Independent Review · Updated June 2026

3.5 Ton 15 SEER 80% AFUE 80,000 BTU Goodman Gas Furnace and Air Conditioner System - Upflow

Energy Star 80% AFUE furnace with 16 SEER2 cooling, reliable two-stage heating for moderate climates

7.8
IndustrialRank Score
Efficiency
8.2
Reliability
7.9
Value
7.5
Installation
8.4
Warranty
8.0
3.5 Ton 15 SEER 80% AFUE 80,000 BTU Goodman Gas Furnace and Air Conditioner System - Upflow
Current Price
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// Bottom Line
This Goodman split system fits homeowners in moderate climates seeking solid mid-range efficiency without premium pricing. The 80% AFUE furnace and 16 SEER2 condenser deliver respectable utility savings, though it trails high-efficiency models in extreme weather regions.

Review

This Goodman gas furnace and air conditioner split system targets the middle market with straightforward efficiency and proven Scroll compressor design. It's a traditional workhorse configuration, not bleeding-edge technology, which appeals to contractors and homeowners who prioritize reliability and service familiarity over experimental features. The system combines an 80,000 BTU, 80% AFUE two-stage furnace with a 42,000 BTU cooling unit rated 16 SEER2 and Energy Star certified.

The 80% AFUE efficiency means roughly 80 cents of every heating dollar goes into conditioned space, leaving 20 percent up the flue. At 16 SEER2, the condenser delivers above-spec cooling efficiency for moderate climates where peak cooling demand doesn't sustain 8-12 hours daily. The scroll compressor operates at 73 dB, noticeably quieter than older reciprocating designs. A high-efficiency multi-speed blower motor supports up to 2000 CFM, enabling better air distribution across larger homes without excessive noise.

Pros & Cons

Pros

  • 16 SEER2 rating exceeds the stated 15 SEER specification, delivering better cooling efficiency than advertised
  • 80% AFUE furnace with two-stage burners provides consistent heating across varying demand without oversized consumption
  • High-efficiency multi-speed blower motor with 2000 CFM maximum capacity enables better temperature distribution and zoning
  • Energy Star certified for both heating and cooling components, qualifying for utility rebates in most regions
  • 10-year warranty with online registration covers parts and compressor, standard protection for this price tier
  • Scroll compressor technology runs quieter at 73 dB, a practical advantage for bedroom-adjacent installations

Cons

  • 80% AFUE is acceptable but not exceptional; models at 90%+ AFUE offer significantly faster payback in cold climates despite higher upfront cost
  • Single-stage condenser compressor cycles on and off rather than modulating, reducing efficiency during mild weather operation
  • Specification sheet lists both 3.5 ton and 5 ton tonnage with conflicting BTU ratings, creating ambiguity for system matching
  • No variable-speed ECM blower option limits ability to reduce electric parasitic loads in spring and fall shoulder seasons

Who Should Buy

Best For

Homeowners in ASHRAE zones 4-5 (moderate winters, warm summers) replacing 10-15 year old systems will see 3-5 year payback on this equipment. It's also practical for budget-conscious buyers who value simplicity and reliability over peak efficiency.

Consider Alternatives If

Skip this model if you live in harsh climates, need variable-speed cooling, or want to maximize 15+ year energy savings; invest in 95% AFUE furnaces and 18+ SEER2 equipment instead.

3.5 Ton 15 SEER 80% AFUE 80,000 BTU Goodman Gas Fu
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Installation

Installation requires standard 120V single-phase 60 Hz power with 23.5 to 40-amp breaker sizing. The unit supports both R410A and R22 refrigerant, though R22 systems are legacy equipment. Suction line runs 1 1/8 inch copper with 1/2 inch insulation; liquid line is 3/8 inch. Metal exhaust flue requirement is non-negotiable. Professional installation is essential for proper refrigerant charging and electrical integration.

Warranty & Reliability

Goodman provides 10 years parts coverage and compressor protection upon online registration. This is standard market protection at this price point, though competitors occasionally offer 10-year warranties without registration hassle. The evaporator coil carries its own warranty document. Registration is straightforward but mandatory to activate full coverage.

Specifications

SKULS381183850
Brand/ManufacturerOnline Supply
Cooling BTU42,000
Heating BTU80,000
RefrigerantR410A or R22
Electrical120 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.
Airflow DirectionUpflow/Horizontal
Exhaust Flue RequirementMetal
Furnace Efficiency / AFUE80%
Blower MotorHigh Efficiency Multi-Speed
Maximum CFM2000
ConfigurationUpflow / Downflow
Burner StagesTwo
Fuel TypeGas
Liquid Line3/8"
Suction Line1 1/8"
StyleA-Coil
Suction Line Insulation Thickness1/2"
Length50 feet

Frequently Asked Questions

Why does the spec sheet list both 3.5 ton and 5 ton? +
This appears to be a documentation error from the manufacturer or retailer. The 42,000 BTU cooling capacity technically rates as 3.5 ton, but the header lists 5 ton. Verify tonnage with the seller before purchase. Mismatched furnace-condenser sizing severely degrades efficiency and lifespan.
Can I install this myself if I'm handy? +
No. EPA regulations require certified technicians to handle refrigerant. Electrical work must meet local codes. Poor charging causes 20-30% efficiency loss and compressor failure. Professional installation costs $1,500-$2,500 but protects your warranty and system performance.
How much will this save me compared to my old system? +
Upgrading from a 1995-era 60% AFUE furnace and 10 SEER condenser saves approximately 25-35% on combined heating-cooling bills in moderate climates. A typical household might recoup $1,800-$2,400 annually, translating to 5-7 year payback at current utility rates.
Is 16 SEER2 competitive with other brands at this price? +
Yes. Most mid-range split systems deliver 15-17 SEER2 ratings. Lennox and Carrier offer similar efficiency at comparable pricing. Premium brands like York command 5-10% more but don't deliver proportional cooling gains. This Goodman performs equally for standard duty cycles.
What if something breaks in year 8? +
Parts coverage extends through year 10 with registration. Year 8 compressor or condenser replacement costs $1,200-$1,800. After 10 years, you're on your own. Plan for replacement around year 15-17.

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