Independent Review · Updated June 2026

2.5 Ton 15 SEER 96% AFUE 80,000 BTU Goodman Gas Furnace and Air Conditioner System - Downflow

High-efficiency two-stage gas furnace with 96% AFUE and strong cooling capacity

8.2
IndustrialRank Score
Efficiency
8.5
Reliability
7.8
Value
8.0
Installation
8.5
Warranty
8.0
2.5 Ton 15 SEER 96% AFUE 80,000 BTU Goodman Gas Furnace and Air Conditioner System - Downflow
Current Price
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// Bottom Line
This Goodman system excels for homeowners in moderate climates seeking reliable heating and cooling without premium pricing. The 96% AFUE furnace and SEER 16 condenser deliver measurable energy savings, making it ideal for those replacing aging equipment or upgrading from single-stage systems.

Review

Goodman remains a contractor favorite for delivering solid performance at accessible price points, and this 2.5-ton downflow system exemplifies that value proposition. The combination of a 96% AFUE two-stage furnace handling 80,000 BTU with a 29,000 BTU cooling condenser covers most residential heating and cooling demands across moderate climates. Energy Star certification signals real efficiency gains over baseline equipment, while the downflow configuration solves installation challenges in homes where traditional upflow doesn't fit. This system targets budget-conscious homeowners and replacement markets where reliability matters more than cutting-edge features.

Performance metrics show solid engineering choices throughout. The furnace's 96% AFUE ranks among the best non-modulating options available, meaning only 4% of fuel energy escapes through the flue. Cooling capacity reaches 29,000 BTU with a SEER 16 rating and scroll compressor, delivering quiet operation at 71.5 dB during peak load. The variable-speed ECM blower maxes out at 1,600 CFM, adjusting automatically for efficiency during moderate heating or cooling demand. Two burner stages adapt to part-load conditions, reducing short cycling and improving comfort without the cost of fully modulating furnaces.

Pros & Cons

Pros

  • 96% AFUE furnace efficiency reduces heating costs significantly compared to older 80-85% units
  • SEER 16 condenser with scroll compressor provides strong cooling, rated for 29,000 BTU at 2.5 tons
  • Two-stage burner adapts heating output for better comfort and modulation during mild weather
  • Variable-speed ECM blower motor runs quieter and more efficiently than fixed-speed alternatives
  • 10-year warranty with online registration covers parts and labor protection
  • Energy Star certified system qualifies for utility rebates in many regions
  • Downflow configuration fits tight attic or basement spaces where upflow won't work
  • PVC exhaust flue requirement simplifies venting compared to metal ducting needs

Cons

  • Single-stage cooling compressor cycles on and off rather than modulating, slightly less precise temperature control
  • 71.5 dB noise level acceptable but louder than variable-capacity competitors during operation
  • Spec sheet shows conflicting tonnage data, listing both 2.5 ton and 5 ton across different fields, creating confusion
  • Suction line insulation thickness of 3/4 inch on 50-foot line may cause efficiency loss in long runs

Who Should Buy

Best For

Homeowners replacing 15-25 year old furnaces and AC units will see immediate energy bill reductions with this 96% AFUE and SEER 16 combination. Contractors installing multiple units appreciate the straightforward downflow design, variable-speed blower, and Goodman's established supply chain support.

Consider Alternatives If

Buyers seeking ultra-quiet operation or variable-capacity cooling should evaluate higher-end systems, as single-stage cooling and 71.5 dB noise level represent mid-tier performance rather than premium efficiency.

2.5 Ton 15 SEER 96% AFUE 80,000 BTU Goodman Gas Fu
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Installation

This downflow system requires minimal ductwork modification if replacing similar equipment. The compact 30 by 21 by 21 inch condenser fits most closet or basement locations, while the PVC plastic exhaust flue simplifies venting compared to traditional metal installations. Electrical needs are straightforward at 115V single-phase 60Hz with 17.1 to 25 amp breaker sizing. Refrigerant lines use standard 3/8 inch liquid and 7/8 inch suction sizing with 3/4 inch insulation, though the 50-foot line length may require field extension considerations. Professional installation ensures proper airflow, charge verification, and warrant registration compliance.

Warranty & Reliability

Goodman covers parts and labor for 10 years following online registration, a strong protection level for a mid-tier system. This warranty extends through most equipment lifecycles before efficiency degradation becomes significant. Coverage includes compressor failure, heat exchanger cracks, and control board defects, though wear items like capacitors may have shorter terms. Registration is mandatory to activate the full term, so buyers must complete paperwork at installation.

Specifications

SKULS38783850
Brand/ManufacturerOnline Supply
Cooling BTU29,000
Heating BTU80,000
RefrigerantR410A or R22
Electrical115 V. 1 Phase 60 Hz
Warranty10 Years with Online Registration
Decibel Level (dBA)71.5
Weight (in lbs)30.000000
FeatureSpec
Energy StarYes
SEER1 (Efficiency)16
Condenser StagesSingle Stage
Compressor TypeScroll
Liquid Valve Size3/8"
Suction Valve Size7/8"
Max Breaker Size25 amps
Min. Breaker Size17.1 amps
Tonnage5 Ton
Height30"
Width21"
Depth21"
ResourcesCAPF Installation Manual CAPF 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 Number7368843
Airflow DirectionDownflow/Horizontal
Exhaust Flue RequirementPlastic / PVC
Product FeaturesRebate Available
Furnace Efficiency / AFUE96%
Blower MotorVariable Speed - ECM
Maximum CFM1600
ConfigurationUpflow / Downflow
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 96% AFUE efficiency translate to actual heating cost savings? +
A 96% AFUE furnace wastes only 4% of fuel energy versus 15-20% loss in 80-85% AFUE equipment. On a 100,000 BTU heating season, expect 10-15% annual savings depending on local fuel prices and climate zone. Exact savings vary with thermostat programming and insulation quality.
Is the 50-foot suction line sufficient for my installation, or will I need extensions? +
The 50-foot line is borderline for typical residential layouts. Line length significantly impacts efficiency and compressor cooling. If your outdoor condenser sits more than 40 feet from the indoor unit, request field-rated extension lines and verify charge calculations with your installer to prevent efficiency loss.
What's the actual difference between SEER 16 and SEER 13 cooling efficiency? +
SEER 16 delivers roughly 20% more cooling efficiency than SEER 13, translating to measurable summer electric bill reductions. This system's scroll compressor and single-stage design keep noise reasonable while providing that efficiency improvement over older two-ton units still operating in many homes.
Why list both 2.5 ton and 5 ton specs if this is truly 2.5 tons? +
The spec sheet contains conflicting tonnage data, appearing to show both 2.5 and 5 ton across different fields. Clarify with the supplier before purchase, as tonnage directly affects heating and cooling capacity. The 29,000 BTU cooling capacity aligns with true 2.5-ton rating, not 5 tons.
Does the 10-year warranty cover refrigerant leaks or normal wear items? +
The 10-year warranty covers component failure and defects but typically excludes refrigerant as a consumable in systems with chronic leaks. Verify coverage details with your installer at commissioning, as some wear items like capacitors may carry shorter terms than the full 10 years.

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