5 Ton 15 SEER 96% AFUE 120,000 BTU Goodman Gas Furnace and Air Conditioner System - Upflow Review 2026

// Bottom Line

This 5-ton Goodman system delivers solid heating and cooling efficiency at an attractive price point, making it ideal for homeowners replacing older equipment or upgrading to variable-speed comfort. The 96% AFUE furnace and 16 SEER2 coil pair work well together for moderate climates, though the single-stage condenser limits peak efficiency gains.

Review

The Goodman 5-ton upflow system targets the sweet spot between budget consciousness and real efficiency upgrades. At $0, this SKU LS38783850 represents Online Supply's entry-level but capable offering, combining a 120,000 BTU furnace with an A-coil style evaporator. The 10-year warranty with online registration and AHRI certification (7368842) signal legitimate engineering. This unit works well in single-story homes or lower levels of split systems.

Performance numbers tell the real story here. The 96% AFUE furnace recovers nearly all combustion heat, far exceeding the 80-85% baseline of older equipment. The evaporator coil delivers 54,000 BTU cooling at 16 SEER2 efficiency, respectable for a scroll compressor system. Variable-speed ECM blower modulates up to 2000 CFM smoothly, eliminating the on-off blast of single-speed motors. Natural gas or propane fuel flexibility matters for rural installs. Two burner stages balance output between heating seasons.

Pros & Cons

Pros

96% AFUE furnace means heating costs drop noticeably compared to 80-90% units, saving hundreds annually
Variable-speed ECM blower motor adjusts to home needs, reducing energy waste and noise compared to single-speed alternatives
16 SEER2 rating on coil exceeds most contractor-grade equipment and qualifies for Energy Star certification
Two-stage burner provides modulating heat output for better comfort and efficiency during mild weather
PVC exhaust option simplifies installation in homes without traditional masonry chimneys

Cons

Single-stage condenser limits cooling efficiency in extreme heat situations, unlike two-stage alternatives available at modest price increase
73 dBA noise level runs louder than premium variable-capacity systems, noticeable during heating cycles
R410A refrigerant handling requires EPA certification, adding to installation labor costs and limiting DIY work

Who Should Buy

Best For

Homeowners in moderate climates replacing 15-to-20-year-old furnace and AC units who want meaningful efficiency gains without top-tier pricing. Contractors stocking rental or builder accounts will appreciate the straightforward upflow configuration and quick turnaround specs.

Consider Alternatives If

Anyone in hot climates needing peak cooling capacity or those seeking whisper-quiet operation should explore two-stage condensers or inverter-driven alternatives.

5 Ton 15 SEER 96% AFUE 120,000 BTU Goodman Gas Fur

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Installation

Upflow/horizontal configuration fits basement or attic mounting without ductwork rework. PVC plastic exhaust simplifies venting through external walls, avoiding chimney tie-ins. Electrical demand runs 208/230V single-phase, standard for most homes. Minimum 29.6-amp breaker and maximum 50-amp breaker sizing provide flexibility. Refrigerant lines use standard 3/8-inch liquid and 7/8-inch suction sizes with 3/4-inch insulation wrap included for the full 50-foot length.

Warranty & Reliability

Goodman's 10-year warranty activates with online registration, covering parts and labor defects. This matches most mid-tier brands but trails extended options some competitors offer. Evaporator coil carries separate extended coverage. Standard duration means homeowners should budget for potential repairs after year seven, though scroll compressors typically outlast the warranty.

Specifications

SKU	LS38783850
Brand/Manufacturer	Online Supply
Cooling BTU	54,000
Heating BTU	120,000
Refrigerant	R410A
Electrical	208 / 230 V. 1 Phase 60 Hz
Warranty	10 Years with Online Registration
Decibel Level (dBA)	73
Weight (in lbs)	30.000000
Feature	Spec
AHRI Certificate Number	7368842
Airflow Direction	Upflow/Horizontal
Exhaust Flue Requirement	Plastic / PVC
Product Features	Rebate Available
Furnace Efficiency / AFUE	96%
Blower Motor	Variable Speed - ECM
Maximum CFM	2000
Configuration	Upflow / Downflow
Energy Star	Yes
Burner Stages	Two
Fuel Type	Propane, Natural Gas
Height	30"
Width	24.5"
Depth	21"
Resources	CAPT Installation Manual CAPT 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.
SEER1 (Efficiency)	16
Condenser Stages	Single Stage
Compressor Type	Scroll
Liquid Valve Size	3/8"
Suction Valve Size	7/8"
Max Breaker Size	50 amps
Min. Breaker Size	29.6 amps
Tonnage	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 much can I expect to save on heating costs versus my old furnace? +

A 96% AFUE system saves approximately 15-20% on heating fuel annually compared to a 78-80% unit. For a $1,200 annual heating bill, expect $180-240 savings yearly. Payback depends on installation cost and local gas rates, typically 5-8 years in moderate climates. Energy Star qualification confirms these efficiency gains independently.

Do I need special ducting or can this fit my existing system? +

The 2000 CFM maximum airflow works with standard residential ductwork. Upflow configuration requires basement or utility closet placement with overhead plenum access. If your home uses horizontal ductwork in attics, verify space before ordering. PVC exhaust pipes route through walls easily, but schedule professional measurements first.

What makes the variable-speed blower different from my current furnace? +

Your old furnace likely uses a single-speed motor running full blast whenever heating kicks on. This ECM blower ramps up and down with heating demand, running quietly at lower speeds during mild weather. Result: 10-15% better efficiency, less temperature swings, and noticeably quieter operation. The difference becomes obvious the first heating season.

How does 16 SEER2 compare to competitor systems at this price? +

SEER2 is the newer, stricter efficiency standard replacing SEER1. A 16 SEER2 rating competes well against 17-18 SEER1 equivalents from Carrier or Lennox in this budget tier. Single-stage condenser limits peak efficiency versus two-stage alternatives, but the scroll compressor reliability is proven. Most homeowners see $400-600 annual cooling savings versus 13 SEER equipment.

What happens if this unit breaks down after 10 years? +

Goodman parts remain affordable and widely stocked. Most failures involve blower motors, contactors, or capacitors, typically $200-500 to repair. Scroll compressors rarely fail before year 15. After warranty expiration, repairs remain cheaper than premium brands, making this unit cost-effective over 15-20 year lifespan.

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