3.5 Ton 14 SEER 80% AFUE 80,000 BTU Goodman Gas Furnace and Air Conditioner System - Upflow Review 2026

// Bottom Line

This Goodman system is ideal for cost-conscious homeowners and contractors replacing older equipment in moderate climates where 80% AFUE meets local codes. At $2053, it delivers solid heating and cooling performance without premium pricing, though efficiency enthusiasts should explore 95% AFUE furnaces.

Review

Goodman's 3.5-ton combo system occupies an important market segment: affordable, code-compliant equipment that doesn't break the budget. At $2053, this unit bundles an 80,000 BTU furnace with a 42,000 BTU air conditioner in one compact upflow package. Online Supply positions this as an entry-level option for contractors and homeowners facing replacement decisions, where upfront cost matters as much as long-term efficiency.

Performance specs reveal a practical, if not premium, efficiency profile. The furnace delivers 80% AFUE with two-stage burner capability, meaning it modulates output rather than running full-blast constantly. Cooling efficiency sits at 16 SEER1 with a single-stage scroll compressor and variable-speed blower that peaks at 2000 CFM. These numbers won't impress efficiency geeks, but they meet Energy Star standards and keep operating costs reasonable in moderate climates.

Pros & Cons

Pros

Energy Star certified with 80% AFUE furnace efficiency and two-stage burner for better modulation
3.5-ton cooling capacity with 42,000 BTU and variable-speed blower motor for balanced comfort
Metal exhaust flue design ensures safe venting and compliance with modern building codes
Compact 21 by 30-inch footprint fits tight installations and upflow/downflow configurations
10-year warranty with online registration provides solid long-term protection at this price point

Cons

80% AFUE is outdated by modern standards; 95% AFUE systems offer 15 percentage point savings on heating costs
Single-stage air conditioning compressor means less efficient part-load operation compared to variable-capacity units
73 dB noise level runs slightly louder than premium competitors, potentially noticeable in quiet residential settings

Who Should Buy

Best For

Homeowners in climate zones 4 through 7 replacing failed systems on tight budgets, and contractors needing reliable equipment for rental properties or rental fleet management. This system fits well in moderate heating climates where 80% AFUE satisfies code requirements without premium pricing.

Consider Alternatives If

Anyone prioritizing low utility bills should look at 95% AFUE furnaces, and customers in cold climates with extended heating seasons will see better ROI from higher-efficiency alternatives.

3.5 Ton 14 SEER 80% AFUE 80,000 BTU Goodman Gas Fu

$2053

Buy at HVACDirect →

Installation

This upflow A-coil system requires standard ducting connections with 3/8-inch liquid lines and 1 1/8-inch suction lines, insulated to 1/2 inch. Electrical demands include 120V single-phase 60Hz service with breaker sizing between 23.5 and 40 amps. Metal exhaust flue is mandatory. Technicians appreciate the 48-pound weight and compact 21 by 21 by 30-inch dimensions, which simplify handling and fit tight closet installations.

Warranty & Reliability

Goodman covers this system for 10 years when you register online, which is respectable for entry-level equipment. Coverage includes the evaporator coil and major components, though specifics require reviewing the AHRI certificate 204633302 and installation documentation. Registration is quick and extends protection beyond standard limited warranties.

Specifications

SKU	LS381183850
Brand/Manufacturer	Online Supply
Cooling BTU	42,000
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
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	23.5 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 80% AFUE compare to higher-efficiency furnaces? +

80% AFUE means 20 cents of every heating dollar escapes through the exhaust. Modern 95% AFUE condensing furnaces waste only 5 cents per dollar. Over a 20-year lifespan in cold climates, the difference totals thousands. This unit suits moderate climates where heating season is shorter.

Will this system fit my existing ductwork and electrical service? +

The 21-inch cube footprint fits most closets and utility spaces. Electrically, you need a 40-amp breaker minimum on dedicated 120V service. Check your panel capacity and existing line sizes, which should accommodate 3/8-inch liquid and 1 1/8-inch suction lines with proper insulation.

What makes the variable-speed blower important? +

Variable-speed motors run at lower speeds during partial-load conditions, using 40-60% less energy than fixed-speed alternatives. With a 2000 CFM maximum, this blower provides efficient air distribution without cycling on and off constantly, improving comfort consistency and humidity control.

Is R410A or R22 refrigerant better for this system? +

R410A is standard for new systems and more environmentally responsible. R22 is phased out by EPA regulations. Verify your coil and compressor support both options, though R410A delivers slightly better efficiency and is required for new installations in most jurisdictions.

Does the 10-year warranty protect my investment adequately? +

Ten years covers most component failures under normal operation. Register promptly after installation to activate coverage. Review the evaporator coil warranty specifics, as that's the most common failure point. Plan for eventual replacement around year 15-18 to avoid emergency downtime.

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