Independent Review · Updated June 2026

3 Ton 17 SEER 97% AFUE 80,000 BTU Goodman Gas Furnace and Air Conditioner System - Downflow

97% AFUE furnace paired with 18 SEER2 cooling for high-efficiency dual comfort

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 80,000 BTU Goodman Gas Furnace and Air Conditioner System - Downflow
Current Price
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// Bottom Line
This system excels for homeowners in mixed climates who prioritize heating efficiency without sacrificing cooling performance. The 97% AFUE furnace and 18 SEER2 air conditioner combination delivers meaningful energy savings year-round, especially valuable in regions with balanced heating and cooling seasons.

Review

The Goodman 3-ton gas furnace and air conditioner system represents a competent mid-range offering for contractors and homeowners seeking balanced heating and cooling performance. This downflow configuration fits standard closet installations, making it practical for retrofit work. The system combines Goodman's established manufacturing reputation with solid efficiency ratings that appeal to energy-conscious buyers willing to invest moderately above baseline equipment.

Heating performance reaches 80,000 BTU with a remarkable 97% AFUE rating, meaning nearly all fuel converts to usable heat. Cooling delivers 35,000 BTU at 18 SEER2 efficiency through a scroll compressor with two-stage operation. The modulating burner adjusts output continuously rather than cycling on-off, reducing temperature swings. Variable-speed ECM blower motor dynamically adjusts airflow between 0 and 1,600 CFM, optimizing efficiency across different operating conditions.

Pros & Cons

Pros

  • 97% AFUE furnace efficiency is exceptional, reducing heating fuel costs significantly compared to standard 80-90% units
  • 18 SEER2 rating and two-stage compressor deliver superior cooling efficiency and quieter operation at 71 dB
  • Modulating burner adjusts heating output in real-time, improving comfort and reducing energy waste
  • Variable-speed ECM blower motor runs at optimal speeds for different conditions, enhancing efficiency
  • PVC exhaust compatibility simplifies installation compared to metal-only alternatives
  • Energy Star certified with 10-year warranty plus online registration benefits

Cons

  • Spec sheet shows conflicting tonnage data, listing both 3-ton and 5-ton capacity which creates confusion for sizing verification
  • 35 amp maximum breaker requirement demands proper electrical infrastructure that older homes may lack
  • No pricing transparency provided, making value comparison against competitors difficult

Who Should Buy

Best For

Homeowners in temperate climates where both heating and cooling run frequently throughout the year will see the best ROI. This system is ideal for retrofit applications where maximizing efficiency on existing ductwork is essential.

Consider Alternatives If

Homes in predominantly cold climates should consider furnace-focused systems instead, as the cooling capacity may go underutilized. Those with electrical limitations or tight budgets should explore single-stage alternatives.

3 Ton 17 SEER 97% AFUE 80,000 BTU Goodman Gas Furn
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Installation

Installation suits both upflow and downflow applications with right-side flue positioning. The system uses standard 3/8-inch liquid and 7/8-inch suction line connections with sweat valve fittings. PVC exhaust compatibility is a significant advantage over metal-only requirements. R410A refrigerant requires certified technicians. Electrical needs fall between 21.9 and 35 amps, requiring proper breaker sizing.

Warranty & Reliability

Ten-year comprehensive coverage applies upon online registration, protecting against manufacturing defects. Coverage includes compressor and heat exchanger failures. Registration is straightforward and extends protection at no additional cost. This warranty length matches industry standards for mid-tier equipment, offering reasonable risk mitigation without premium pricing.

Specifications

SKUCAPT4961C4
Brand/ManufacturerGoodman
Cooling BTU35,000
Heating BTU80,000
RefrigerantR410A
Electrical115 V. 1 Phase 60 Hz
Warranty10 Years with Online Registration
Decibel Level (dBA)71
Weight (in lbs)73.000000
FeatureSpec
Energy StarYes
SEER1 (Efficiency)18
Condenser StagesTwo Stage
Compressor TypeScroll
Liquid Valve Size3/8"
Suction Valve Size7/8"
Max Breaker Size35 amps
Min. Breaker Size21.9 amps
Tonnage5 Ton
Valve TypeSweat
Height30"
Width21"
Depth21"
ResourcesCAPT Installation Manual CAPT 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 Number7424271
Airflow DirectionDownflow/Horizontal
Exhaust Flue RequirementPlastic / PVC
Product FeaturesRebate Available
Furnace Efficiency / AFUE97%
Blower MotorVariable Speed - ECM
Maximum CFM1600
ConfigurationUpflow / Downflow
Flue LocationRight
Burner StagesModulating
Fuel TypePropane, Natural Gas
Liquid Line3/8"
Suction Line7/8"
StyleA-Coil

Frequently Asked Questions

Why does the specification sheet list both 3-ton and 5-ton capacity? +
The product title states 3-ton cooling while specs show 5-ton tonnage. This discrepancy appears to be a data entry error. Verify the actual AHRI certificate 7424271 with your installer to confirm true capacity, as sizing errors directly impact comfort and efficiency.
Can I install this system in a tight basement space? +
Yes. At 30 inches tall and 21 inches wide and deep, it fits standard closet dimensions. Downflow configuration works well for basement installations. Ensure 3-foot clearance around the unit for airflow and servicing, plus adequate space for ductwork connections.
How much will this system reduce my heating bills compared to an 80% AFUE furnace? +
A 97% AFUE unit converts 17 percentage points more fuel to heat. On an 80,000 BTU furnace running throughout winter, this typically saves 15-25% on heating costs depending on climate and usage patterns. Actual savings vary by utility rates and insulation quality.
How does the 18 SEER2 rating compare to budget air conditioners? +
Standard units achieve 13-14 SEER2. This 18 SEER2 model uses two-stage cooling and scroll compression to run more efficiently. Expect 25-30% lower summer cooling costs versus baseline equipment, though upfront cost is higher.
What happens if I don't register the warranty online? +
Goodman requires online registration within 30 days to activate the full 10-year protection. Without registration, warranty coverage may be reduced or limited. Complete registration immediately after installation to ensure full coverage.

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