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

// Bottom Line

This Goodman system works well for contractors seeking a straightforward, affordable 5-ton split system without premium efficiency demands. It's best suited for moderate climates or budget-conscious homeowners willing to accept 80% AFUE heating and 14 SEER cooling in exchange for lower upfront costs.

Review

The Goodman 5-ton gas furnace and air conditioner combination occupies a practical middle ground in the residential HVAC market. Priced aggressively and bearing the online retailer Online Supply label, this system targets contractors and homeowners prioritizing upfront affordability over premium efficiency ratings. The upflow configuration accommodates most standard residential installations, while the compact 30-by-21-by-21-inch dimensions ease placement in tight mechanical spaces.

This unit delivers 100,000 BTU of heating output with an 80% AFUE rating, meaning one dollar in fuel produces 80 cents of heat. The cooling side generates 60,000 BTU at 14 SEER, using R410A refrigerant in a scroll compressor configuration. Airflow reaches 2,000 CFM maximum with a high-efficiency multi-speed blower. At 75 dB, operational noise stays reasonable for residential use. The two-stage heating burner modulates capacity, improving comfort during partial-load conditions.

Pros & Cons

Pros

Two-stage burner on furnace side allows modulated heating, reducing short-cycling and improving comfort in moderate weather
14 SEER cooling hits the sweet spot between efficiency and affordability, roughly 15-20% better than baseline 13 SEER units
100,000 BTU heating capacity handles most residential applications in cold climates without oversizing
High-efficiency multi-speed blower motor adapts to different ductwork static pressures and minimizes energy waste
Compact 30-inch cube footprint fits standard utility closets and mechanical rooms with minimal clearance issues

Cons

80% AFUE is entry-level by modern standards, leaving 20% of fuel energy as waste compared to 95%+ high-efficiency units
Single-stage air conditioning compressor runs full-bore or not at all, reducing part-load efficiency during mild weather
Requires metal flue exhaust, limiting installation flexibility in some retrofit scenarios with masonry or PVC constraints
No Energy Star certification indicates it doesn't meet top-tier environmental standards

Who Should Buy

Best For

Contractors installing replacement systems in homes where efficiency rebates don't apply, and homeowners in moderate climates seeking reliable equipment at mid-range pricing. This system works especially well when existing ductwork and infrastructure are compatible with upflow configuration.

Consider Alternatives If

Buyers in harsh northern climates where 80% AFUE translates to significantly higher heating bills, or environmentally conscious homeowners willing to invest in 96% AFUE furnaces and 18+ SEER air conditioning.

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

Buy at HVACDirect →

Installation

Installation requires 208 or 230V single-phase 60 Hz electrical service, with a minimum 32.8-amp breaker and maximum 50-amp capacity. Suction and liquid lines use standard 7/8-inch and 3/8-inch connections respectively, with 3/8-inch insulation on suction lines. Metal flue exhaust is mandatory. Upflow/horizontal airflow direction suits basement and utility closet placements. Most qualified technicians complete installation in four to six hours.

Warranty & Reliability

Goodman provides a 10-year parts warranty upon online registration. This covers compressor, coil, and heat exchanger defects but excludes labor. Registration is straightforward and typically completed during initial startup. For commercial or rental properties, warranty terms may differ, so verify applicability before purchase.

Specifications

SKU	LS38783830
Brand/Manufacturer	Online Supply
Cooling BTU	60,000
Heating BTU	100,000
Refrigerant	R410A
Electrical	208 / 230 V. 1 Phase 60 Hz
Warranty	10 Years with Online Registration
Decibel Level (dBA)	75
Weight (in lbs)	30.000000
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	No
SEER1 (Efficiency)	14
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	32.8 amps
Tonnage	5 Ton
Liquid Line	3/8"
Suction Line	7/8"
Style	A-Coil
Suction Line Insulation Thickness	3/8"
Length	30 feet

Frequently Asked Questions

How does 80% AFUE compare to newer high-efficiency furnaces? +

80% AFUE is entry-level modern equipment. Units rated 90-96% AFUE recover exhaust heat, reducing fuel consumption by 10-16 percentage points. In cold climates, high-efficiency models pay back through lower utility bills within 5-7 years, despite higher purchase costs.

Can this system retrofit into homes with PVC exhaust venting? +

No. This furnace requires metal flue exhaust, so homes with PVC venting need either ductwork conversion or a different furnace model. Metal venting handles combustion byproducts properly and meets code in most jurisdictions.

What's the real-world efficiency difference between 14 SEER and 16 SEER air conditioning? +

14 SEER costs roughly 10-15% less upfront than 16 SEER but consumes approximately 12-15% more cooling energy annually. In moderate climates with 500-800 cooling hours yearly, the savings may take 8-12 years to accumulate.

Should I choose this system or a Carrier or Lennox equivalent? +

Goodman components are comparable in reliability to premium brands at significantly lower cost. You trade slightly lower efficiency and fewer advanced features for affordability. Carrier 25HNE45 (16 SEER) is more efficient but costs 25-40% more installed.

What happens after the 10-year warranty expires? +

Warranty coverage ends, and repair costs become your responsibility. Most compressors and coils last 15-20 years with proper maintenance, but costs can exceed $2,500 for major component replacement.

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