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

// Bottom Line

This horizontal Goodman system works best for homeowners upgrading older furnaces who want reliable cooling and heating without premium pricing. At $2,053, it delivers genuine value for mixed climates where you need both functions equally.

Review

The Goodman 2.5-ton horizontal system sits comfortably in the mainstream HVAC market, offering no-frills cooling and heating without luxury pricing. At $2,053, it competes directly with other builder-grade equipment that fills rental properties, modest homes, and budget-conscious replacements. Online Supply's SKU LS38783850 carries Goodman's solid reputation for durability, though this isn't their premium tier. The horizontal configuration makes it the practical choice for installations where vertical space doesn't exist, a real advantage in cramped attics or crawlspaces.

The furnace delivers 80,000 BTU of heating at 80% AFUE, which meets minimum efficiency codes but trails high-efficiency competitors by 10-15 percentage points. Cooling output reaches 29,000 BTU at 16 SEER1, earning Energy Star status and AHRI certification number 204633302. The dual-stage burner and variable-speed 2000 CFM blower motor work together to smooth temperature swings. Single-stage scroll compressor keeps cooling straightforward and repair-friendly, though it lacks the modulation advantages of two-stage units. You'll see moderate utility savings over truly old equipment, though not the dramatic drops that 95% AFUE furnaces provide.

Pros & Cons

Pros

Energy Star certified with 80% AFUE furnace efficiency and 16 SEER cooling rating
Dual-stage burner system improves comfort by modulating heat output rather than running full blast
Variable-speed blower motor reduces runtime noise and energy consumption
Horizontal configuration fits tight attic or crawlspace installations where vertical units won't work
Scroll compressor is proven reliable technology with lower repair costs than rotary units

Cons

80% AFUE is baseline efficiency, not premium, meaning higher gas bills than 95%+ AFUE models
Single-stage cooling compressor cycles on and off rather than modulating, less efficient than variable-capacity units
71.5 dB noise level is audible during operation, noticeably louder than inverter-driven competitors

Who Should Buy

Best For

Homeowners replacing 15+ year old systems in moderate climates who prioritize affordability and don't need cutting-edge efficiency. Contractors installing budget-conscious residential retrofits where the existing ductwork supports 80,000 BTU heating demands.

Consider Alternatives If

Buyers in cold climates seeking maximum heating efficiency should choose 90%+ AFUE models, and those wanting whisper-quiet operation should look at inverter-driven systems.

2.5 Ton 15 SEER 80% AFUE 80,000 BTU Goodman Gas Fu

$2053

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Installation

Horizontal orientation requires proper condensate drainage and support brackets to prevent sag over time. Requires 120V single-phase 60Hz power with 17.1 to 25 amp breaker service, well within standard household panels. Suction line insulation thickness of 3/4 inch and 50-foot maximum line set limit placement to roughly 50 feet from outdoor condenser. Metal exhaust flue requirement means existing chimneys or new venting must be metal, not plastic PVC.

Warranty & Reliability

10-year warranty with online registration covers defects in parts and workmanship, a standard protection period for mid-market equipment. Registration requirement means buyers must take action within a defined window or lose coverage. Goodman evaporator coil warranty separate documentation available, typical for refrigeration components. This warranty matches competitors at this price point but falls short of extended protection plans some premium brands offer.

Specifications

SKU	LS38783850
Brand/Manufacturer	Online Supply
Cooling BTU	29,000
Heating BTU	80,000
Refrigerant	R410A or R22
Electrical	120 V. 1 Phase 60 Hz
Warranty	10 Years with Online Registration
Decibel Level (dBA)	71.5
Weight (in lbs)	30.000000
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	25 amps
Min. Breaker Size	17.1 amps
Tonnage	3.5 Ton
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.
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	Horizontal
Burner Stages	Two
Fuel Type	Propane, Natural Gas
Liquid Line	3/8"
Suction Line	7/8"
Style	A-Coil
Suction Line Insulation Thickness	3/4"
Length	50 feet

Frequently Asked Questions

How much will this system lower my monthly heating and cooling bills? +

Savings depend on your current equipment age and efficiency. Upgrading from a 1995-era 60% AFUE furnace could save 25-30% on heating costs. The 16 SEER1 cooling provides modest improvement over 13-14 SEER units. Expect 15-20% total HVAC savings in mixed climates, less in heating-dominant regions.

Can I install this myself or do I need a licensed contractor? +

Refrigerant handling and electrical work require EPA certification and contractor licensing in most states. Horizontal ductwork integration also demands proper airflow calculations. Hire licensed professionals for safety, warranty validity, and code compliance. Installation labor typically costs $1,500-2,500 additional.

What's the difference between this 16 SEER model and higher SEER options I've seen? +

Higher SEER ratings (18-24) use variable-capacity compressors, advanced controls, and better insulation that add $800-1,500 to equipment cost. This single-stage unit cycles fully on and off, working harder than modulating competitors. Higher SEER models deliver 20-25% better cooling efficiency, justifying their premium if you run AC heavily.

Is 80% AFUE furnace efficiency good enough, or should I pay more for 95%? +

80% AFUE meets code and saves money upfront, but 95% AFUE saves $200-300 annually in heating bills. Over a 15-year lifespan, that's $3,000-4,500 in fuel savings, often exceeding the $1,200-1,800 equipment premium. High-efficiency makes financial sense in cold climates, less critical in mild regions.

What happens if this unit breaks down after five years? +

The 10-year parts and labor warranty covers defects, so repair costs are zero. Non-defect failures after warranty expiration depend on the issue. Scroll compressor replacement runs $800-1,200 plus labor. Choose a contractor with local service techs and parts inventory for faster repairs.

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