Independent Review · Updated June 2026

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

Solid mid-tier 5-ton system balancing 96% heating efficiency with affordable cooling power

8.2
IndustrialRank Score
Efficiency
8.5
Reliability
7.8
Value
8.0
Installation
8.5
Warranty
8.0
5 Ton 15 SEER 96% AFUE 100,000 BTU Goodman Gas Furnace and Air Conditioner System - Downflow
Current Price
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// Bottom Line
This Goodman system works best for homeowners upgrading from older equipment in moderate climates who prioritize heating efficiency and don't need premium cooling ratings. The 96% AFUE furnace and variable-speed blower deliver strong comfort at a reasonable price point, though the 15 SEER cooling is competent rather than cutting-edge.

Review

The Goodman CAPF4961C6 is a 5-ton split system that pairs a 100,000 BTU furnace with a 57,000 BTU air conditioner, landing in the practical middle of the market. It's designed for homes needing balanced heating and cooling without extreme efficiency claims. Weighing 46 pounds and sized at 21 by 21 by 30 inches, the downflow configuration fits attics, basements, and tight closets. This unit targets contractors and homeowners who value straightforward reliability and modest operating costs over premium features.

The furnace delivers 96% AFUE efficiency with a two-stage burner that modulates heat output for steadier comfort and lower fuel consumption. Cooling capacity reaches 57,000 BTU at 15 SEER, which is competent but not exceptional by 2024 standards. The variable-speed ECM blower motor runs up to 2000 CFM and adjusts its speed throughout the cycle, reducing runtime and noise compared to single-speed alternatives. Electrical requirements are modest, pulling between 36.7 and 60 amps at 208/230 volts single phase.

Pros & Cons

Pros

  • 96% AFUE furnace efficiency means lower monthly heating costs and qualifies for some state rebates
  • Variable-speed ECM blower motor adapts to heating and cooling demands, improving comfort and reducing energy waste
  • Two-stage burner and two-stage compressor provide modulation for more stable temperatures
  • Downflow/horizontal configuration fits tight spaces like attics or basements better than upflow units
  • PVC exhaust flue option simplifies installation in many homes and reduces condensation issues
  • 10-year warranty with online registration protects your investment across parts and labor

Cons

  • 15 SEER cooling rating is decent but trails newer 18+ SEER systems by meaningful efficiency margins
  • R410A or R22 refrigerant compatibility adds technician complexity, as older R22 systems require special handling
  • 74 dB noise level is moderately loud, audible in open living spaces during peak operation
  • No Energy Star certification despite decent specs, suggesting it misses efficiency thresholds by small margins

Who Should Buy

Best For

Homeowners in colder or mixed climates who heat more than they cool will see the best return on this system, especially if utility rebates apply to 96% AFUE equipment. Contractors serving price-conscious customers who need reliable equipment without premium efficiency pricing will appreciate Goodman's straightforward design and service availability.

Consider Alternatives If

Buyers in hot climates or those prioritizing maximum cooling efficiency should look at higher SEER models, as the 15 SEER rating won't match newer 18-20 SEER systems over a 15-year lifespan.

5 Ton 15 SEER 96% AFUE 100,000 BTU Goodman Gas Fur
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Installation

This downflow unit requires PVC or plastic exhaust flue, which many homes accommodate easily and actually perform better than metal venting in wet climates. The sweat-type refrigerant connections (3/8 inch liquid line, 7/8 inch suction line) demand careful brazing or professional crimping. Variable-speed blower wiring and two-stage controls need proper thermostat setup. Most qualified HVAC installers complete this job in 6 to 8 hours, with ductwork modifications accounting for most variation.

Warranty & Reliability

Goodman covers this system for 10 years on parts and labor when you register online, a solid baseline protection matching most mid-tier competitors. The warranty assumes professional installation and regular maintenance. Evaporator coil coverage extends separately, though details are found in the coil-specific warranty document. This isn't lifetime protection, but it covers the critical failure window where manufacturing defects surface.

Specifications

SKUCAPF4961C6
Brand/ManufacturerGoodman
Cooling BTU57,000
Heating BTU100,000
RefrigerantR410A or R22
Electrical208 / 230 V. 1 Phase 60 Hz
Warranty10 Years with Online Registration
Decibel Level (dBA)74
Weight (in lbs)46.000000
FeatureSpec
AHRI Certificate Number7368844
Airflow DirectionDownflow/Horizontal
Exhaust Flue RequirementPlastic / PVC
Product FeaturesRebate Available
Furnace Efficiency / AFUE96%
Blower MotorVariable Speed - ECM
Maximum CFM2000
ConfigurationUpflow / Downflow
Energy StarNo
Burner StagesTwo
Fuel TypePropane, Natural Gas
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.
SEER1 (Efficiency)18
Condenser StagesTwo Stage
Compressor TypeScroll
Liquid Valve Size3/8"
Suction Valve Size7/8"
Max Breaker Size60 amps
Min. Breaker Size36.7 amps
Tonnage5 Ton
Valve TypeSweat
Liquid Line3/8"
Suction Line7/8"
StyleA-Coil

Frequently Asked Questions

Does this system use R410A or R22 refrigerant? +
The spec sheet lists R410A or R22 compatibility, meaning your installer will charge it with one or the other based on your location and availability. R410A is the current standard and required in most new installations. Older R22 systems can be recharged with R22, but supplies are dwindling and costs are rising, so new equipment should specify R410A only.
Will this furnace fit in my attic, and does downflow matter? +
At 30 inches tall and 21 by 21 inches wide, this unit fits most attics, crawlspaces, and basement utility closets. Downflow configuration means air enters the top and exits the bottom, ideal for homes with ducts running below the unit. Upflow setup is also available if your ducts run upward, so confirm your ductwork direction before ordering.
How much can I save on heating with 96% AFUE compared to an 80% unit? +
A 96% furnace uses roughly 20 percent less gas than an 80% unit running the same schedule. On a typical $1200 annual heating bill, that's approximately $240 in savings yearly, or $2400 over 10 years. Actual savings vary by gas prices, climate, and thermostat management, but this represents a realistic payback period.
How does 15 SEER compare to newer 18-20 SEER units for cooling? +
15 SEER is roughly 15 to 25 percent less efficient than 18-20 SEER models, translating to maybe $200 to $400 more annually in cooling costs depending on climate and usage. Over 15 years, that adds up. If you cool heavily, higher SEER saves money. If you heat dominantly, the furnace efficiency matters more, making this system reasonable.
Is the 10-year warranty worth the online registration hassle? +
Yes, registering takes five minutes online and ensures Goodman honors the full 10-year coverage. Without registration, coverage drops significantly. Keep your receipt and registration confirmation. This warranty protects against compressor failure, furnace heat exchanger cracks, and blower motor defects, which are the costliest failure modes.

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