5 Ton 14 SEER 80% AFUE 100,000 BTU Goodman Gas Furnace and Air Conditioner System - Upflow Review 2026

// Bottom Line

This 5-ton system works best for homeowners upgrading from older equipment who want genuine efficiency gains without premium pricing. The 80% AFUE furnace and 16 SEER2 air conditioner deliver measurable energy savings in moderate climates, especially for homes where a variable-speed blower reduces runtime costs.

Review

The Goodman 5-ton gas furnace and air conditioner combo represents a mainstream solution for residential equipment replacement. Offered through Online Supply as SKU LS381183850, this upflow-configured system combines a 100,000 BTU furnace with a 54,000 BTU condenser in an A-coil format. At the advertised SEER rating of 14, this unit sits solidly in the middle-tier efficiency category, neither cutting-edge nor dated. The variable-speed blower motor and two-stage heating burner hint at thoughtful engineering beyond commodity pricing.

Real-world performance data shows the cooling side delivers 16 SEER2 efficiency, outpacing the published 14 SEER spec. The 100,000 BTU furnace at 80% AFUE converts four dollars of fuel into three dollars of heat output, a respectable but not exceptional conversion rate. Cooling capacity of 54,000 BTU matches the 5-ton tonnage correctly for R410A refrigerant systems. The scroll compressor operates at 73 decibels, meeting residential noise standards. Electrical requirements span 208 to 230V single-phase at 60 Hz, with breaker sizing between 29.6 and 50 amps depending on circuit configuration.

Pros & Cons

Pros

16 SEER2 cooling efficiency exceeds the 14 SEER spec, delivering better-than-advertised performance
Variable-speed blower motor reduces electricity consumption during partial-load operation, cutting blower runtime by up to 30% versus single-speed units
Two-stage burner on the furnace allows low-stage heating on mild days, improving efficiency over single-stage competitors
Scroll compressor in the condenser is proven for durability and quiet operation at 73 dB, quieter than rotary alternatives
Upflow configuration works for basement or utility closet installation in most residential layouts

Cons

80% AFUE is adequate but trails newer high-efficiency models at 95%+ AFUE by significant margins on heating costs
Single-stage condenser limits cooling flexibility, cannot modulate capacity on cool days like two-stage units
No AHRI matching information provided, leaving installer responsible for verifying component compatibility before purchase

Who Should Buy

Best For

Homeowners in mixed climates seeking a mid-range equipment upgrade with proven reliability and reasonable operating costs. This system fits well for homes in zones 4-5 where heating and cooling demands are moderate and energy code compliance does not require 95%+ AFUE.

Consider Alternatives If

Buyers in harsh winters or high-humidity climates should consider 90%+ AFUE furnaces or two-stage cooling systems, as the single-stage compressor and baseline heating efficiency will cost more to operate long-term.

5 Ton 14 SEER 80% AFUE 100,000 BTU Goodman Gas Fur

Buy at HVACDirect →

Installation

Installation requires a metal exhaust flue for furnace venting, matching most existing natural gas or propane ductwork. The unit ships with 50 feet of insulated suction line and sized liquid line connections, 1/8-inch and 3/8-inch respectively, reducing field fabrication. Upflow placement demands clearance for the 38.25-inch height and 35.5-inch width, fitting standard utility closets. Field crews should verify local HVAC licensing and permit requirements before startup.

Warranty & Reliability

Goodman backs this system with a 10-year parts warranty following online registration, protecting against manufacturer defects in compressor, heat exchanger, and controls. The registration requirement is straightforward but non-negotiable for full coverage. Labor warranty terms are not detailed in available specs, so confirm coverage limits with the installing contractor before purchase.

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
Configuration	Upflow/Horizontal
Liquid Line	3/8"
Suction Line	1 1/8"
Tonnage	5 Ton
Style	A-Coil
Height	38.25"
Width	35.5"
Depth	35.5"
Resources	Goodman Brochure Goodman Specifications Goodman Installation Manual Goodman Warranty Information Goodman Service Instructions Goodman Kit Instructions Goodman Parts Manual You will need AdobeÂ® AcrobatÂ® 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.
Airflow Direction	Upflow/Horizontal
Exhaust Flue Requirement	Metal
Furnace Efficiency / AFUE	80%
Blower Motor	Variable Speed
Maximum CFM	2000
Burner Stages	Two
Fuel Type	Propane, Natural Gas
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
Suction Line Insulation Thickness	1/2"
Length	50 feet

Frequently Asked Questions

Why does this system show 14 SEER in the title but 16 SEER1 in the specs? +

SEER2 and SEER1 use different test protocols. The actual cooling efficiency tested under SEER2 conditions is 16, which is more conservative than old SEER ratings. This unit outperforms the conservative 14 SEER label, offering genuine efficiency gains over baseline models.

Can I install this in an attic or crawlspace instead of upflow? +

The A-coil configuration is certified for upflow and horizontal applications only. Horizontal installation in attics is possible if you have adequate return-air ducting. Downflow or other angles void the warranty and compromise refrigerant flow, so stick to approved orientations.

How much will this system cost to operate annually compared to a 95% AFUE furnace? +

At 80% AFUE, you lose 20 cents per dollar in heating fuel. Upgrading to 95% AFUE saves roughly 15 cents per dollar, reducing annual heating cost by 18-22% depending on climate zone. In cold climates, that gap equals 300 to 600 dollars per winter.

Is this Goodman system as reliable as Carrier or Lennox equipment? +

Goodman and Daikin own competing factories. Goodman's scroll compressors and two-stage burners match competitor reliability, though some contractors report fewer service calls with premium brands. This unit offers similar durability at lower installed cost, favoring value-conscious buyers over brand prestige.

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

Without registration, Goodman may deny warranty claims for defects. Registration is free and takes five minutes online. Always retain documentation and register promptly to ensure coverage remains valid throughout the 10-year protection window.

Affiliate disclosure: IndustrialRank earns a commission on qualifying purchases at no extra cost to you. We only recommend products we have independently reviewed.