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

// Bottom Line

This Goodman system works well for homeowners seeking straightforward, reliable heating and cooling without premium pricing. The 80% AFUE furnace and 16 SEER condenser deliver respectable efficiency for modest budgets, though it lacks the variable-capacity features found in higher-end units.

Review

Goodman's 4-ton split system strikes a middle ground between entry-level and premium HVAC equipment. At 2188 dollars, this unit positions itself as an accessible option for homeowners balancing upfront cost against reasonable efficiency gains. The combination of an 80% AFUE furnace and 16 SEER condenser represents solid mid-market performance, making it popular with contractors handling standard residential replacements. The system's A-coil design and upflow configuration offer installation flexibility for many home layouts.

The furnace delivers 80,000 BTU heating capacity through a two-stage burner, allowing it to modulate output for better comfort during mild weather. The air conditioner produces 45,500 BTU cooling and maintains 16 SEER efficiency, which beats federal baseline by two points. Both components run on 120V single-phase power with a 40-amp maximum breaker, standard for most residential electrical panels. Variable-speed blower technology adjusts to 2000 CFM maximum, preventing energy waste during partial-load operation typical in spring and fall.

Pros & Cons

Pros

16 SEER cooling efficiency exceeds the 14 SEER federal minimum and qualifies for ENERGY STAR certification
80,000 BTU heating capacity with two-stage burner provides responsive warmth in cold climates
Variable-speed blower motor optimizes airflow at up to 2000 CFM, reducing energy waste
Scroll compressor is proven durable technology with good track record across residential installs
10-year warranty with online registration covers parts and labor on most components
A-coil design works in upflow or downflow configurations, increasing installation flexibility

Cons

80% AFUE lags behind high-efficiency furnaces rated 95%+, costing more to operate over time
Single-stage condenser compressor cannot modulate capacity, cycling on and off rather than ramping output
73 dB noise level sits slightly above whisper-quiet systems, noticeable in quiet rooms
R410A refrigerant phase-out pressure may limit long-term service parts availability in future years

Who Should Buy

Best For

Homeowners upgrading from 10-15 year old systems who prioritize affordability over cutting-edge efficiency. Contractors installing budget-conscious residential replacements in mild to moderate climates will appreciate the straightforward design and solid parts compatibility.

Consider Alternatives If

Anyone in very cold climates needing maximum heating efficiency, or buyers planning to stay in their home 15+ years and wanting lowest operating costs should explore 95% AFUE furnaces and variable-capacity air conditioners.

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

$2188

Buy at HVACDirect →

Installation

Installation requires standard lineset connections using 3/8-inch liquid and 1 1/8-inch suction lines with 1/2-inch insulation rated to 50 feet. Valve sizes are 3/8-inch liquid and 7/8-inch suction, typical for 4-5 ton systems. Metal exhaust flue is required for the furnace. Most qualified HVAC installers complete setup in one to two days, assuming existing ductwork and electrical infrastructure support the system.

Warranty & Reliability

Online registration activates a full 10-year parts and labor warranty covering manufacturing defects. This period protects against compressor failure, heat exchanger cracks, and blower motor issues. Registration is mandatory to claim coverage, and homeowners must retain documentation. The warranty is solid for the price point, though some competitors offer extended coverage on sealed components like compressors.

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	24.5"
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	204633307
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 16 SEER compare to other cooling ratings? +

16 SEER is two points above the 14 SEER federal minimum and qualifies for ENERGY STAR. Most mid-range units sit between 14-18 SEER. High-efficiency options reach 20+ SEER but cost significantly more and save money primarily in extremely hot climates or homes running air conditioning 8+ hours daily.

Can this system replace my old furnace and AC if they're different brands? +

Yes, but have a technician verify ductwork compatibility and electrical service capacity. The 40-amp breaker requirement fits most homes, but older panels may need upgrades. Mixing old and new equipment sometimes reduces efficiency if components don't match factory specifications perfectly.

Will 80% AFUE cost significantly more to heat than a 95% model? +

In cold climates, a 95% AFUE furnace saves roughly 15% annually on heating fuel, which adds up over years. For moderate climates with mild winters, the difference might be 100-200 dollars per year. Calculate payback: a 95% unit costs roughly 500-800 dollars more upfront.

What's the difference between this single-stage compressor and variable-capacity options? +

Single-stage runs full power or off, cycling frequently on cool days. Variable systems ramp output gradually, improving comfort and efficiency during partial-load operation. This unit compensates somewhat through its variable-speed blower, keeping costs down while sacrificing some comfort refinement.

Does online registration warranty really require paperwork? +

Yes, register on Goodman's website within 30-60 days of installation with proof of purchase and serial number. Skipping registration voids the warranty, leaving you responsible for repairs. Keep documentation in a safe place for the entire 10-year period.

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