Independent Review · Updated June 2026

2.5 Ton 15 SEER 96% AFUE 40,000 BTU Goodman Gas Furnace and Air Conditioner System - Horizontal

High-efficiency dual-fuel system with variable-speed blower and strong heating output.

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 40,000 BTU Goodman Gas Furnace and Air Conditioner System - Horizontal
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// Bottom Line
This Goodman system excels for contractors installing horizontal configurations in tight spaces, offering 96% AFUE heating efficiency and SEER1 16 cooling in a compact footprint. The variable-speed ECM blower and two-stage burner make it ideal for properties needing responsive temperature control without excessive noise.

Review

The Goodman 2.5-ton horizontal system bridges affordability and performance in the mid-range HVAC market. Designed for tight installations, this unit measures just 21.125 inches tall while delivering 40,000 BTU heating and 29,000 BTU cooling. It's positioned as a practical choice for contractors handling retrofit jobs or new builds where space constraints matter, combining established Goodman reliability with modern efficiency standards that attract both cost-conscious homeowners and builders.

Performance data shows genuine efficiency gains across both heating and cooling. The 96% AFUE rating means nearly all fuel converts to usable heat, while the SEER1 16 rating exceeds typical 2.5-ton expectations. The variable-speed ECM blower adjusts output to match demand, reducing runtime waste and noise. Two-stage burner modulation prevents short-cycling in mild weather. Scroll compressor technology and PVC flue compatibility simplify installation in modern homes. Sound levels at 71.5 dB are competitive for this tonnage class.

Pros & Cons

Pros

  • 96% AFUE furnace efficiency delivers exceptional heating performance with 40,000 BTU output and two-stage burner for modulated operation
  • SEER1 rating of 16 significantly exceeds the 2.5-ton specification listed in title, providing better-than-expected cooling efficiency
  • Variable-speed ECM blower motor with 1200 CFM maximum handles airflow smoothly while reducing energy waste and operational noise
  • Compact horizontal design at 21.125 inches tall fits challenging installations where vertical clearance is limited
  • Dual-fuel capability supports both natural gas and propane, offering flexibility for rural or propane-dependent properties
  • Energy Star certified with 10-year warranty and AHRI certificate 7368841 for verified performance data

Cons

  • Single-stage cooling compressor cannot modulate capacity, leading to less efficient part-load operation compared to two-stage units
  • Weight specification of 30 pounds appears underreported for a complete 3-ton system, suggesting potential data entry error in product listing
  • 115V single-phase electrical requirement requires dedicated 17.1 to 25-amp circuit, limiting retrofit options in some older homes with insufficient panel capacity
  • R410A refrigerant requires proper recovery and handling, adding complexity and cost to future service calls

Who Should Buy

Best For

Contractors installing horizontal split systems in basements, crawlspaces, or attics where vertical space is precious will appreciate this unit's compact dimensions. Homeowners in mixed-fuel areas seeking reliable heating and efficient cooling at a moderate price point will find strong value in the 96% AFUE and variable-speed blower combination.

Consider Alternatives If

Properties with severe electrical panel limitations or older homes without adequate 20+ amp circuits should explore alternatives, and buyers prioritizing ultra-quiet operation may want two-stage cooling units despite higher cost.

2.5 Ton 15 SEER 96% AFUE 40,000 BTU Goodman Gas Fu
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Installation

Horizontal configuration requires proper condensate drainage planning, typically sloping toward a floor drain or pump. Supply lines use standard 3/8 inch liquid and 7/8 inch suction connections with 3/4 inch suction insulation for first 50 feet included. PVC plastic flue venting simplifies ductwork versus metal alternatives. Electrical needs 115V single-phase at 17.1 to 25 amps, requiring dedicated breaker. Most experienced HVAC techs complete installation in 6-8 hours.

Warranty & Reliability

Ten-year parts coverage applies with online registration at no additional cost. This standard protection covers compressor, coil, and blower components against manufacturing defects. Note that labor and refrigerant are typically not included in Goodman's base warranty. Registration is straightforward and extends coverage period from installation date. For commercial or rental properties, verify warranty terms as some restrictions may apply.

Specifications

SKULS38783850
Brand/ManufacturerOnline Supply
Cooling BTU29,000
Heating BTU40,000
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 Ton
Height21.125"
Width17.5"
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 Number7368841
Airflow DirectionUpflow/Horizontal
Exhaust Flue RequirementPlastic / PVC
Product FeaturesRebate Available
Furnace Efficiency / AFUE96%
Blower MotorVariable Speed - ECM
Maximum CFM1200
ConfigurationHorizontal
Burner StagesTwo
Fuel TypePropane, Natural Gas
Liquid Line3/8"
Suction Line7/8"
StyleA-Coil
Suction Line Insulation Thickness3/4"
Length50 feet

Frequently Asked Questions

Why does the spec sheet list 3 tons but the title says 2.5 tons? +
The tonnage mismatch appears to be a data discrepancy in the product listing. AHRI certificate 7368841 should clarify actual rated capacity. Contact the seller to confirm whether this is 2.5-ton or 3-ton equipment, as this affects pricing, efficiency metrics, and suitability for your home.
Can I install this in an attic with low headroom? +
Yes. At 21.125 inches tall, this horizontal unit fits most attic spaces with 24 inches or more clearance. Ensure adequate return airflow around the unit and verify your electrical panel supports the 17.1 to 25-amp breaker requirement before installation.
How does 96% AFUE compare to newer furnaces? +
96% AFUE is excellent and near the maximum achievable without condensing technology. Most new furnaces max out around 95-98% AFUE. This unit delivers nearly one dollar of heat per dollar of fuel, making it among the most efficient gas furnaces available at standard pricing.
Should I choose this over a 16 SEER2 heat pump? +
Heat pumps excel in moderate climates but struggle below 30-35 degrees. In cold regions, this furnace's 96% AFUE and dual-fuel capability may provide better comfort and lower winter costs. Compare year-round energy bills for your climate zone rather than cooling efficiency alone.
Is the 10-year warranty transferable if I sell my home? +
Goodman typically offers limited transferability on extended warranties, though coverage does pass to new owners in most cases. Register the unit immediately upon installation and retain documentation to ensure valid claims if ownership changes.

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