5 Ton 15 SEER 80% AFUE 100,000 BTU Goodman Gas Furnace and Air Conditioner System - Upflow Review 2026

// Bottom Line

This Goodman system works best for homeowners upgrading from older equipment who want dependable performance without premium pricing. The two-stage heating and cooling design delivers consistent comfort across most climates, though it trails high-efficiency alternatives in long-term operating costs.

Review

The Goodman 5-ton gas furnace and air conditioner system sits squarely in the contractor-preferred middle market. This upflow configuration handles both heating and cooling loads for average residential homes without requiring premium installation complexity or premium pricing. Goodman has built reputation on straightforward, reliable equipment that performs well for 15-20 years. This particular unit combines a gas furnace rated at 80% AFUE with an air conditioning section achieving 15 SEER cooling efficiency, making it a solid step up from base-model alternatives while remaining cost-competitive.

The heating side delivers 100,000 BTU output through a two-stage burner, reducing energy waste during partial-load operation common in spring and fall. Cooling capacity reaches 60,000 BTU with a two-stage scroll compressor and 15 SEER rating, meaning roughly 15 BTU of cooling per watt consumed. Variable-speed blower technology adjusts to 2,000 CFM maximum, distributing conditioned air more evenly while keeping noise at 75 dBA. The R410A refrigerant system uses standard 3/8-inch liquid and 7/8-inch suction lines, compatible with most residential ductwork configurations.

Pros & Cons

Pros

Two-stage burner and condenser provide modulating comfort and lower short-cycling losses
15 SEER rating qualifies as ENERGY STAR with measurable cooling efficiency gains over 13 SEER units
100,000 BTU heating capacity and 60,000 BTU cooling capacity handles 5-ton residential loads effectively
Variable-speed blower motor optimizes airflow distribution and reduces runtime noise to 75 dBA
Scroll compressor design offers proven durability with lower maintenance call rates

Cons

80% AFUE is mid-range; condensing furnaces reach 95-98% AFUE for homes in cold climates
Requires 208/230V single-phase power, limiting installation in some older homes with different electrical service
Sweat valve connections demand experienced HVAC technicians, not DIY-friendly

Who Should Buy

Best For

Homeowners in mixed climates replacing 10-15 year old systems who prioritize balanced efficiency and reliability over premium features. This unit suits single-family homes between 1,500-2,000 square feet needing straightforward replacement installations.

Consider Alternatives If

Buyers in extremely cold climates should consider 95%+ AFUE condensing furnaces; those wanting cutting-edge 16+ SEER ratings should explore single-stage compressor alternatives.

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Installation

Installation demands standard HVAC skills for both heating and cooling components. The unit requires 208/230V single-phase 60Hz electrical service with breaker capacity between 37.2-60 amps, a limiting factor in homes with undersized service panels. Sweat valve connections and metal exhaust flue requirements necessitate licensed technician installation. The 38.25-inch height and 35.5-inch square footprint fit typical utility closets and basement installations in upflow configuration.

Warranty & Reliability

Goodman backs this system with 10 years parts coverage when registered online, a standard benefit that requires minimal effort. This warranty length matches most mid-tier competitors and provides meaningful protection against compressor or heat exchanger failure. Registration typically takes five minutes through Goodman's website and unlocks the full warranty term, so skipping this step would be costly.

Specifications

SKU	TX5N4
Brand/Manufacturer	Goodman
Cooling BTU	60,000
Heating BTU	100,000
Refrigerant	R410A
Electrical	208 / 230 V. 1 Phase 60 Hz
Warranty	10 Years with Online Registration
Decibel Level (dBA)	75
Weight (in lbs)	2.500000
Feature	Spec
Configuration	Upflow/Horizontal
Liquid Line	3/8"
Suction Line	7/8"
Tonnage	5 Ton
Style	A-Coil
Height	38.25"
Width	35.5"
Depth	35.5"
Resources	Goodman Specifications You will need AdobeÂ® AcrobatÂ® Reader to view PDF documents.
Safety Information	PROPOSITION 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 Direction	Upflow/Horizontal
Exhaust Flue Requirement	Metal
Furnace Efficiency / AFUE	80%
Blower Motor	Variable Speed
Maximum CFM	2000
Burner Stages	Two
Fuel Type	Propane, Natural Gas
Energy Star	Yes
SEER1 (Efficiency)	16
Condenser Stages	Two Stage
Compressor Type	Scroll
Liquid Valve Size	3/8"
Suction Valve Size	7/8"
Max Breaker Size	60 amps
Min. Breaker Size	37.2 amps
Valve Type	Sweat

Frequently Asked Questions

How does 15 SEER compare to other Goodman units? +

15 SEER represents current standard efficiency, down from the spec sheet's stated 16 SEER rating. Real-world cooling efficiency depends on proper refrigerant charge and airflow. Older 13 SEER units consume roughly 15% more electricity, costing an extra $150-200 annually in most climates.

Can this unit retrofit into my existing ductwork? +

The 2,000 CFM maximum airflow and standard valve sizes work with most residential duct systems installed after 1990. Have a technician verify your current ductwork matches 5-ton capacity before ordering. Undersized ducts reduce efficiency and system lifespan significantly.

What's the difference between two-stage and single-stage operation? +

Two-stage heating and cooling ramps down during mild weather, reducing short-cycling and energy waste. Single-stage units run full-capacity constantly, creating temperature swings. The two-stage design adds roughly 5-8% annual efficiency gains in moderate climates.

How does this compare to high-efficiency condensing furnaces? +

This 80% AFUE furnace loses 20% heat through exhaust, while 95-98% AFUE condensing units capture that waste. In Minnesota or Michigan, condensing furnaces save $300-500 annually but cost $1,000-1,500 more upfront. Payback occurs in 4-5 years for cold climates.

What happens if I don't register the warranty online? +

Skipping registration voids the 10-year parts coverage, leaving you exposed to compressor replacement costs exceeding $1,500. Registration requires only proof of purchase and five minutes online through Goodman's website.

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