3 Ton 14 SEER 96% AFUE 80,000 BTU Goodman Gas Furnace and Air Conditioner System - Horizontal Review 2026

// Bottom Line

This Goodman system is ideal for contractors and homeowners replacing attic-mounted or crawlspace units where horizontal clearance is limited. The 96% AFUE furnace and 16 SEER2 air conditioner deliver genuine efficiency gains that offset installation costs over 5-7 years, especially in moderate to cold climates.

Review

The Goodman 3-ton gas furnace and air conditioner system occupies a practical middle ground in the residential HVAC market. This horizontal configuration addresses a real installation constraint, filling space where traditional vertical units won't fit. Goodman's reputation for contractor-friendly pricing and straightforward service parts availability makes this an attractive option for replacement projects in established homes where ductwork runs through tight attics or low crawlspaces.

Efficiency numbers tell a solid story here. The furnace delivers 96% AFUE with dual-stage burners that modulate between high and low fire to match heating demand, translating to approximately 80,000 BTU of usable heat output per hour. The air conditioner side rates 16 SEER2 with 34,800 cooling BTU capacity using a scroll compressor and R410A or R22 refrigerant. The variable-speed ECM blower motor running up to 1,600 CFM ensures air distribution improves comfort while reducing short-cycling losses that waste energy in single-speed designs.

Pros & Cons

Pros

96% AFUE heating efficiency with two-stage burners reduces natural gas consumption by 15-20% versus older systems
16 SEER2 cooling rating provides legitimate energy savings for 3-ton capacity applications
Variable-speed ECM blower motor at 1,600 CFM maximum improves comfort and reduces cycling losses
PVC exhaust capability eliminates expensive concentric vent installation costs in tight spaces
Compact horizontal dimensions (21x21.125x26 inches) fit standard attic platforms and crawlspaces

Cons

Single-stage condenser limits part-load efficiency during mild weather compared to two-stage competitors
73.5 dBA noise level runs noticeably louder than premium variable-capacity models, noticeable during heating cycles
10-year warranty requires online registration, and parts coverage excludes evaporator coil failures beyond limited term

Who Should Buy

Best For

Contractors installing replacement systems in residential attics or tight crawlspaces where a compact horizontal unit saves retrofit costs. Budget-conscious homeowners in heating-dominant climates who want legitimate 90%+ efficiency without paying premium prices.

Consider Alternatives If

Homeowners in mild climates prioritizing cooling efficiency should consider two-stage condenser models, and those wanting whisper-quiet operation should compare variable-speed units that run below 72 dBA.

3 Ton 14 SEER 96% AFUE 80,000 BTU Goodman Gas Furn

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Installation

This unit requires 208/230V single-phase 60 Hz power with a 30-amp maximum breaker (18.7 amps minimum). The plastic PVC exhaust flue simplifies routing compared to traditional metal vents, a major advantage in attics. Horizontal orientation demands proper refrigerant line sizing using the included 3/8-inch liquid and 7/8-inch suction lines with 3/4-inch insulation thickness. Standard installation takes 4-6 hours for experienced HVAC technicians familiar with Goodman systems.

Warranty & Reliability

Goodman includes a 10-year parts warranty upon online registration, covering compressor, heat exchanger, and most internal components. This is competitive for mid-tier equipment but note that evaporator coil coverage is limited and requires separate documentation. Registration is mandatory to activate the full warranty period, so documentation at installation matters.

Specifications

SKU	LS38783850
Brand/Manufacturer	Online Supply
Cooling BTU	34,800
Heating BTU	80,000
Refrigerant	R410A or R22
Electrical	208 / 230 V. 1 Phase 60 Hz
Warranty	10 Years with Online Registration
Decibel Level (dBA)	73.5
Weight (in lbs)	30.000000
Feature	Spec
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	7368843
Airflow Direction	Downflow/Horizontal
Exhaust Flue Requirement	Plastic / PVC
Product Features	Rebate Available
Furnace Efficiency / AFUE	96%
Blower Motor	Variable Speed - ECM
Maximum CFM	1600
Configuration	Horizontal
Energy Star	Yes
Burner Stages	Two
Fuel Type	Propane, Natural Gas
Height	21"
Width	21.125"
Depth	26"
Resources	CHPF Installation Manual CHPF Specifications Sheet Goodman Evaporator Coil Warranty You will need Adobe® Acrobat® Reader to view PDF documents.
SEER1 (Efficiency)	16
Condenser Stages	Single Stage
Compressor Type	Scroll
Liquid Valve Size	3/8"
Suction Valve Size	7/8"
Max Breaker Size	30 amps
Min. Breaker Size	18.7 amps
Tonnage	3.5 Ton
Liquid Line	3/8"
Suction Line	7/8"
Style	A-Coil
Suction Line Insulation Thickness	3/4"
Length	50 feet

Frequently Asked Questions

How does 96% AFUE compare to my current furnace in real dollars? +

If replacing a 78% AFUE unit heating a 2,000 sq ft home, expect approximately 15-20% lower heating bills, typically $300-500 annually depending on natural gas rates and climate zone. The 80,000 BTU output matches most residential three-ton air conditioning systems, ensuring balanced heating and cooling.

Can this horizontal unit work in a tight attic where I have only 26 inches of vertical space? +

Yes, the 21-inch height plus ductwork clearance requires approximately 28-30 inches total. Confirm your actual attic opening and measure twice before ordering. The compact footprint is specifically designed for this constraint, making retrofits feasible where traditional upright cabinets fail.

Is 16 SEER2 cooling adequate for a three-ton system in hot climates? +

16 SEER2 is respectable for a single-stage condenser in moderate to hot climates, delivering solid efficiency during peak summer, though two-stage competitors reach 18-20 SEER2. The 34,800 cooling BTU output handles typical three-ton loads; your climate zone and home insulation determine adequacy more than equipment rating.

Should I choose R410A or R22 refrigerant for this system? +

R410A is standard in all new systems and required by EPA regulations since 2020. R22 availability is declining rapidly and phased out by 2030. Specify R410A unless you're retrofitting an existing R22 system and want compatibility, which reduces efficiency and increases costs unnecessarily.

What happens if I don't register the warranty online? +

Without registration, your warranty reverts to the manufacturer's limited coverage, typically 5 years instead of 10. Registration takes 10 minutes and requires your AHRI certificate number 7368843 and proof of installation. Do this before your technician leaves the job site.

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