Independent Review · Updated June 2026

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

Energy Star 80% AFUE furnace paired with 16 SEER2 AC delivers solid efficiency

7.8
IndustrialRank Score
Efficiency
8.2
Reliability
7.9
Value
7.5
Installation
8.1
Warranty
8.0
2.5 Ton 15 SEER 80% AFUE 80,000 BTU Goodman Gas Furnace and Air Conditioner System - Upflow
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// Bottom Line
This Goodman system works well for homeowners upgrading from older equipment who want reliable performance without premium pricing. The 80% AFUE furnace and 16 SEER2 AC handle mid-sized homes efficiently, though the spec sheet shows some conflicting tonnage data worth clarifying before purchase.

Review

Goodman's combination gas furnace and air conditioner system represents the practical middle ground in residential HVAC equipment. Built by a manufacturer with decades of contractor relationships, this upflow configuration handles heating and cooling in one integrated package. The unit targets homeowners seeking reliable performance without stepping into premium efficiency territory. Online Supply offers this system competitively, supported by clear documentation and accessible parts networks that contractors trust.

Performance specs reveal a capable system with some unexplained inconsistencies. The 16 SEER2 cooling efficiency rating actually exceeds the advertised 15 SEER designation, delivering approximately 29,000 BTU cooling capacity in the stated tonnage. The furnace operates at 80% AFUE with 80,000 BTU heating output and two-stage burners that modulate for comfort. Electrical requirements total 120V, 1 phase, 60 Hz with a 17.1 to 25 amp breaker range. The R410A refrigerant and scroll compressor are industry standard, though single-stage operation means full-power cooling cycles on all days.

Pros & Cons

Pros

  • 16 SEER2 rating exceeds the stated 15 SEER claim, delivering better cooling efficiency than advertised
  • 80,000 BTU heating capacity with two-stage burner provides responsive comfort and modulation
  • Energy Star certified system qualifies for utility rebates in many regions
  • High-efficiency multi-speed blower motor with 2,000 CFM max output improves air distribution
  • 10-year warranty with online registration covers major components and provides peace of mind
  • Scroll compressor is proven technology known for durability in residential applications

Cons

  • Spec sheet shows conflicting tonnage data, listing both 2.5 ton and 3.5 ton, which creates confusion for proper sizing
  • 80% AFUE is baseline efficiency for modern gas furnaces, not exceptional, lacks condensing technology for higher efficiency
  • Single-stage compressor means the air conditioner runs at full capacity rather than modulating, using more energy on mild days

Who Should Buy

Best For

Homeowners in moderate climates replacing 15-20 year old systems who want straightforward, dependable performance at reasonable cost. This setup serves well for homes around 2,000-2,500 square feet where mid-range efficiency meets budget constraints.

Consider Alternatives If

Energy-conscious buyers should consider 95% AFUE condensing furnaces and variable-capacity AC units, which cost more but deliver 15-25% better efficiency over the system's life.

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

Installation requires standard split-system setup with 3/8 inch liquid and 7/8 inch suction lines, each up to 50 feet. The compact 30 by 21 by 21 inch footprint suits most mechanical closets or outdoor pads. Metal flue piping handles exhaust, and the upflow/horizontal configuration adapts to various home layouts. Licensed installers should verify the conflicting tonnage ratings before sizing ductwork and matching indoor coils.

Warranty & Reliability

Ten years of parts coverage activates upon online registration, covering compressor, heat exchanger, and sealed components. This protection exceeds the industry standard 5-year limited warranty on many budget units. Registration typically takes minutes and provides valuable documentation for future service calls. Coverage excludes normal maintenance items like filters and refrigerant top-offs.

Specifications

SKULS38783850
Brand/ManufacturerOnline Supply
Cooling BTU29,000
Heating BTU80,000
RefrigerantR410A
Electrical120 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
Tonnage3.5 Ton
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.
Airflow DirectionUpflow/Horizontal
Exhaust Flue RequirementMetal
Furnace Efficiency / AFUE80%
Blower MotorHigh Efficiency Multi-Speed
Maximum CFM2000
ConfigurationUpflow / Downflow
Burner StagesTwo
Fuel TypeGas
Liquid Line3/8"
Suction Line7/8"
StyleA-Coil
Suction Line Insulation Thickness3/4"
Length50 feet

Frequently Asked Questions

Does this system really handle 2.5 tons or 3.5 tons? +
The spec sheet lists conflicting information, 2.5 in the title and 3.5 in the tonnage field. Verify with your installer which capacity matches your home's calculated load before installation. This discrepancy directly affects ductwork sizing and system performance.
Can I install this myself or do I need a licensed contractor? +
EPA regulations require certified refrigerant handling for any split system installation. You'll need a licensed HVAC contractor to charge the system legally. However, experienced DIYers can handle basic mechanical assembly with proper guidance from installation manuals.
How does 80% AFUE compare to newer condensing furnaces? +
At 80% AFUE, roughly 20% of fuel energy exits through the flue. Condensing models reach 95-98% AFUE by capturing exhaust heat. Over 15 years, a 95% AFUE furnace saves $400-600 annually in gas costs, offsetting its higher initial price.
Is 16 SEER2 enough efficiency for hot climates? +
16 SEER2 is competent for most climates but mid-range for hot regions. Variable-capacity units reach 18-22 SEER2, reducing runtime on 90+ degree days. However, 16 SEER2 still qualifies for most utility rebates and Energy Star programs.
What does the 10-year warranty actually cover? +
Registration covers compressor, heat exchanger, and sealed refrigerant components. Labor costs typically fall on you. Normal wear items like capacitors and contactors are excluded. Review the complete warranty document from Goodman before purchase.

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