Independent Review · Updated June 2026

2.5 Ton 15 SEER 80% AFUE 100,000 BTU Goodman Gas Furnace and Air Conditioner System - Upflow

Energy Star rated split system with solid efficiency at an aggressive price point

8.2
IndustrialRank Score
Efficiency
8.5
Reliability
7.8
Value
8.0
Installation
8.5
Warranty
8.0
2.5 Ton 15 SEER 80% AFUE 100,000 BTU Goodman Gas Furnace and Air Conditioner System - Upflow
Current Price
$115
Check Price at HVACDirect → Shop Now at HVACDirect
Authorized dealer · Full manufacturer warranty
// Bottom Line
This Goodman system works best for budget-conscious homeowners and contractors in moderate climates who want Energy Star certification without premium pricing. The 80% AFUE furnace and 16 SEER2 air conditioner deliver reasonable operating costs for the investment required.

Review

The Goodman 2.5 Ton split system occupies a practical middle ground in the residential HVAC market. At $115 for the condenser unit alone, pricing is competitive for contractors stocking replacement inventory. The system combines a gas furnace with air conditioner capability in an upflow A-coil configuration suitable for attic or basement installations. Energy Star certification signals baseline compliance with current efficiency standards, though Goodman's reputation focuses more on durability than cutting-edge performance.

The specs reveal an interesting discrepancy worth noting. The condenser carries a 3.5 Ton capacity with 29,000 cooling BTU and 16 SEER2 efficiency, while the furnace delivers 100,000 BTU at 80% AFUE. The high-efficiency multi-speed blower motor handles up to 2,000 CFM, adapting airflow to actual cooling and heating demands. Two-stage burners reduce energy waste during mild weather. Electrical requirements are modest at 120V single-phase with a 17.1 to 25 amp breaker range, simplifying installation on standard household circuits.

Pros & Cons

Pros

  • 16 SEER2 rating exceeds the 15 SEER spec, delivering better cooling efficiency than advertised
  • 80% AFUE furnace is standard baseline efficiency with two-stage burners for better part-load performance
  • Energy Star certified, qualifying for utility rebates in many regions
  • High-efficiency multi-speed blower motor improves comfort and reduces runtime costs
  • A-coil configuration with upflow design fits most residential installations easily
  • Includes comprehensive documentation with installation, service, and technical manuals

Cons

  • Tonnage mismatch: listed as 3.5 Ton condenser but marketed as 2.5 Ton system, creating specification confusion
  • 80% AFUE is entry-level, not high-efficiency; 90%+ AFUE systems offer better long-term savings
  • Single-stage compressor cycles on/off rather than modulating, reducing efficiency at partial loads
  • 71.5 dB noise level is moderately loud during operation, which some homeowners find intrusive

Who Should Buy

Best For

Contractors building budget-conscious replacement systems and homeowners in moderate climates wanting Energy Star efficiency without premium costs. This system makes financial sense where utility rebates offset the modest efficiency gains from higher-tier units.

Consider Alternatives If

Anyone prioritizing quiet operation, those in hot climates needing maximum cooling efficiency, or builders targeting high-efficiency premium markets should explore variable-capacity units or systems rated 18+ SEER2.

2.5 Ton 15 SEER 80% AFUE 100,000 BTU Goodman Gas F
$115
Buy at HVACDirect →

Installation

Installation requires metal flue venting for the furnace exhaust and proper refrigerant line sizing with 3/4-inch insulation on the 7/8-inch suction line. The A-coil accepts both 3/8-inch liquid and 7/8-inch suction connections. Upflow configuration means the unit can mount vertically in attics or utility closets. Field technicians should verify the condenser and furnace tonnage match before commissioning to avoid capacity mismatches that reduce efficiency.

Warranty & Reliability

Goodman covers the system for 10 years with online registration required. This standard warranty protects against manufacturing defects and component failures, though it does not cover maintenance or wear items like capacitors. Registration is quick and extends coverage significantly compared to unregistered units. Always retain documentation proving registration for warranty claims.

Specifications

SKULS38783850
Brand/ManufacturerOnline Supply
Cooling BTU29,000
Heating BTU100,000
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
Height34.5"
Width21"
Depth28.75"
ResourcesGoodman Brochure Goodman Installation Manual Goodman Specifications Goodman Parts Manual Goodman User Information Goodman Service Manual Goodman Technical Information Goodman 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.
ConfigurationUpflow/Horizontal
Liquid Line3/8"
Suction Line7/8"
StyleA-Coil
Airflow DirectionUpflow/Horizontal
Exhaust Flue RequirementMetal
Furnace Efficiency / AFUE80%
Blower MotorHigh Efficiency Multi-Speed
Maximum CFM2000
Burner StagesTwo
Fuel TypeGas
Suction Line Insulation Thickness3/4"
Length50 feet

Frequently Asked Questions

Why does the spec sheet list 3.5 Ton but the product title says 2.5 Ton? +
The condenser unit itself is rated 3.5 Ton capacity with 29,000 BTU cooling output. The 2.5 Ton designation likely refers to the furnace-matched configuration. This mismatch creates confusion for contractors, so verify tonnage sizing matches your actual heating and cooling load calculations before ordering multiple units.
Can I install this in a horizontal position despite the upflow rating? +
The configuration lists upflow/horizontal capability, meaning the A-coil can accept air from multiple directions. However, check local codes and consult the installation manual for specific orientation requirements. Improper positioning can trap refrigerant or oil, reducing efficiency and component lifespan.
How much will the 80% AFUE furnace cost compared to a 90% model? +
80% AFUE systems typically cost $500 to $800 less than 90%+ units. However, 90% AFUE recovers that difference within 6 to 8 years through lower gas bills, depending on climate and usage. Cold-climate homeowners benefit most from higher efficiency ratings.
Is 16 SEER2 considered good efficiency for a 2.5 Ton unit today? +
16 SEER2 exceeds minimum standards and qualifies for Energy Star, but modern systems reach 18 to 22 SEER2. For moderate climates, 16 SEER2 provides reasonable cooling costs. Hot climates justify the premium for variable-capacity 20+ SEER2 systems despite higher upfront investment.
What does the 10-year warranty actually cover? +
Manufacturing defects and component failures within 10 years with online registration. Warranty excludes normal wear, maintenance, installation errors, and damage from improper charging or servicing. Keep receipts and registration proof for all claims.

Affiliate disclosure: IndustrialRank earns a commission on qualifying purchases at no extra cost to you. We only recommend products we have independently reviewed.