attic or basement installations where vertical airflow works with existing ductwork. Electrical requirements remain straightforward: 120V single-phase 60Hz service with breaker sizing between 18.7 and 30 amps. Refrigerant lines use 3/8 inch liquid and 7/8 inch suction connections with 3/4 inch insulation and 50-foot maximum length. Metal exhaust flue is required. Most installations take experienced technicians 4-6 hours.

Warranty & Reliability

The 10-year parts warranty requires online registration but covers manufacturing defects without additional fees, a consumer-friendly policy for budget equipment. Labor coverage varies by installer, so confirm details before purchase. This warranty period aligns with expected equipment lifespan if properly maintained, offering reasonable protection without premium extended options.

Specifications

SKU	LS38783850
Brand/Manufacturer	Online Supply
Cooling BTU	34,800
Heating BTU	100,000
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	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
Liquid Line	3/8"
Suction Line	7/8"
Style	A-Coil
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	50 feet

Frequently Asked Questions

Why does the spec sheet show 3.5 tons while the product title says 3 tons? +

The system is marketed as 3-ton capacity but the condenser unit specifications list 3.5 tons. This discrepancy reflects the matching furnace/condenser pairing. Verify exact tonnage matches your ductwork and existing equipment before ordering to ensure proper sizing and efficiency.

Can this system work with both R410A and R22 refrigerant? +

The specs indicate R410A or R22 compatibility, though modern Goodman systems are typically R410A only. Confirm refrigerant type with Online Supply or your installer before installation. Using the wrong refrigerant damages the compressor and voids warranty, so verification is critical.

How much will this system save on energy bills compared to older equipment? +

At 80% AFUE and SEER 16, expect 15-25% heating savings versus 1980s-1990s equipment and 30-40% cooling savings versus pre-2000 air conditioners. Annual savings depend on climate, usage patterns, and local energy rates, typically ranging $200-500 for moderate climates.

Is this Goodman unit comparable to higher-priced Bryant or Carrier systems at this price point? +

Goodman, Bryant, and Carrier share manufacturing ownership but differ in branding and support tiers. This unit competes directly with Bryant Evolution and entry Carrier equipment. Real-world performance is comparable, though premium brands offer longer warranties and slightly faster service response times.

What does the 10-year warranty actually cover if something fails? +

The warranty covers manufacturing defects in parts like the compressor, coils, and heat exchanger. It does not cover installation damage, improper refrigerant charge, or routine maintenance. Online registration is required, and labor costs are your responsibility unless your installer provides additional coverage.

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