Independent Review · Updated June 2026

5 Ton 16.7 SEER 80% AFUE 100,000 BTU Goodman Gas Furnace and Heat Pump System - Upflow

Energy Star 5-ton combo delivers 16.7 SEER cooling with solid 80% AFUE heating

7.8
IndustrialRank Score
Efficiency
8.2
Reliability
7.6
Value
7.9
Installation
8.1
Warranty
7.5
5 Ton 16.7 SEER 80% AFUE 100,000 BTU Goodman Gas Furnace and Heat Pump System - Upflow
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// Bottom Line
This Goodman system works well for homeowners replacing mid-range equipment in moderate climates and wanting Energy Star certification without premium pricing. The 80% AFUE furnace is respectable but not cutting-edge, while the 16.7 SEER cooling (SEER1) provides solid seasonal efficiency for its class.

Review

The Goodman 5-ton gas furnace and heat pump system represents a mainstream choice for homeowners balancing efficiency gains against replacement costs. This upflow configuration handles both heating and cooling, making it suitable for all-in-one system upgrades. The Energy Star certification signals compliance with current efficiency benchmarks, though the hardware itself sits in the solid mid-range rather than premium tier. Goodman has maintained brand presence through contractor relationships and parts availability, despite recent quality control debates in the industry.

Cooling performance delivers 57,000 BTU at 16.7 SEER1 with a scroll compressor and two-stage condenser, enabling the unit to modulate capacity during mild weather rather than cycling on-off constantly. The heating side produces 57,000 BTU output at 80% AFUE with two-stage burners, meaning roughly 80 cents of every energy dollar converts to usable heat, with 20 cents lost through flue gases. The variable-speed blower motor and maximum 2,000 CFM airflow help distribute conditioned air more evenly than fixed-speed alternatives. Electrical demands run 38.8 to 60 amps at 208/230V single-phase, typical for residential installations.

Pros & Cons

Pros

  • Energy Star rated with 16.7 SEER1 cooling efficiency and dual-stage compressor for modulated performance
  • Two-stage furnace with 80% AFUE and 57,000 BTU output handles typical residential heating loads
  • Variable-speed blower motor improves comfort and reduces runtime noise compared to single-speed units
  • 10-year warranty with online registration provides reasonable coverage for system longevity
  • Compact 30 inch height, 21 inch width and depth fit standard utility closets and upflow installations

Cons

  • 80% AFUE furnace is mid-tier efficiency, missing out on 90%+ AFUE benefits during heating season
  • SEER1 rating of 16.7 lags premium systems at 18-20+ SEER2 equivalents in the same tonnage
  • No specification data on refrigerant charge size, liquid line length limits, or subcooling requirements creates installation uncertainty

Who Should Buy

Best For

Homeowners in zones 4-5 climates replacing 15-20 year old equipment who prioritize cooling efficiency and want Energy Star designation at mid-market pricing. Contractors doing residential retrofit jobs in moderate-temperature regions where 80% AFUE heating meets code and homeowner budgets.

Consider Alternatives If

Builders in cold climates (zones 6-8) needing 90%+ AFUE or homeowners in hot climates wanting top-tier 18+ SEER2 cooling should explore higher-efficiency alternatives.

5 Ton 16.7 SEER 80% AFUE 100,000 BTU Goodman Gas F
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Installation

This upflow unit measures 30 inches tall, 21 inches wide and deep, fitting most standard closets and utility spaces. Installation requires metal exhaust flue, proper R410A or R22 refrigerant line sizing (3/8 inch liquid, 1 1/8 inch suction with 1/2 inch insulation), and 208/230V electrical service with appropriate breaker protection. Professional HVAC installation is strongly recommended for refrigerant charging, ductwork connections, and gas line safety verification.

Warranty & Reliability

Goodman provides 10 years of parts coverage upon online registration, covering compressor, coils, and most components. This warranty is standard for the brand but shorter than some competitors offering 12-15 years. Labor and refrigerant are typically not covered. Registration immediately after purchase is essential to activate protection and should be documented.

Specifications

SKULS381183850
Brand/ManufacturerOnline Supply
Cooling BTU57,000
Heating BTU57,000
RefrigerantR410A or R22
Electrical208 / 230 V. 1 Phase 60 Hz
Warranty10 Years with Online Registration
Decibel Level (dBA)75
Weight (in lbs)48.000000
FeatureSpec
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 RequirementMetal
Furnace Efficiency / AFUE80%
Blower MotorVariable Speed
Maximum CFM2000
ConfigurationUpflow / Downflow
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.
Product FeaturesRebate Available, Two Stage Condenser
Energy StarYes
SEER1 (Efficiency)18
Condenser StagesTwo Stage
Compressor TypeScroll
Liquid Valve Size3/8"
Suction Valve Size1 1/8"
Max Breaker Size60 amps
Min. Breaker Size38.8 amps
Tonnage5 Ton
Valve TypeSweat
Liquid Line3/8"
Suction Line1 1/8"
StyleA-Coil
Suction Line Insulation Thickness1/2"
Length50 feet

Frequently Asked Questions

What's the difference between SEER1 16.7 and SEER2 ratings I see on newer units? +
SEER1 and SEER2 use different testing methods; SEER2 reflects real-world conditions more accurately and typically runs 15-20% lower numerically. This unit's 16.7 SEER1 roughly equals approximately 13.3-14 SEER2, placing it mid-market rather than premium tier.
Can this system work with my existing ductwork? +
The 2,000 CFM maximum airflow rate is standard for 5-ton systems. Existing ductwork should be evaluated by a technician to confirm it handles this volume without excessive static pressure, which reduces efficiency and comfort.
Is 80% AFUE heating good enough for my region? +
80% AFUE is code-compliant in most climates but misses efficiency bonuses available in zones 6-8 with 90%+ units. In milder climates (zones 4-5), the lower upfront cost often outweighs modest heating season savings from higher AFUE.
How does this Goodman compare to Lennox or Carrier equivalents at the same tonnage? +
This unit competes on price but lags slightly on cooling efficiency and noise ratings. Lennox and Carrier 5-ton systems often hit 17-18 SEER1 and operate 2-3 dB quieter, though at higher cost and with better resale value perception.
What happens after the 10-year warranty expires? +
Parts are no longer covered by manufacturer warranty. Repair costs become the homeowner's responsibility, though Goodman parts remain widely available and relatively affordable through HVAC wholesalers.

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