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

// Bottom Line

This is an entry-level system for budget-conscious homeowners or landlords managing rental properties where upfront cost matters more than operating expenses. It delivers dependable heating and cooling but won't win efficiency awards compared to modern high-SEER equipment.

Review

Goodman's 4-ton gas furnace and air conditioner system hits the market at an attractive entry price, making it accessible for homeowners facing unexpected HVAC failure. This upflow configuration combines an 80% AFUE furnace with an Energy Star certified air conditioner in a single package. The A-coil design takes up minimal space in tight installations. At this price tier, you're trading cutting-edge efficiency for straightforward, proven technology that performs its basic function reliably.

The furnace delivers 80,000 BTU of heating output with two-stage burner modulation, while the air conditioning side produces 45,500 BTU cooling capacity. The SEER rating hits 16, though the title lists 15, warranting clarification from the seller. A high-efficiency multi-speed blower motor circulates air at up to 2,000 CFM, helping distribute conditioned air more evenly than fixed-speed alternatives. The scroll compressor runs on R410A or R22 refrigerant and operates at 73 dB, which sits above whisper-quiet premium models but remains acceptable for residential settings.

Pros & Cons

Pros

Excellent price point at $117 for a complete 4-ton system with both heating and cooling
80% AFUE furnace meets baseline efficiency standards for gas heating in most climates
High-efficiency multi-speed blower motor reduces runtime and fan noise compared to single-speed alternatives
Energy Star certified air conditioning component qualifies for potential utility rebates
Two-stage burner provides modulated heating for more consistent comfort than single-stage models
Compact upflow/downflow A-coil design fits tight installation spaces

Cons

15 SEER cooling (SEER1 spec shows 16, but title states 15, creating specification conflict that needs clarification)
80% AFUE is adequate but lags behind modern 95% AFUE furnaces by 15 percentage points in heating efficiency
Single-stage compressor doesn't modulate capacity, causing on-off cycling that wastes energy at partial load conditions
73 dB noise level runs louder than premium condenser models during operation
No variable refrigerant flow means higher power consumption compared to inverter-driven competitors

Who Should Buy

Best For

Budget-focused homeowners replacing failed equipment who need immediate cooling and heating without financing options, or rental property investors prioritizing capital expenditure control over long-term utility savings. This system works well in moderate climates where furnace runtime stays moderate during winter months.

Consider Alternatives If

Homeowners in cold climates where furnaces run 6+ months yearly should invest in 95% AFUE models to offset higher equipment cost through fuel savings. Energy-conscious buyers willing to spend more upfront will recover the premium within 5-7 years through lower utility bills.

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

$117

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Installation

Installation requires 120V single-phase 60Hz power with a breaker sized between 23.9 and 40 amps, making it compatible with standard residential electrical panels. Refrigerant lines need proper insulation, 3/8-inch liquid line and 7/8-inch suction valve connections with 1/2-inch insulation thickness over 50 feet maximum. The furnace requires a metal exhaust flue for safe venting. Professional installation is strongly recommended for proper charging and safety verification.

Warranty & Reliability

The 10-year warranty covers manufacturer defects when registered online, providing solid peace-of-mind protection for parts replacement. The evaporator coil carries its own dedicated warranty documentation. Registration is required to activate coverage, so keep documentation accessible. This warranty length aligns with industry standard for budget-tier equipment, though it's shorter than premium brands offering 12-year coverage.

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.
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

Does this system qualify for energy rebates? +

Yes, the Energy Star certification on the air conditioning component makes you eligible for utility company and federal tax incentives in most states. Contact your local utility for specific rebate amounts, which typically range from $300 to $1,000. You'll need to register the equipment and provide proof of professional installation.

Can I use this in an existing ductwork setup? +

Yes, the upflow/downflow A-coil configuration adapts to most residential duct systems. However, verify your existing furnace blower housing matches the connection points and that your ductwork diameter supports 2,000 CFM maximum airflow. Have a technician measure your ductwork static pressure to confirm adequate sizing.

How does 80% AFUE compare to modern furnaces? +

At 80% AFUE, this furnace converts 80 cents of every heating dollar to usable warmth, losing 20 cents up the flue. Modern 95% AFUE furnaces recapture that wasted heat. Over a 20-year lifespan in cold climates, the efficiency gap costs roughly $3,000 to $5,000 in extra fuel consumption.

Why does the title say 4 ton but specs show 5 ton? +

This specification discrepancy appears to be a data entry error. The cooling capacity of 45,500 BTU converts to approximately 3.8 tons, while 80,000 BTU heating roughly equals 4 tons. Request clarification from the seller before purchase to confirm actual system capacity.

Is the 10-year warranty transferable if I sell my home? +

Goodman typically offers limited transferability on registered warranties, though specific terms depend on your registration details. Review warranty documentation or contact Goodman directly to confirm whether a second owner can claim coverage during years 6-10.

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