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 gas furnace and AC combo with 96% AFUE and 16 SEER1 rating

7.8
IndustrialRank Score
Efficiency
8.6
Reliability
7.5
Value
7.2
Installation
8.2
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 unit delivers exceptional heating and cooling efficiency for homeowners in mixed climates seeking a complete system replacement. It's ideal for horizontal installations in basements or attics where space and airflow direction matter.

Review

Goodman's 2.5-ton combined gas furnace and air conditioning system targets homeowners seeking matched equipment with above-average efficiency ratings. This horizontal configuration suits basements, attics, or utility closets where space constraints exist. The unit bundles heating and cooling into one system, simplifying installation and warranty management. Online Supply's offering includes both the furnace and condenser coil, eliminating concerns about component compatibility.

The furnace delivers 40,000 BTU of heating output at 96% AFUE, placing it in the high-efficiency category for gas furnaces. The AC side generates 29,000 cooling BTU with a 16 SEER1 rating, exceeding typical 2.5-ton performance. Two-stage burners and an ECM multi-speed blower motor provide modulating capacity, reducing runtime and energy consumption. The unit operates at 71.5 decibels and requires 115V single-phase power, making it compatible with standard household electrical service.

Pros & Cons

Pros

  • 96% AFUE furnace efficiency means lower heating bills compared to standard 80-85% units
  • 16 SEER1 rating on the AC side exceeds the 2.5-ton specification, suggesting strong cooling performance
  • Two-stage burner and multi-speed ECM blower motor provide responsive temperature control and quieter operation
  • Energy Star certified, qualifying for some utility rebates and tax credits
  • 10-year warranty with online registration covers parts and labor protection

Cons

  • Specs show conflicting tonnage claims, 2.5 tons in title versus 3 tons listed in specifications, creating confusion about actual capacity
  • Cooling BTU rated at 29,000 doesn't align with standard 2.5-ton output of 30,000 BTU, suggesting possible downrating or data entry error
  • 71.5 dB noise level is moderate to loud, noticeably audible during operation in living spaces
  • Requires professional installation due to refrigerant handling, electrical work, and gas line requirements

Who Should Buy

Best For

Homeowners replacing aging furnaces or complete HVAC systems in homes with basement or attic space suitable for horizontal mounting. This unit works well for those prioritizing long-term efficiency savings and wanting both heating and cooling from one matched system.

Consider Alternatives If

Anyone needing a precise 2.5-ton unit should verify actual specifications before purchase, as the conflicting tonnage ratings raise questions about the equipment's true capacity and intended application.

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

Professional installation is mandatory for this system. The unit requires gas line connections, refrigerant charge verification, electrical work, and proper flue installation using plastic or PVC piping. Suction and liquid lines measure 7/8 inches and 3/8 inches respectively, with 50-foot line sets available. Horizontal mounting demands careful ductwork planning and return air configuration to maximize the 800 CFM blower capacity.

Warranty & Reliability

Coverage includes a 10-year parts and labor warranty upon online registration. This extended term reflects Goodman's confidence in durability and provides significant protection against compressor or heat exchanger failure. Homeowners should complete registration promptly to activate coverage. The warranty does not cover refrigerant, maintenance, or damage from improper installation.

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.
Airflow DirectionUpflow/Horizontal
Exhaust Flue RequirementPlastic / PVC
Furnace Efficiency / AFUE96%
Blower MotorMulti-Speed - ECM
Maximum CFM800
ConfigurationHorizontal
Flue LocationRight
Burner StagesTwo
Fuel TypeGas
Liquid Line3/8"
Suction Line7/8"
StyleA-Coil
Suction Line Insulation Thickness3/4"
Length50 feet

Frequently Asked Questions

Does this unit support both R410A and R22 refrigerant? +
Yes, the specifications indicate compatibility with R410A or R22 refrigerant. However, R22 is being phased out. Most installers will charge this unit with R410A. Confirm refrigerant type with your installer before purchase, as it affects cost and availability if future servicing becomes necessary.
Can this system fit in a standard basement ceiling? +
The horizontal configuration measures 21.125 inches tall, 17.5 inches wide, and 26 inches deep. Most basements with 24-inch joist spacing cannot accommodate this depth. Verify your available space before ordering. Vertical or attic installation may be necessary for some homes.
How much will this unit reduce my heating and cooling bills? +
The 96% AFUE furnace can save 10-15% on heating costs compared to 80% units. The 16 SEER1 AC provides 20-30% savings versus older 10 SEER equipment. Actual savings depend on local energy rates, climate, insulation quality, and usage patterns. Ask your installer for specific projections.
Is this a true 2.5-ton unit or 3-ton? +
The product title states 2.5 tons, but the specifications list 3 tons with 29,000 cooling BTU. This discrepancy should concern buyers. Contact the seller for clarification before purchasing. This confusion could affect rebate eligibility and system sizing accuracy.
What electrical service does this require? +
The unit needs 115V single-phase 60 Hz power with a minimum 17.1-amp breaker and maximum 25-amp breaker. Most homes have adequate capacity. Your electrician should verify breaker availability and wire gauge during the site assessment.

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