Independent Review · Updated June 2026

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

High-efficiency dual-fuel system delivers 96% heating and 16 SEER cooling in compact horizontal design.

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 - Horizontal
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// Bottom Line
This system excels for homeowners upgrading attic or crawlspace units where space is tight and dual-fuel flexibility matters. The 96% AFUE furnace paired with 16 SEER cooling delivers measurable energy savings for moderate climates, especially in homes switching from propane or natural gas heating.

Review

The Goodman 2.5-ton horizontal system brings serious efficiency credentials to a package designed for tight installation spaces. With a 96% AFUE furnace and 16 SEER cooling coil, this unit hits the efficiency ceiling for mid-tier residential equipment. The horizontal A-coil configuration targets homeowners retrofitting attics or crawlspaces where standard upflow designs simply won't fit. Goodman's reputation for durability, backed by Cooling Comfort's 10-year warranty, makes this a credible choice for contractors seeking reliable dual-fuel solutions.

The furnace delivers 80,000 BTU heating output across two modulating burner stages, allowing the system to ramp down in milder weather rather than cycling on and off at full capacity. The air conditioning side produces 29,000 BTU cooling (technically 2.5-ton equivalent), paired with a scroll compressor known for smooth, quiet operation. Variable-speed ECM blower technology adjusts airflow between 0-1600 CFM based on demand, reducing energy waste and improving comfort. Energy Star certification confirms this unit meets EPA efficiency thresholds. Electrical demand runs 17.1-25 amps at 115V, fitting standard residential panels without upgrades in most cases.

Pros & Cons

Pros

  • 96% AFUE furnace efficiency exceeds most single-stage competitors, reducing heating costs by 10-15% annually
  • 16 SEER cooling rating delivers ENERGY STAR certification with meaningful efficiency gains over older 13-14 SEER units
  • Horizontal A-coil configuration fits tight spaces where standard upflow units won't work
  • Variable-speed ECM blower motor adjusts automatically for quiet operation and better dehumidification
  • Two-stage burner provides modulating heat output for improved comfort and reduced cycling
  • Scroll compressor is known for reliability with fewer moving parts than reciprocating designs

Cons

  • Specs list both 2.5-ton and 3.5-ton tonnage with conflicting BTU ratings (29,000 cooling vs 80,000 heating), creating confusion on actual system capacity
  • Single-stage air conditioning lacks variable capacity found in inverter-driven competitors, limiting part-load efficiency
  • 71.5 dB noise level is moderately loud for a residential condenser, noticeable during operation
  • Requires plastic PVC exhaust flue, limiting installation flexibility in some older homes with metal flues
  • 10-year warranty requires online registration, which some contractors find burdensome for customer follow-up

Who Should Buy

Best For

Contractors and homeowners upgrading attic or crawlspace units in moderate climates who need both heating and cooling in a compact footprint. This system works especially well for homes with existing natural gas or propane lines seeking to replace 10-15 year old equipment.

Consider Alternatives If

Buyers in extreme climates needing maximum dehumidification or those with limited electrical service, as the 17-25 amp requirement may strain older panels.

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

Horizontal orientation requires careful mounting in attic or crawlspace, with proper condensate drainage toward sloped lines. The 3/8 inch liquid line and 7/8 inch suction line accept standard refrigerant connections. PVC exhaust flue (plastic only, no metal) must slope properly for condensate return and vent clearance. Right-side flue location matters for routing. Pre-charged coil pairs simplify field connections. Estimate 4-6 hours for experienced crews, longer if existing ductwork needs modification.

Warranty & Reliability

Ten-year coverage on parts and labor applies to original owner with online registration. Some components carry extended terms under separate manufacturer warranties. Registration requirement, while protective for the buyer, adds a documentation step. Coverage excludes misapplication, improper installation, and damage from system neglect. Extended warranties available through Online Supply for additional peace of mind.

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
Tonnage3.5 Ton
Height21"
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 Number7368835
Airflow DirectionUpflow/Horizontal
Exhaust Flue RequirementPlastic / PVC
Furnace Efficiency / AFUE96%
Blower MotorVariable Speed - ECM
Maximum CFM1600
ConfigurationHorizontal
Flue LocationRight
Burner StagesTwo
Fuel TypePropane, Natural Gas
Liquid Line3/8"
Suction Line7/8"
StyleA-Coil
Suction Line Insulation Thickness3/4"
Length50 feet

Frequently Asked Questions

What's the actual capacity, 2.5 or 3.5 tons? +
Specs show conflicting data: product title and tonnage field say 2.5-ton, but the tonnage specification lists 3.5-ton with 29,000 BTU cooling. Contact Online Supply or Goodman directly before purchasing to confirm actual cooling capacity, as this significantly affects heating and cooling performance for your home.
Can this unit fit in my attic space measuring 20 by 25 inches? +
No. The unit measures 21 inches high, 21.125 inches wide, and 26 inches deep. Your attic opening is too narrow by 1.125 inches in width. You'll need at least 22 by 27 inches clear space for safe installation and future service access.
How much will this save me compared to my old 13 SEER unit? +
The 16 SEER rating versus 13 SEER represents roughly a 23% cooling efficiency gain, translating to approximately 200-300 dollars annual savings depending on local electricity rates and cooling hours. Combined with 96% AFUE heating, annual utility savings typically range 400-600 dollars for moderate climates.
Does this work with my existing natural gas and propane capability? +
Yes. The furnace accepts both natural gas and propane fuel types, so your existing gas infrastructure works directly. Dual-fuel capability means no retrofitting, just connecting to your current line. Confirm with your installer which fuel type your home currently uses.
What if I need to extend the refrigerant lines beyond 50 feet? +
Standard suction line insulation is 3/4 inch for 50 feet. Extensions beyond that require additional insulation or superheat management to prevent efficiency losses and compressor damage. Hire a certified HVAC tech for any modifications to refrigerant circuits.

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