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

// Bottom Line

This Goodman system is ideal for budget-conscious homeowners and contractors looking for an entry-level combo unit that doesn't sacrifice reliability. At $117, you're getting a functional split system with proven Goodman components, though the 80% AFUE heating efficiency and single-stage cooling mean you'll see higher operating costs than premium models.

Review

The Goodman 4-ton combo system represents practical, no-frills HVAC for price-conscious buyers. This upflow configuration pairs a gas furnace with an air conditioner condenser in one affordable package, priced at just $117. It's positioned as an entry-level alternative to premium brands, offering proven Goodman scroll compressor technology and solid construction without premium efficiency ratings. The system is ENERGY STAR certified on the cooling side, meeting federal baseline efficiency standards for both residential retrofit and new construction applications.

Performance specs tell a balanced story. The 100,000 BTU heating output with 80% AFUE is adequate but pedestrian, matching 1990s-era efficiency standards. On cooling, the 45,500 BTU capacity and 16 SEER1 rating deliver respectable performance for the price tier. The high-efficiency multi-speed blower reaches 2,000 CFM, supporting proper air distribution. Single-stage compressor cooling means the unit runs at full capacity whenever cooling is needed, rather than modulating down during mild weather, reducing the efficiency advantage you'd see with variable-capacity systems.

Pros & Cons

Pros

Exceptional price point at $117 for a complete 4-ton combo system with furnace and condenser
ENERGY STAR certified air conditioner with 16 SEER1 efficiency rating for cooling performance
Two-stage gas furnace burner provides heating flexibility and modest efficiency gains over single-stage models
High-efficiency multi-speed blower motor maximizes airflow at up to 2,000 CFM for better comfort
10-year warranty with online registration covers both heating and cooling components

Cons

80% AFUE furnace efficiency is below modern standards, costing more in heating fuel over time
Single-stage compressor lacks variable capacity to reduce cycling and energy waste during mild weather
73 dB noise level is louder than premium units, noticeable in quiet residential settings
Requires metal exhaust flue, limiting installation flexibility in some retrofit applications

Who Should Buy

Best For

This system works best for homeowners in moderate climates where heating and cooling demands are balanced, or budget-conscious buyers who plan to occupy the home for 5-7 years. Contractors stocking rental properties or investment homes will appreciate the affordable entry price and proven Goodman reliability.

Consider Alternatives If

Skip this unit if you're in a harsh heating climate where furnace runtime is high, live in a noise-sensitive area, or plan to stay in the home 15+ years and want maximum efficiency payback.

4 Ton 15 SEER 80% AFUE 100,000 BTU Goodman Gas Fur

$117

Buy at HVACDirect →

Installation

This upflow unit measures 30 inches tall by 21 inches wide by 21 inches deep, fitting standard furnace closets and utility spaces. The 48-pound weight is manageable for two technicians. Electrical requirements are straightforward, 120V single phase 60Hz with 23.9 to 40 amp breaker sizing. Refrigerant lines use 3/8 inch liquid and 7/8 inch suction sizes with standard 1/2 inch insulation. Metal exhaust flue is mandatory, ruling out some PVC-only installations.

Warranty & Reliability

Goodman backs this system with a 10-year parts warranty when you register online after purchase. This covers both furnace and air conditioner components. Registration is straightforward through Goodman's website using your purchase documentation. The 10-year term is competitive at this price point, though some premium brands offer lifetime warranties on compressors. Warranty claims typically require proof of professional installation.

Specifications

SKU	LS381183850
Brand/Manufacturer	Online Supply
Cooling BTU	45,500
Heating BTU	100,000
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.
Airflow Direction	Upflow/Horizontal
Exhaust Flue Requirement	Metal
Furnace Efficiency / AFUE	80%
Blower Motor	High Efficiency Multi-Speed
Maximum CFM	2000
Configuration	Upflow / Downflow
Burner Stages	Two
Fuel Type	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

What does the 16 SEER1 rating mean for my cooling bills? +

SEER1 is the updated efficiency metric. A 16 SEER1 unit is moderately efficient, using about 20-25% less energy than 13 SEER baseline models. For a 4-ton system running 800 hours annually, you'd save roughly $150-200 per year versus an older unit, though premium 18-20 SEER models save even more.

Can I use R22 refrigerant in this system or must I use R410A? +

The specs allow both R410A and R22, but this is an older design choice. New installations must use R410A by EPA regulation. If you're retrofitting an existing R22 system, verify compatibility with your technician, as mixing refrigerants is prohibited and dangerous.

How does 80% AFUE compare to newer furnaces? +

80% AFUE means 20% of heating energy is lost up the flue. Modern systems hit 95% AFUE. On a 100,000 BTU furnace running 1,500 hours annually, the 15-point efficiency gap costs roughly $300-400 per year in wasted fuel, depending on gas prices in your area.

Is this system better than a Bryant or Carrier unit at the same price? +

Goodman and Bryant share the same parent company and similar components. Carrier units typically cost 20-30% more for equivalent specs. This Goodman system is competitive at $117, though premium brands offer quieter compressors and higher SEER ratings if budget allows.

What happens if my system breaks down after year three? +

With the 10-year warranty registered, parts are covered including compressor, furnace heat exchanger, and blower motor. Labor costs and refrigerant charges are your responsibility. Always register immediately after installation to activate coverage.

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