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

// Bottom Line

This system targets budget-conscious homeowners and contractors who need reliable heating and cooling without premium pricing. It delivers respectable efficiency with an 80% AFUE furnace and 16 SEER cooler, making it ideal for moderate climates where peak performance matters less than affordability.

Review

Goodman's 4-ton upflow system represents the practical middle ground in residential HVAC. At $2,170, it undercuts premium brands while retaining Energy Star certification and solid component selection. This combination makes sense for contractors managing project budgets and homeowners replacing 15+ year old systems who need immediate relief without financing strain. The upflow configuration works well for split installations in basements or utility closets typical of residential retrofits.

The furnace delivers 80,000 BTU heating output at 80% AFUE with two-stage burner operation, while the air conditioner provides 45,500 BTU cooling at 16 SEER1 rating. Variable speed blower motor reaches 2,000 CFM maximum and adjusts output based on demand, improving part-load efficiency. Electrical requirements remain modest at 120V single phase with 23.9 to 40 amp breaker sizing, fitting standard residential panels. These specs indicate competent baseline performance rather than class-leading efficiency.

Pros & Cons

Pros

Strong price-to-performance ratio at $2,170 for a complete 4-ton system
Variable speed blower motor maximizes comfort and reduces energy waste at partial load
Two-stage burner on furnace enables efficient heating and better temperature control
Energy Star certified cooler with 16 SEER1 rating exceeds baseline efficiency standards
10-year warranty with online registration provides solid consumer protection

Cons

80% AFUE is dated for modern standards, high-efficiency furnaces reach 95%+ AFUE
Single-stage cooling compressor cycles on/off rather than modulating for precision
73 dB noise level registers moderately loud, audible from adjacent rooms during operation

Who Should Buy

Best For

Homeowners in mild-to-moderate climates replacing older equipment and prioritizing upfront savings over premium efficiency gains. Contractors seeking reliable spec'd equipment for rental properties or starter homes where cost control drives project economics.

Consider Alternatives If

Anyone in extreme climates, those planning to stay 10+ years who'd benefit from high-efficiency models, or buyers who can't tolerate moderate operating noise.

4 Ton 15 SEER 80% AFUE 80,000 BTU Goodman Gas Furn

$2170

Buy at HVACDirect →

Installation

Upflow/horizontal configuration supports both basement and closet installations common in residential settings. Technicians need metal exhaust flue piping, proper refrigerant line sizing with 1/2 inch suction insulation over 50 feet maximum, and standard electrical connections. Valve connections use 3/8 inch liquid and 7/8 inch suction ports with 1 1/8 inch suction line. Most qualified HVAC contractors complete installation in a single workday with minimal custom fabrication required.

Warranty & Reliability

Ten year parts and labor coverage applies with online registration, protecting major components like the compressor and heat exchanger. This duration matches competitors at similar price points but trails extended warranties available on premium models. Coverage transfers if you sell your home, adding resale appeal. Activation requires completing registration paperwork within 30 days of installation.

Specifications

SKU	LS381183850
Brand/Manufacturer	Online Supply
Cooling BTU	45,500
Heating BTU	80,000
Refrigerant	R410A or R22
Electrical	120 V. 1 Phase 60 Hz
Warranty	10 Years with Online Registration
Decibel Level (dBA)	73
Weight (in lbs)	48.000000
Feature	Spec
Replaces	GSX16S481
Energy Star	Yes
SEER1 (Efficiency)	16
Condenser Stages	Single Stage
Compressor Type	Scroll
Liquid Valve Size	3/8"
Suction Valve Size	7/8"
Max Breaker Size	40 amps
Min. Breaker Size	23.9 amps
Tonnage	5 Ton
Height	30"
Width	21"
Depth	21"
Resources	CAPF Installation Manual CAPF Specifications Sheet Goodman Evaporator Coil Warranty You will need Adobe® Acrobat® 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.
AHRI Certificate Number	204633302
Airflow Direction	Upflow/Horizontal
Exhaust Flue Requirement	Metal
Furnace Efficiency / AFUE	80%
Blower Motor	Variable Speed
Maximum CFM	2000
Configuration	Upflow / Downflow
Burner Stages	Two
Fuel Type	Propane, Natural Gas
Liquid Line	3/8"
Suction Line	1 1/8"
Style	A-Coil
Suction Line Insulation Thickness	1/2"
Length	50 feet

Frequently Asked Questions

How does the 16 SEER1 cooling rating compare to newer air conditioners? +

16 SEER1 represents respectable efficiency circa 2015-2018 technology but lags modern 18-22 SEER2 units by roughly 15-25% in cooling efficiency. For homeowners in moderate climates, the reduced operating costs from upgrading rarely justify the $1,500+ premium over this unit within 10 years.

Can I use this system with my existing ductwork from a 5-ton unit? +

The 4-ton tonnage perfectly fits ducts sized for 4-ton loads. If your old system was 5-ton, ducts are oversized, which improves airflow velocity and reduces noise. No modifications needed, though you'll lose slight cooling capacity compared to the original.

What's the real-world heating cost difference between 80% AFUE and 95% AFUE? +

An 80% AFUE system wastes 20% of fuel as exhaust heat. Upgrading to 95% AFUE saves roughly $200-400 annually depending on fuel prices and climate. Over 15 years, high-efficiency pays for itself, but in moderate climates under 5,000 heating degree days, payback extends beyond 10 years.

How does this Goodman system compare to Bryant or Carrier equipment at similar price points? +

All three manufacturers offer comparable 4-ton bundles in this price range with nearly identical SEER/AFUE ratings and component quality. Goodman's advantage lies in parts availability and contractor familiarity. Brand choice matters less than proper installation and seasonal maintenance.

Does the 10-year warranty cover refrigerant recharge if I develop a leak? +

The warranty covers manufacturing defects in sealed components. Refrigerant leaks from normal wear, impact damage, or improper installation are excluded. Technician labor for leak repairs costs $150-300 beyond warranty scope.

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