5 Ton 15.5 SEER 80% AFUE 80,000 BTU Goodman Gas Furnace and Air Conditioner System - Horizontal Review 2026

// Bottom Line

This horizontal Goodman system works best for homeowners replacing older equipment in attics or crawlspaces who prioritize upfront savings without sacrificing reliability. At $2,071, it delivers competent heating and cooling for mid-size homes in moderate climates, backed by Goodman's solid reputation and 10-year coverage.

Review

The Goodman 5-ton horizontal system represents smart mid-market positioning in the HVAC replacement space. This combo unit pairs an 80,000 BTU furnace with a 60,000 BTU air conditioner, using proven scroll compressor technology and R410A refrigerant. At $2,071, it undercuts premium brands while maintaining Goodman's reputation for reliable, uncomplicated operation. The horizontal A-coil design specifically targets tight installations where vertical clearance or footprint matters, making it practical for attics and crawlspaces.

Performance-wise, the 80% AFUE rating meets federal efficiency baselines without excessive complexity, while the SEER16 cooling efficiency qualifies for ENERGY STAR recognition. Two-stage heating and cooling operation reduce short-cycling and deliver quieter, steadier climate control compared to single-stage units. The variable-speed blower motor adjusts between zero and 2,000 CFM depending on load, lowering electricity draw during partial-load operation. Requiring 208/230V single-phase power and between 37.2 to 60 amps keeps electrical upgrades minimal for most residential installs.

Pros & Cons

Pros

Two-stage burner and two-stage condenser provide modulating comfort and lower operating costs than single-stage units
Variable speed blower motor delivers up to 2,000 CFM with better efficiency than fixed-speed alternatives
80% AFUE heating efficiency meets federal minimum standards and qualifies for ENERGY STAR, reducing monthly fuel consumption
Horizontal A-coil configuration fits tight attic or crawlspace installations where vertical units won't fit
R410A refrigerant with scroll compressor is industry standard, ensuring technician familiarity and parts availability

Cons

80% AFUE lags behind high-efficiency units (95%+ AFUE) that save $300-500 yearly on heating, missing long-term ROI
SEER16 rating is respectable but trails premium units at SEER18+, meaning higher summer cooling costs in hot climates
75 dBA sound level at full capacity makes this louder than some competitors, noticeable in quiet neighborhoods
Requires metal exhaust flue, adding installation cost if your home lacks proper venting infrastructure

Who Should Buy

Best For

Homeowners in moderate climates looking to replace 15+ year old systems without major upgrades to ductwork or electrical service will find good value here. Contractors installing equipment for budget-conscious customers or rental properties appreciate Goodman's durability and straightforward service requirements.

Consider Alternatives If

Skip this if you live in extreme heat climates, run your AC constantly, or plan to stay in your home beyond 12 years, since higher-SEER units break even faster and deliver measurable comfort improvements.

5 Ton 15.5 SEER 80% AFUE 80,000 BTU Goodman Gas Fu

$2071

Buy at HVACDirect →

Installation

Installation fits standard horizontal applications with upflow capability. The unit weighs 301 pounds, requiring at least two technicians for safe handling. Metal exhaust flue is mandatory, so homes without existing metal venting infrastructure need ducting additions. Suction line measures 7/8 inches and liquid line 3/8 inches, standard copper sizes any licensed HVAC contractor stocks. Electrical connection is straightforward 208/230V single-phase, though breaker sizing between 37.2 and 60 amps requires panel assessment.

Warranty & Reliability

Goodman provides 10 years of parts and labor coverage when you register online, one of the longer terms at this price point. This protects against compressor failure, heat exchanger cracks, and component defects, though it does not cover refrigerant or routine maintenance. Registration is essential since coverage defaults to one year without it. Ten years typically covers most homeowner scenarios, outlasting average equipment tenure in moderate-use residential settings.

Specifications

SKU	DSXC160601
Brand/Manufacturer	Goodman
Cooling BTU	60,000
Heating BTU	80,000
Refrigerant	R410A
Electrical	208 / 230 V. 1 Phase 60 Hz
Warranty	10 Years with Online Registration
Decibel Level (dBA)	75
Weight (in lbs)	301.000000
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	Horizontal
Burner Stages	Two
Fuel Type	Propane, Natural Gas
Height	38.25"
Width	35.5"
Depth	35.5"
Resources	Goodman Specifications 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.
Liquid Line	3/8"
Suction Line	7/8"
Tonnage	5 Ton
Style	A-Coil
Energy Star	Yes
SEER1 (Efficiency)	16
Condenser Stages	Two Stage
Compressor Type	Scroll
Liquid Valve Size	3/8"
Suction Valve Size	7/8"
Max Breaker Size	60 amps
Min. Breaker Size	37.2 amps
Valve Type	Sweat

Frequently Asked Questions

What's the real-world heating output on natural gas versus propane? +

The 80,000 BTU rating holds steady for both fuels, though propane delivers slightly higher energy density per cubic foot. Most contractors recommend confirming your existing fuel line pressure and meter capacity during installation. Pressure regulators differ between fuel types, so specify your fuel source when ordering to ensure correct burner configuration.

Will this fit my attic space if I have limited height? +

At 38.25 inches tall and 35.5 inches wide and deep, the horizontal configuration works in tight attics where vertical units won't squeeze in. Measure your available space carefully and confirm airflow paths above and below won't obstruct. You'll need clearance for servicing the blower and heat exchanger annually.

How much will I save monthly compared to an older 60% AFUE furnace? +

At 80% AFUE, you gain 20 percentage points efficiency. On a 100,000 BTU heating load, expect 15 to 20 percent lower natural gas consumption, saving roughly $200 to 300 yearly in moderate climates. Actual savings depend on local gas rates and winter severity, but payback typically occurs within seven to ten years.

Is SEER16 enough or should I jump to SEER18? +

SEER16 handles moderate climates well with two-stage cooling efficiency. SEER18+ units save maybe $150 yearly in hot climates but cost $800 to 1,200 more upfront. If you're in the South or Southwest and running AC constantly, SEER18 pays off faster. For mild climates, SEER16 is sensible.

What does the 10-year warranty actually cover? +

Parts and labor on compressor, heat exchanger, coils, and electrical components when registered online. Excludes refrigerant, maintenance, and wear items. Most failures covered fall under compressor seals and heat exchanger defects, protecting your largest investments in the system.

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