Independent Review · Updated June 2026

3 Ton 17 SEER 80% AFUE 80,000 BTU Goodman Gas Furnace and Air Conditioner System - Horizontal

Energy Star certified 3-ton system combining 80% AFUE heating with 18 SEER cooling at contractor-friendly pricing

8.2
IndustrialRank Score
Efficiency
8.5
Reliability
7.8
Value
8.0
Installation
8.5
Warranty
8.0
3 Ton 17 SEER 80% AFUE 80,000 BTU Goodman Gas Furnace and Air Conditioner System - Horizontal
Current Price
$2160
Check Price at HVACDirect → Shop Now at HVACDirect
Authorized dealer · Full manufacturer warranty
// Bottom Line
This horizontal Goodman system delivers solid efficiency for mixed climates where both heating and cooling matter equally. Best suited for contractors replacing mid-range equipment or homeowners in moderate climates seeking Energy Star certification without premium pricing.

Review

This 3-ton Goodman horizontal system represents the middle ground for contractors and homeowners who need balanced heating and cooling without premium pricing. The unit combines an 80,000 BTU furnace with 35,000 BTU cooling capacity in a horizontal A-coil configuration designed for attic installations. Energy Star certification and solid component quality make it reliable for most residential applications, though it falls short of high-efficiency categories in both modes.

Performance specs tell a practical story. The furnace delivers 80% AFUE efficiency with dual-stage burners and a variable-speed blower reaching 2000 CFM, while cooling achieves 18 SEER1 via a two-stage scroll compressor and condenser. The unit runs at 71 dB, stays within standard electrical requirements (21.3 to 35 amps at 120V), and uses R410A refrigerant. Real-world heating output reaches 80,000 BTU, perfect for homes averaging 1500 to 2000 square feet in moderate climates.

Pros & Cons

Pros

  • 18 SEER2 cooling efficiency with two-stage compressor and condenser reduces runtime and energy bills in summer months
  • 80% AFUE furnace with two-stage burner and variable-speed blower minimizes heating waste during winter operation
  • Horizontal A-coil configuration fits tight attic spaces, making it ideal for retrofit installations where vertical space is limited
  • Scroll compressor technology delivers reliable, quiet operation at 71 dB with minimal vibration transfer
  • 10-year warranty with online registration provides meaningful coverage at this price point, protecting against compressor failure

Cons

  • 80% AFUE rating lags behind high-efficiency condensing models (95% plus) by approximately 15 percentage points, adding long-term fuel costs
  • Specs list 17 SEER in title but 18 SEER1 in data, creating labeling confusion around actual seasonal efficiency
  • R410A refrigerant compatibility limits future serviceability if supply chains shift or regulations change within the 10-year warranty period

Who Should Buy

Best For

Contractors installing replacement systems in homes with existing horizontal ductwork and tight attic spaces will appreciate the compact 50-foot suction line and straightforward sweat valve connections. Homeowners in mixed climates with moderate heating and cooling demands benefit from the balanced 80,000 BTU furnace and 35,000 BTU cooling capacity without overpaying for ultra-high-efficiency models.

Consider Alternatives If

Buyers in very cold climates needing serious heating efficiency or extremely hot climates demanding maximum cooling should explore 95% AFUE furnaces or 20+ SEER systems respectively.

3 Ton 17 SEER 80% AFUE 80,000 BTU Goodman Gas Furn
$2160
Buy at HVACDirect →

Installation

Installation complexity is moderate for licensed technicians. The horizontal design requires metal exhaust flue ducting and fits standard attic cavities at 24.5 inches tall and 26 inches deep. Sweat valve connections demand soldering skills, and the 3/8-inch liquid line with 3/4-inch suction insulation thickness follow industry standards. Variable-speed blower integration into existing ductwork typically takes 4 to 6 hours for experienced crews.

Warranty & Reliability

Online Supply backs this unit with a straightforward 10-year parts warranty following online registration. This covers the compressor, heat exchanger, and major components against defects but excludes labor and refrigerant. At this price point, the coverage is competitive and meaningful for homeowners planning to stay in their homes long term.

Specifications

SKULS38783850
Brand/ManufacturerOnline Supply
Cooling BTU35,000
Heating BTU80,000
RefrigerantR410A or R22
Electrical120 V. 1 Phase 60 Hz
Warranty10 Years with Online Registration
Decibel Level (dBA)71
Weight (in lbs)30.000000
FeatureSpec
Product FeaturesTwo Stage Condenser
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
Height24.5"
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 Number204633307
Airflow DirectionUpflow/Horizontal
Exhaust Flue RequirementMetal
Furnace Efficiency / AFUE80%
Blower MotorVariable Speed
Maximum CFM2000
ConfigurationHorizontal
Burner StagesTwo
Fuel TypePropane, Natural Gas
Liquid Line3/8"
Suction Line7/8"
StyleA-Coil
Suction Line Insulation Thickness3/4"
Length50 feet

Frequently Asked Questions

How does 18 SEER1 compare to typical market offerings? +
18 SEER1 sits above the minimum Energy Star threshold (16 SEER) but trails premium units at 20+ SEER. It represents a balanced approach, delivering meaningful efficiency gains versus basic 14 SEER equipment while keeping cost increases modest. Expect 15 to 20 percent lower cooling costs than non-Energy Star models.
Will this fit my attic with limited height? +
Yes, the horizontal A-coil configuration measures 24.5 inches tall and 26 inches deep, fitting most standard attic framing. The 50-foot suction line provides installation flexibility. However, verify your ductwork can accept sweat-connection fittings before ordering.
Is 80% AFUE heating adequate for northern climates? +
80% AFUE works in moderate climates but underperforms in extreme cold. Northern homes benefit from 95% condensing furnaces that cut fuel waste by half. This unit suits zones with heating degree days under 6,000 annually, roughly ASHRAE zones 4 and warmer.
How does this compare to Lennox or Carrier equivalents? +
Goodman positions as the value alternative. Lennox and Carrier comparable units often cost 30 to 40 percent more for slightly higher SEER ratings and expanded warranties. This unit sacrifices brand prestige but delivers solid performance at measurable savings.
What happens if I need warranty service? +
Register online immediately after installation. Submit claims to Online Supply with proof of purchase and professional installation documentation. Parts ship within 5 to 7 business days. Labor and refrigerant charges fall to the homeowner or contractor.

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