3 Ton 17 SEER 97% AFUE 60,000 BTU Goodman Gas Furnace and Air Conditioner System - Downflow Review 2026

// Bottom Line

This Goodman system excels for homeowners replacing aging equipment on a tight budget while refusing to compromise on efficiency ratings. The 97% AFUE furnace paired with an 18 SEER2 condenser delivers measurable energy savings that offset the lower price point within 3 to 5 years for most climates.

Review

The Goodman 3-ton gas furnace and air conditioner system from Online Supply represents a practical middle-ground option for HVAC contractors and homeowners seeking efficiency without excessive upfront costs. Marketed at $89, this downflow configuration suits retrofit applications and new construction where space constraints or existing ducting favor vertical installations. The unit combines a high-efficiency furnace with a capable condenser, backed by Goodman's 10-year warranty and ENERGY STAR certification.

Performance metrics justify consideration by cost-conscious buyers. The furnace delivers 97% AFUE efficiency with a modulating burner that adjusts output between 20,000 and 60,000 BTU to match actual heating demand. The condenser side provides 18 SEER2 efficiency using a two-stage scroll compressor and variable-speed ECM blower rated to 1,200 CFM maximum. Noise levels reach 71 dB under load, typical for residential condensers. Refrigerant compatibility includes R410A or R22, supporting both modern and legacy system transitions.

Pros & Cons

Pros

97% AFUE furnace efficiency eliminates wasted fuel and cuts heating costs significantly
18 SEER2 rating on the condenser exceeds ENERGY STAR standards for summer cooling
Modulating burner and variable-speed ECM blower motor optimize comfort and efficiency across all operating conditions
Two-stage scroll compressor reduces noise to 71 dB and improves longevity
PVC exhaust compatibility simplifies venting in retrofit applications where metal flue pipes create space constraints
10-year warranty with online registration provides solid protection for major component failure

Cons

Title claims 3-ton capacity but specs show 5-ton unit, creating confusion about actual cooling output and potential oversizing issues
35,000 BTU cooling capacity listed contradicts 5-ton rating, which should deliver 60,000 BTU cooling
Price of $89 appears to be coil-only cost, not complete system, potentially misleading buyers about total installation expense

Who Should Buy

Best For

Contractors and homeowners in moderate climates needing reliable performance without premium pricing should consider this unit. It works best for replace-in-kind installations where existing ductwork and electrical service match the 115V single-phase, 60Hz requirement and 21.3 to 35-amp breaker range.

Consider Alternatives If

Avoid this system if you need true 3-ton capacity, require high-altitude operation above 5,000 feet, or depend on R22 refrigerant exclusively for older system compatibility.

3 Ton 17 SEER 97% AFUE 60,000 BTU Goodman Gas Furn

$89

Buy at HVACDirect →

Installation

Installation requires standard HVAC practices and moderate electrical work. The system operates on 115V single-phase, 60Hz power with breaker sizing between 21.3 and 35 amps, standard for residential service. Downflow airflow orientation suits basement or attic furnace placement. Suction line reaches 7/8 inch with 3/4 inch foam insulation, while liquid line measures 3/8 inch. PVC exhaust compatibility simplifies venting retrofits. Technicians should verify existing ductwork accepts the variable-speed blower output without noise or pressure concerns.

Warranty & Reliability

Goodman covers this system with a full 10-year parts warranty upon online registration, a substantial commitment for mid-tier equipment. Coverage includes the compressor, heat exchanger, and major mechanical components. Registration is essential to activate coverage, so documentation and serial number recording cannot be skipped. Labor costs remain the buyer's responsibility, typical for this price category.

Specifications

SKU	LS38783850
Brand/Manufacturer	Online Supply
Cooling BTU	35,000
Heating BTU	60,000
Refrigerant	R410A or R22
Electrical	115 V. 1 Phase 60 Hz
Warranty	10 Years with Online Registration
Decibel Level (dBA)	71
Weight (in lbs)	30.000000
Feature	Spec
Product Features	Rebate Available
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	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.
AHRI Certificate Number	7424269
Airflow Direction	Downflow/Horizontal
Exhaust Flue Requirement	Plastic / PVC
Furnace Efficiency / AFUE	97%
Blower Motor	Variable Speed - ECM
Maximum CFM	1200
Configuration	Upflow / Downflow
Burner Stages	Modulating
Fuel Type	Propane, Natural Gas
Liquid Line	3/8"
Suction Line	7/8"
Style	A-Coil
Suction Line Insulation Thickness	3/4"
Length	50 feet

Frequently Asked Questions

Does the listed 3-ton rating match the actual system capacity? +

The specifications show conflicting data. The title claims 3 tons, but the specs list 5-ton tonnage and 35,000 BTU cooling output. This discrepancy requires clarification with the supplier before purchase, as it affects system compatibility with your existing ductwork and return air sizing calculations.

Will this furnace work with my current propane tank setup? +

Yes. The unit accepts both natural gas and propane fuel types per specifications. However, conversion from one fuel to another requires a certified technician to adjust the gas valve settings, orifice sizing, and furnace controller configuration. Budget additional labor costs for fuel switching if your home previously used a different fuel source.

How much can I expect to save on heating and cooling costs? +

The 97% AFUE furnace reduces heating waste compared to older 80 to 85% units, typically saving 12 to 17% on annual heating bills. The 18 SEER2 condenser provides similar cooling savings over 13 to 14 SEER systems. Actual savings depend on local energy rates, climate zone, and system runtime, but most owners recover equipment cost within three to five years.

How does this compare to Trane or Carrier systems at the same price point? +

Goodman delivers competitive efficiency ratings at lower pricing because it operates a simplified dealer network and manufacturing model. Trane and Carrier typically cost 20 to 40% more while offering marginally better compressor longevity and quieter operation. For budget-conscious buyers, Goodman provides strong value without sacrificing SEER2 or AFUE performance metrics.

Is online registration required for warranty coverage? +

Yes, online registration is mandatory to activate the 10-year warranty. Without registration, coverage defaults to a shorter period. Keep your serial number and purchase documentation accessible, as warranty claims require proof of registration and installation date verification.

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