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 2.5-ton system with 96% AFUE and 16 SEER1 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 96% AFUE 40,000 BTU Goodman Gas Furnace and Air Conditioner System - Horizontal
Current Price
$115
Check Price at HVACDirect → Shop Now at HVACDirect
Authorized dealer · Full manufacturer warranty
// Bottom Line
This Goodman system is built for budget-conscious homeowners and contractors who need solid efficiency without premium pricing. At $115 for a 96% AFUE furnace paired with a 16 SEER1 air conditioner, it delivers measurable savings on both heating and cooling without cutting corners on performance.

Review

This 2.5-ton Goodman system represents a rare convergence of performance and affordability in the commodity HVAC market. Online Supply positions it as a volume play, moving high-efficiency equipment at contractor-friendly pricing. The unit combines a gas furnace with matching air conditioner coil, making it a complete solution for new construction or full system replacement. Goodman's reputation for straightforward engineering means fewer premium-priced features and more direct functionality.

The furnace delivers 40,000 BTU of heating with 96% AFUE efficiency, meaning only 4% of energy input is wasted up the flue. On the cooling side, the 29,000 BTU capacity and 16 SEER1 rating indicate solid seasonal efficiency. The variable-speed ECM blower motor handles flow up to 1200 CFM and adjusts automatically based on demand, reducing cycles and improving dehumidification. Two-stage burner operation enhances part-load efficiency during mild weather, which matters significantly in temperate climates.

Pros & Cons

Pros

  • 96% AFUE furnace efficiency means minimal heating waste, translating to lower winter utility bills for gas heat users
  • 16 SEER1 rating on the air conditioner exceeds ENERGY STAR requirements and qualifies for rebates in many states
  • Variable-speed ECM blower motor automatically adjusts airflow, improving comfort and reducing runtime energy consumption
  • Two-stage burner provides better modulation for improved temperature control and efficiency during mild heating days
  • 10-year parts warranty with online registration offers solid protection against manufacturing defects

Cons

  • Single-stage compressor lacks the efficiency gains of variable-capacity cooling on partial-load days
  • 71.5 dB noise level is moderately loud, especially during full-load operation, which some homeowners may find intrusive
  • Downflow/horizontal configuration limits placement flexibility compared to upflow or vertical designs

Who Should Buy

Best For

Contractors installing systems in budget-conscious residential projects where efficiency matters will find strong value here. Homeowners in moderate climates who run their AC seasonally and need dependable heating will see payback on higher efficiency within 3-5 years through lower utility costs.

Consider Alternatives If

Anyone prioritizing whisper-quiet operation or needing variable-capacity compressor staging should explore higher-tier systems, as the single-stage compressor and 71.5 dB output may disappoint.

2.5 Ton 15 SEER 96% AFUE 40,000 BTU Goodman Gas Fu
$115
Buy at HVACDirect →

Installation

This downflow/horizontal A-coil unit requires adequate clearance for 50-foot suction line insulation and 3/8 inch liquid line connections. Electrical demands are straightforward, 115V single-phase 60Hz with a 17.1 to 25-amp breaker range. The plastic/PVC exhaust flue requirement simplifies venting in many existing homes. Most contractors can complete installation in one day, and the 30-pound weight prevents handling challenges.

Warranty & Reliability

Goodman provides a 10-year parts warranty when registered online. This coverage is standard in the mid-tier market and protects against compressor, coil, and blower motor failure. Registration is straightforward and typically completed during commissioning. The warranty is non-transferable in most cases, so verify with Goodman if you purchase a second-hand unit.

Specifications

SKULS38783850
Brand/ManufacturerOnline Supply
Cooling BTU29,000
Heating BTU40,000
RefrigerantR410A
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
Height34.5"
Width17.5"
Depth28.75"
ResourcesGoodman Brochure Goodman Installation Instructions Goodman Parts Manual Goodman Service Manual Goodman Specifications Goodman Technical Information Goodman User 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.
ConfigurationDownflow/Horizontal
Liquid Line3/8"
Suction Line7/8"
StyleA-Coil
AHRI Certificate Number7368837
Airflow DirectionDownflow/Horizontal
Exhaust Flue RequirementPlastic / PVC
Product FeaturesRebate Available
Furnace Efficiency / AFUE96%
Blower MotorVariable Speed - ECM
Maximum CFM1200
Burner StagesTwo
Fuel TypePropane, Natural Gas
Suction Line Insulation Thickness3/4"
Length50 feet

Frequently Asked Questions

How does 16 SEER1 compare to typical air conditioner efficiency? +
SEER1 rating of 16 places this unit well above the federal minimum of 13 SEER and qualifies it as ENERGY STAR certified. It means approximately 16 BTU of cooling output per watt of electrical input. Compared to older 10 SEER systems, expect 35-40% lower cooling energy consumption over the season.
What electrical work is needed before installation? +
A dedicated 240V circuit for the outdoor condenser and 115V 60Hz power for the indoor furnace/blower are required. Breaker sizing ranges from 17.1 to 25 amps. Have a licensed electrician verify your home's panel capacity and run new circuits if needed. Most homes built after 1990 accommodate this without upgrades.
Will the two-stage burner significantly reduce heating costs? +
Two-stage burners modulate between high and low fire, improving efficiency on mild winter days when full 40,000 BTU capacity isn't needed. Combined with 96% AFUE, expect 20-30% lower heating costs versus single-stage systems. The savings are most pronounced in moderate climates rather than extreme cold regions.
How does single-stage compressor cooling compare to variable-capacity units? +
Single-stage compressors run at full capacity or off, while variable-capacity units ramp output. This unit is sufficient for standard residential cooling but will cycle more frequently on mild days. You'll see higher efficiency from variable-capacity designs, but the $115 price tag reflects this trade-off.
Is the 10-year warranty transferable if I sell my home? +
Goodman's standard policy limits transferability. Check the warranty document at purchase, as some regional dealers offer extended transferable coverage. Registration is required and should be completed within 60 days of installation to activate coverage.

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