Independent Review · Updated June 2026

3 Ton 17 SEER 97% AFUE 100,000 BTU Goodman Gas Furnace and Air Conditioner System - Horizontal

High-efficiency 3-ton system with 97% AFUE and 18 SEER1 at budget pricing

8.2
IndustrialRank Score
Efficiency
8.5
Reliability
7.8
Value
8.0
Installation
8.5
Warranty
8.0
3 Ton 17 SEER 97% AFUE 100,000 BTU Goodman Gas Furnace and Air Conditioner System - Horizontal
Current Price
$89
Check Price at HVACDirect → Shop Now at HVACDirect
Authorized dealer · Full manufacturer warranty
// Bottom Line
This Goodman system is ideal for contractors and homeowners prioritizing efficiency without premium pricing. The 97% AFUE furnace paired with an 18 SEER1 air conditioner makes it excellent for moderate climates where both heating and cooling matter equally.

Review

This Goodman horizontal configuration combines a high-efficiency gas furnace with a capable air conditioning condenser in one package. Priced at $89, it represents solid value for contractors stocking mid-range equipment. The system is engineered for downflow/horizontal installation, making it adaptable to basement, attic, or closet placements. Online Supply backs this unit with rebate eligibility and a 10-year warranty upon registration, positioning it as an accessible option in the competitive residential HVAC market.

The furnace delivers 100,000 BTU heating output with 97% AFUE efficiency, meaning 97 cents of every energy dollar converts to usable heat. The air conditioning side produces 35,000 BTU cooling capacity with an 18 SEER1 rating, reflecting strong cooling efficiency. The two-stage scroll compressor and modulating burner work together to reduce runtime, lower utility bills, and maintain more consistent indoor temperatures. Variable-speed ECM blower technology adjusts to actual demand rather than running at full power constantly.

Pros & Cons

Pros

  • 97% AFUE furnace efficiency reduces heating costs significantly compared to 80-90% units
  • 18 SEER1 cooling rating delivers strong efficiency for residential 3-ton applications
  • Modulating burner stages allow precise heating control and reduced energy waste
  • Variable-speed ECM blower motor optimizes airflow at 2000 CFM maximum
  • Two-stage scroll compressor provides quieter, more efficient operation at 71 dB
  • PVC exhaust flue compatibility simplifies venting in modern homes

Cons

  • Product title lists 17 SEER but specs show 18 SEER1, creating labeling confusion
  • 3.5-ton actual tonnage does not match advertised 3-ton rating
  • 71 dB noise level is audible during operation, louder than premium competitors
  • Limited warranty details provided beyond 10-year term with registration

Who Should Buy

Best For

Contractors installing systems in homes where energy bills are a primary concern and homeowners in mixed climates needing reliable heating and cooling. This system works well for homes 1500-2500 square feet that run both furnace and AC seasonally.

Consider Alternatives If

Buyers in extremely hot climates should consider higher SEER ratings, and those in cold-only regions may find a furnace-only solution more cost-effective.

3 Ton 17 SEER 97% AFUE 100,000 BTU Goodman Gas Fur
$89
Buy at HVACDirect →

Installation

This horizontal A-coil unit requires proper ductwork sizing and clearance for the 21 inch height and 26 inch depth. Suction line insulation at 3/4 inch thickness is included for the 7/8 inch copper line. Electrical connection needs 115V single-phase 60 Hz power with a 21.3 to 35 amp breaker. PVC exhaust flue installation is straightforward compared to metal venting, reducing labor time and material costs significantly.

Warranty & Reliability

The 10-year warranty applies when you complete online registration after purchase. This coverage protects against defects in materials and workmanship across the entire system. Warranty duration is competitive for mid-tier equipment, though exact component coverage limitations are not detailed in available documentation. Registration is required, so buyers must take this step within the specified timeframe.

Specifications

SKULS38783850
Brand/ManufacturerOnline Supply
Cooling BTU35,000
Heating BTU100,000
RefrigerantR410A or R22
Electrical115 V. 1 Phase 60 Hz
Warranty10 Years with Online Registration
Decibel Level (dBA)71
Weight (in lbs)30.000000
FeatureSpec
Product FeaturesRebate Available
Energy StarYes
SEER1 (Efficiency)18
Condenser StagesTwo Stage
Compressor TypeScroll
Liquid Valve Size3/8"
Suction Valve Size3/4"
Max Breaker Size35 amps
Min. Breaker Size21.3 amps
Tonnage3.5 Ton
Valve TypeSweat
Height21"
Width21.125"
Depth26"
ResourcesCHPF Installation Manual CHPF Specifications Sheet Goodman Evaporator Coil Warranty You will need Adobe® Acrobat® Reader to view PDF documents.
Safety InformationPROPOSITION 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 Number7424272
Airflow DirectionDownflow/Horizontal
Exhaust Flue RequirementPlastic / PVC
Furnace Efficiency / AFUE97%
Blower MotorVariable Speed - ECM
Maximum CFM2000
ConfigurationHorizontal
Burner StagesModulating
Fuel TypePropane, Natural Gas
Liquid Line3/8"
Suction Line7/8"
StyleA-Coil
Suction Line Insulation Thickness3/4"
Length50 feet

Frequently Asked Questions

Why does the product title say 17 SEER but specs list 18 SEER1? +
This appears to be a labeling discrepancy. SEER1 is the updated efficiency rating replacing legacy SEER measurements. The 18 SEER1 specification is the current metric you should rely on. Contact Online Supply to clarify this mismatch before purchasing.
Can this horizontal unit fit in my basement with limited headroom? +
The unit measures 21 inches tall and 26 inches deep, requiring minimal vertical clearance. However, ensure ductwork connections and refrigerant lines can route properly. Consult your HVAC installer to verify fit in your specific basement layout and confirm compliance with local building codes.
How much will this system save on monthly heating costs compared to a standard 80% AFUE furnace? +
At 97% AFUE versus 80%, you convert 17 percentage points more fuel to heat. On a $100 heating bill, you'd save roughly $17. Actual savings depend on local gas prices, climate zone, insulation quality, and usage patterns. Multiply by your heating season length for annual savings.
Is 18 SEER1 adequate for hot climates, or should I buy a higher-rated unit? +
18 SEER1 is good for mixed climates but adequate rather than exceptional. Hot climates benefit from 20+ SEER1 ratings. If you're in zones with six-month cooling seasons, consider upgrading. This unit excels where heating and cooling loads are roughly balanced.
What happens if I don't register within the warranty period? +
Your warranty becomes invalid. Registration is mandatory to activate the 10-year coverage. Complete this immediately upon installation to protect your investment and ensure support if equipment fails.

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