Independent Review · Updated June 2026

3.5 Ton 15 SEER 96% AFUE 100,000 BTU Goodman Gas Furnace and Air Conditioner System - Upflow

High-efficiency dual-fuel system delivering 96% heating and 16 SEER cooling performance

8.2
IndustrialRank Score
Efficiency
8.5
Reliability
7.8
Value
8.0
Installation
8.5
Warranty
8.0
3.5 Ton 15 SEER 96% AFUE 100,000 BTU Goodman Gas Furnace and Air Conditioner System - Upflow
Current Price
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// Bottom Line
This Goodman combo system excels for contractors and homeowners seeking strong heating and cooling efficiency without premium pricing. The 96% AFUE furnace paired with a 16 SEER condenser makes it ideal for moderate climates where both seasons matter equally.

Review

The Goodman 3.5/5 ton upflow system represents solid mid-market positioning in the HVAC landscape. This combo unit bundles a gas furnace with an air conditioning condenser, addressing both seasonal needs without requiring separate units. Goodman maintains strong contractor preference due to straightforward design and reasonable pricing. The upflow configuration suits basements and crawlspace installations common in residential retrofits.

Performance numbers stand out: the furnace delivers 100,000 BTU heating output at 96% AFUE efficiency, while the condenser produces 42,000 BTU cooling at 16 SEER1 with Energy Star certification. The variable-speed ECM blower motor reaches 2,000 CFM maximum, adapting to load conditions for quieter operation. Two-stage burner and scroll compressor design prioritize reliability over modulation, keeping service calls straightforward.

Pros & Cons

Pros

  • 96% AFUE furnace efficiency means lower heating bills with minimal wasted fuel
  • 16 SEER1 cooling rating (Energy Star certified) reduces summer electricity consumption significantly
  • Variable-speed ECM blower motor delivers quiet operation at 73 dB and optimizes comfort
  • Two-stage burner and single-stage compressor provide reliable, straightforward operation
  • 10-year warranty with online registration protects your investment for a decade
  • Accepts both R410A and R22 refrigerant, offering flexibility during service calls

Cons

  • Spec discrepancy: listed as both 3.5 ton and 5 ton, creating confusion about actual capacity
  • 42,000 BTU cooling capacity seems undersized for true 5-ton equipment, raising accuracy concerns
  • Single-stage compressor lacks modulation found in higher-end models, reducing part-load efficiency
  • 73 dB noise level is moderately loud for residential applications, especially during heating cycles

Who Should Buy

Best For

Contractors upgrading residential systems in mixed climates and homeowners replacing aging furnace-AC combinations who prioritize efficiency without paying for variable-speed compressors. Works well for 2,000 to 3,000 square foot homes with moderate heating and cooling demands.

Consider Alternatives If

Buyers needing true 5-ton capacity should verify actual cooling output before purchase, and those in extremely hot climates requiring stronger single-stage cooling performance may want higher tonnage alternatives.

3.5 Ton 15 SEER 96% AFUE 100,000 BTU Goodman Gas F
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Installation

Installation demands standard HVAC knowledge and equipment. The system requires 115V, 1-phase 60 Hz power with 23.5 to 40-amp breaker capacity, typical for most homes. Upflow ducting must accommodate 30 by 21 by 21 inch dimensions. PVC exhaust flue compatibility simplifies venting. Technicians should verify capacity ratings match your home before committing.

Warranty & Reliability

Goodman provides 10-year parts warranty upon online registration, a standard industry offering that covers most component failures. Registration is mandatory to activate coverage, so buyers must complete paperwork promptly after installation. This warranty protects against defects but excludes normal wear, maintenance issues, and installation errors.

Specifications

SKULS381183850
Brand/ManufacturerOnline Supply
Cooling BTU42,000
Heating BTU100,000
RefrigerantR410A or R22
Electrical115 V. 1 Phase 60 Hz
Warranty10 Years with Online Registration
Decibel Level (dBA)73
Weight (in lbs)48.000000
FeatureSpec
Energy StarYes
SEER1 (Efficiency)16
Condenser StagesSingle Stage
Compressor TypeScroll
Liquid Valve Size3/8"
Suction Valve Size7/8"
Max Breaker Size40 amps
Min. Breaker Size23.5 amps
Tonnage5 Ton
Height30"
Width21"
Depth21"
ResourcesCAPF Installation Manual CAPF 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 Number7368836
Airflow DirectionUpflow/Horizontal
Exhaust Flue RequirementPlastic / PVC
Product FeaturesRebate Available
Furnace Efficiency / AFUE96%
Blower MotorVariable Speed - ECM
Maximum CFM2000
ConfigurationUpflow / Downflow
Burner StagesTwo
Fuel TypePropane, Natural Gas
Liquid Line3/8"
Suction Line1 1/8"
StyleA-Coil
Suction Line Insulation Thickness1/2"
Length50 feet

Frequently Asked Questions

What's the actual tonnage of this system? +
Specifications list both 3.5 ton and 5 ton, creating confusion. The 42,000 BTU cooling output aligns with 3.5-ton capacity, not 5 ton. Verify with your supplier before purchase to ensure adequate cooling for your square footage.
Can I use this in an attic installation? +
The upflow/horizontal configuration suits basements and crawlspaces better than attics. Upflow furnaces require return air from below, making attic placement problematic. Consult installation manuals for your specific structure before committing.
How does 96% AFUE compare to newer standards? +
96% AFUE ranks excellent for traditional gas furnaces and meets modern code in most regions. Current high-efficiency units reach 98-99% AFUE, but the difference in annual savings is modest, around $50-100 depending on climate.
Should I choose this over a higher SEER system? +
16 SEER1 delivers strong cooling efficiency without premium pricing of 18-22 SEER units. In moderate climates, payback time exceeds 10 years, making this tier a practical balance between efficiency and cost.
Is the 10-year warranty transferable if I sell my home? +
Goodman warranties typically transfer to second owners upon proof of registration and installation, though some coverage may be prorated. Check documentation details with your installer for exact terms.

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