3 Ton 17 SEER 96% AFUE 80,000 BTU Goodman Gas Furnace and Air Conditioner System - Upflow Review 2026

// Bottom Line

This Goodman system delivers excellent efficiency ratings (18 SEER2, 96% AFUE) for homeowners upgrading to a premium split system. Best suited for moderate climates where two-stage heating and cooling will run efficiently year-round without constant cycling.

Review

Goodman's two-stage system combines a gas furnace and air conditioner in a single upflow configuration, targeting homeowners seeking efficiency upgrades. This A-coil design works with most existing ductwork and accepts both natural gas and propane fuel. The 96% AFUE furnace and 18 SEER2 condenser reflect modern efficiency standards, positioning this unit as a solid mid-to-premium option for residential HVAC replacement projects.

Performance metrics are impressive across both heating and cooling. The furnace delivers 80,000 BTU heating output with two-stage burners, while the air conditioner produces 35,000 BTU cooling capacity. The variable-speed ECM blower motor reaches 1600 CFM maximum, allowing balanced airflow throughout the home. Two-stage operation means the system runs at partial capacity during mild weather, reducing energy consumption and extending component life compared to single-stage designs.

Pros & Cons

Pros

18 SEER2 cooling efficiency with two-stage condenser and scroll compressor for variable performance
96% AFUE heating efficiency with two-stage burner and variable-speed ECM blower motor
Energy Star certified, reducing operational costs significantly over system lifetime
Scroll compressor technology runs quieter at 71 dBA and with longer component lifespan
Lifetime heat exchanger warranty plus 10-year parts coverage with online registration
1600 CFM maximum airflow supports flexible ductwork configurations and room comfort

Cons

Specs show 5-ton cooling capacity but product title claims 3-ton, creating potential specification confusion
35,000 BTU cooling output is undersized for true 5-ton operation, suggesting rating mismatch
Requires 115V single-phase power with 21.3 to 35-amp breaker, limiting some older home installations
Two-stage operation may not deliver maximum efficiency in very mild climates with light load requirements

Who Should Buy

Best For

Homeowners in moderate climates replacing older furnace and AC units who value efficiency and want to lower energy bills. Contractors seeking reliable Goodman equipment with solid warranty support for residential retrofit projects.

Consider Alternatives If

Buyers in extremely hot or cold climates needing single-stage simplicity, or those with electrical panels that cannot support 35-amp breaker requirements should explore alternatives.

3 Ton 17 SEER 96% AFUE 80,000 BTU Goodman Gas Furn

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Installation

This upflow unit measures 34.5 inches tall, 21 inches wide, and 28.75 inches deep, fitting standard closet or basement installations. Refrigerant lines use 3/8 inch liquid and 7/8 inch suction with 3/4 inch insulation thickness. Electrical connection requires 115V single-phase 60Hz service with breaker sizing between 21.3 and 35 amps. Exhaust uses plastic PVC flue venting from the right flue location.

Warranty & Reliability

Goodman provides a lifetime warranty on the heat exchanger, addressing the most expensive potential failure point. Parts coverage extends 10 years with online registration, offering substantial protection beyond industry standard five-year terms. This warranty structure rewards proactive maintenance and registration, reducing long-term ownership risk for conscientious homeowners.

Specifications

SKU	LS38783850
Brand/Manufacturer	Online Supply
Cooling BTU	35,000
Heating BTU	80,000
Refrigerant	R410A
Electrical	115 V. 1 Phase 60 Hz
Warranty	Lifetime Heat Exchanger and 10 Years Parts with Online Registration
Decibel Level (dBA)	71
Weight (in lbs)	30.000000
Feature	Spec
Product Features	Two Stage Condenser
Energy Star	Yes
SEER1 (Efficiency)	18
Condenser Stages	Two Stage
Compressor Type	Scroll
Liquid Valve Size	3/8"
Suction Valve Size	3/4"
Max Breaker Size	35 amps
Min. Breaker Size	21.3 amps
Tonnage	5 Ton
Valve Type	Sweat
Height	34.5"
Width	21"
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	7368835
Airflow Direction	Upflow/Horizontal
Exhaust Flue Requirement	Plastic / PVC
Furnace Efficiency / AFUE	96%
Blower Motor	Variable Speed - ECM
Maximum CFM	1600
Flue Location	Right
Burner Stages	Two
Fuel Type	Propane, Natural Gas
Suction Line Insulation Thickness	3/4"
Length	50 feet

Frequently Asked Questions

Why does the product title say 3 ton when specs list 5 tons? +

This appears to be a specification discrepancy. The 35,000 BTU cooling output aligns more closely with 3-ton capacity, while the 5-ton rating seems incorrect. Contact the manufacturer with AHRI certificate 7368835 to confirm actual tonnage before purchasing. Accurate sizing is critical for proper system performance.

Can this system work in my older home with 100-amp service? +

Yes. The system requires 21.3 to 35-amp breaker sizing, which most 100-amp panels accommodate. However, verify your panel has available breaker space and that your electrician approves the installation. Some older panels may need evaluation if you're upgrading from smaller equipment.

How much will this system reduce my heating and cooling costs? +

The 18 SEER2 and 96% AFUE ratings can reduce energy costs 20-30% compared to 13 SEER and 80% AFUE systems, depending on climate and usage patterns. Two-stage operation further improves efficiency by reducing runtime during partial-load conditions, maximizing savings in moderate climates.

Is Goodman equipment reliable compared to Carrier or Lennox? +

Goodman offers solid reliability with excellent warranty support, though they use identical compressors and core components as premium brands. The real difference lies in contractor support networks. Check local HVAC contractor availability for your area before deciding, as service quality matters more than brand during repairs.

What does the lifetime heat exchanger warranty actually cover? +

It covers manufacturing defects in the heat exchanger for the system's entire life. Labor costs and refrigerant refill are typically not included. Review the full warranty document before purchase to understand limitations and registration requirements.

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