5 Ton 15 SEER 80% AFUE 100,000 BTU Goodman Gas Furnace and Air Conditioner System - Upflow Review 2026

// Bottom Line

This Goodman system works best for budget-conscious homeowners upgrading older equipment in moderate climates. The 80% AFUE furnace and 15 SEER cooling unit deliver respectable performance without premium pricing, though efficiency falls short of high-end competitors.

Review

The Goodman 5-ton upflow system represents a practical middle ground in the residential HVAC market. This dual-fuel combination pairs an 80% AFUE gas furnace with an air conditioning condenser rated at 15 SEER and 54,000 BTU cooling capacity. Marketed through Online Supply under SKU LS381183850, the system targets homeowners and contractors seeking Energy Star compliance without stepping into premium pricing tiers. The compact design and dual-airflow configuration make it adaptable to most existing ductwork layouts.

Performance metrics reflect honest mid-tier positioning. The furnace generates 100,000 BTU heat output through a two-stage burner, while the high-efficiency multi-speed blower reaches 2,000 CFM maximum airflow. Cooling delivers 54,000 BTU capacity with a scroll compressor and single-stage operation. The 73 dBA noise signature falls slightly above whisper-quiet models. Electrical requirements stay moderate at 208/230 volts, 1-phase, 60 Hz, with a 29.6-to-50 amp breaker range. R410A refrigerant and standard valve sizing ensure compatibility with typical installation practices.

Pros & Cons

Pros

Energy Star certified with 15 SEER cooling and 80% AFUE heating for solid baseline efficiency
Two-stage burner and high-efficiency multi-speed blower motor improve comfort and reduce short-cycling
5-ton capacity handles typical mid-size homes and light commercial applications effectively
Compact 21-by-21-by-30 inch footprint fits tight mechanical rooms and upflow/downflow configurations
10-year warranty with online registration provides reasonable long-term protection

Cons

80% AFUE lags behind 90-plus AFUE condensing furnaces, costing more to operate in heating-heavy climates
Single-stage condenser limits cycling efficiency compared to two-stage cooling units
73 dBA noise level ranks higher than quieter premium models, noticeable in living spaces

Who Should Buy

Best For

Homeowners replacing 15-to-20-year-old systems in mild-to-moderate climates who prioritize upfront savings over premium efficiency. Contractors needing reliable mid-grade equipment for rental properties and budget-conscious residential retrofits will find this system delivers predictable performance at a competitive price point.

Consider Alternatives If

Buyers in very cold climates should consider 90-plus AFUE condensing furnaces, and those in noise-sensitive areas should audition quieter alternatives before purchasing.

5 Ton 15 SEER 80% AFUE 100,000 BTU Goodman Gas Fur

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Installation

Installation proves straightforward for licensed technicians. The unit supports upflow and downflow configurations through its A-coil style design. Standard line sets accommodate 3/8-inch liquid and 1 1/8-inch suction lines with 1/2-inch insulation thickness. Metal exhaust flue is required for the gas furnace section. Compact dimensions (21-by-21-by-30 inches) ease placement in crowded mechanical closets. Technicians should verify 208/230 volt single-phase availability and confirm adequate breaker capacity before startup.

Warranty & Reliability

Goodman backs this system with a 10-year warranty upon online registration. Coverage includes parts and workmanship for the furnace, condenser, and included evaporator coil. Registration is essential, as non-registered units typically receive shorter protection periods. The warranty term aligns with mid-range industry standards. Buyers should retain documentation and proof of installation to validate claims and ensure registration deadline compliance.

Specifications

SKU	LS381183850
Brand/Manufacturer	Online Supply
Cooling BTU	54,000
Heating BTU	100,000
Refrigerant	R410A
Electrical	208 / 230 V. 1 Phase 60 Hz
Warranty	10 Years with Online Registration
Decibel Level (dBA)	73
Weight (in lbs)	48.000000
Feature	Spec
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
Height	30"
Width	21"
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.
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	50 amps
Min. Breaker Size	29.6 amps
Tonnage	5 Ton
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 the 80% AFUE compare to newer condensing furnaces? +

80% AFUE furnaces lose more heat through the exhaust flue than 90-to-98% AFUE condensing models. In heating-dominated regions, upgrading to a condensing furnace saves 10-15% annually on gas costs. For mild climates where heating is secondary, this efficiency gap narrows significantly. Calculate your payback period based on local heating degree days and natural gas pricing.

Can this unit replace my old R22 system? +

Yes, the R410A refrigerant charge and standard line sizes make this a direct replacement for most legacy R22 units. The 5-ton capacity matches typical residential systems. Ductwork inspection is recommended to ensure it handles 2,000 CFM airflow without excessive static pressure, which improves efficiency and comfort.

Is 15 SEER adequate for summer cooling? +

15 SEER represents solid performance for moderate climates. It exceeds minimum 13 SEER standards and qualifies as Energy Star certified. In hot, humid regions or homes with poor insulation, upgrading to 16-to-18 SEER models reduces strain on the compressor and lowers summer electric bills, though initial costs increase by 15-25 percent.

How does this compare to carrier and lennox mid-tier systems? +

Goodman typically prices 10-15% lower than Carrier and Lennox while delivering comparable performance in this efficiency tier. Reliability and part availability are similar across brands. Warranty terms slightly favor Carrier for extended coverage, though Goodman's 10-year registration-based warranty remains competitive and widely honored.

Do I need to register the warranty online? +

Yes, online registration with Goodman is mandatory to activate the full 10-year warranty. Without registration, coverage drops to 5 years. Registration takes 5-10 minutes and requires proof of installation date. Most contractors handle this during commissioning, but confirm before leaving the job site.

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