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

// Bottom Line

This Goodman system is best for homeowners in moderate climates looking to replace an older furnace without premium pricing. The 80% AFUE heating and 15 SEER cooling deliver respectable efficiency gains, while the $2,071 price point makes it accessible for budget-conscious contractors and DIY installations.

Review

Goodman's 5-ton upflow system represents the practical middle ground in HVAC replacement. At $2,071, it undercuts premium brands while delivering 80,000 BTU heating capacity and 54,000 BTU cooling in a compact 30-inch-tall cabinet. The A-coil configuration, variable-speed blower, and dual-stage furnace appeal to contractors who value straightforward installation and homeowners watching their budget. This unit occupies the tier where most replacements happen: above builder-grade equipment but below high-efficiency systems.

Performance specs tell a mixed efficiency story. The 80% AFUE furnace is respectable but trails modern 95% units by roughly 15 percentage points in heating conversion. The 15 SEER cooling rating (16 SEER1 measured under newer standards) handles moderate load homes adequately, though single-stage operation means no capacity modulation. The variable-speed blower running up to 2000 CFM helps distribute air more evenly than fixed-speed motors. Real-world heating costs will depend on propane versus natural gas pricing and local winter severity.

Pros & Cons

Pros

80% AFUE furnace with dual-stage burners reduces heating costs compared to 70-75% units, especially in heating-dominant climates
15 SEER cooling (or 16 SEER1 per specs) qualifies for ENERGY STAR and matches mid-tier efficiency expectations
Variable-speed blower motor (2000 CFM max) provides better comfort control and quieter operation than single-speed alternatives
Two-stage heating and single-stage cooling simplify maintenance and reduce component failure risk
10-year warranty with online registration offers solid protection for the investment

Cons

80% AFUE is outdated compared to 95%+ AFUE units now available, missing high-efficiency rebates in many regions
73 dBA noise level is noticeably louder than premium variable-capacity systems, which run 65-68 dBA
Single-stage cooling cannot modulate capacity, wasting energy on oversized load days in mild weather

Who Should Buy

Best For

Homeowners replacing 25+ year old furnaces in climates with genuine winter heating needs, or contractors serving price-sensitive customers who prioritize upfront cost over long-term utility savings. This system makes sense where heating dominates the annual load.

Consider Alternatives If

Anyone in mild climates (South, Southwest) where cooling dominates, or buyers who plan to stay in their home 15+ years and want efficiency rebates. Upgrading to 95% AFUE will pay back faster in northern regions.

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

$2071

Buy at HVACDirect →

Installation

Upflow configuration suits basements and crawl spaces where the unit sits below ductwork. The 208/230V single-phase electrical requirement needs 29.6 to 50 amp breaker sizing, standard for most homes. Metal flue exhaust ducting is mandatory. Liquid and suction lines use standard 3/8-inch and 1 1/8-inch copper with 1/2-inch suction insulation included. Weight at 48 pounds makes solo installation manageable but team installation reduces injury risk.

Warranty & Reliability

The 10-year warranty requires online registration and covers parts against defects. This duration is industry standard and provides reasonable financial protection for a $2,071 unit. However, coverage typically excludes labor, refrigerant, and damage from improper installation. Extended warranties are usually available through retailers, though cost-benefit depends on installer reputation and local repair prices.

Specifications

SKU	LS381183850
Brand/Manufacturer	Online Supply
Cooling BTU	54,000
Heating BTU	80,000
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
AHRI Certificate Number	204633307
Airflow Direction	Upflow/Horizontal
Exhaust Flue Requirement	Metal
Furnace Efficiency / AFUE	80%
Blower Motor	Variable Speed
Maximum CFM	2000
Configuration	Upflow / Downflow
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.
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 80% AFUE compare to newer furnaces? +

80% AFUE converts four-fifths of fuel to usable heat, losing 20% up the flue. Modern 95% AFUE units lose only 5%, making them $300-500 per year cheaper in cold climates. However, 80% units cost $400-800 less upfront, breaking even in 4-5 years depending on heating degree days.

Will this system work in my climate? +

Yes, but appropriateness depends on heating versus cooling balance. In zones 4-7 with real winters, the 80,000 BTU furnace delivers good value. In zones 1-2 (South), the single-stage cooling becomes wasteful since oversized capacity runs at full power even on 70-degree days.

What does the 15 SEER cooling rating mean in practice? +

15 SEER indicates mid-tier efficiency. A comparable unit at 18 SEER would use roughly 17% less cooling electricity. For a home using 3000 cooling hours yearly, that's roughly $80-120 annual savings, totaling $1,200-1,800 over 15 years. The upfront efficiency premium is $400-600.

How does this compare to competing 5-ton brands? +

Goodman occupies the same segment as Amana and Maytag: reliable, budget-friendly, less refined than Lennox or Carrier. This unit's variable-speed blower distinguishes it from true budget models, adding comfort without luxury pricing. Build quality matches other Goodman products.

Is the 10-year warranty enough protection? +

Yes for typical ownership. Most furnace failures occur years 1-3 or after year 12. The 10-year window covers the highest-risk repair period. Factor in labor costs, which typically double parts prices, when evaluating extended coverage.

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