1.5 Ton 14 SEER 80% AFUE 80,000 BTU Goodman Gas Furnace and Air Conditioner System - Downflow Review 2026

// Bottom Line

This Goodman combo system excels for residential retrofit jobs where contractors need reliable, code-compliant equipment without premium pricing. The 14 SEER rating and 80% AFUE deliver respectable efficiency for mid-range installations where homeowners want predictable operating costs without enterprise-level equipment.

Review

The Goodman 1.5-ton gas furnace and air conditioner system represents the practical middle ground for residential HVAC replacement work. Online Supply markets this combo as a cost-effective option for contractors managing tight customer budgets while maintaining code compliance. At 14 SEER cooling capacity and 80% AFUE heating efficiency, this equipment sits firmly in the mainstream mid-range segment, neither cutting corners on core reliability nor pushing into premium performance tiers.

The cooling side delivers 18,000 BTU capacity through a single-stage rotary compressor running on R410A or R22 refrigerant. The heating side produces 80,000 BTU from a single-stage gas burner with 80% efficiency, using standard metal flue venting. The multi-speed PSC blower handles up to 1600 CFM, accommodating most residential ductwork configurations. Operation at 120V single-phase with 12 to 30-amp breaker sizing means straightforward electrical integration into existing residential panels without upgrades in most cases.

Pros & Cons

Pros

14 SEER cooling efficiency meets current regional standards in most US markets without oversizing costs
80% AFUE furnace is straightforward to install and service, with proven single-stage burner reliability
Multi-speed PSC blower motor delivers up to 1600 CFM, allowing flexibility in ductwork design
50-foot suction line with 3/4-inch insulation reduces field fabrication labor on typical residential jobs
10-year warranty with online registration provides meaningful protection at this price point

Cons

Single-stage compressor means higher cycling in variable load conditions compared to two-stage competitors
71 dB noise level is acceptable but audible, particularly during cooling season in quiet neighborhoods
80% AFUE lags current high-efficiency furnaces (95%+), resulting in higher long-term heating costs

Who Should Buy

Best For

Contractors installing replacement systems in budget-conscious residential markets, particularly in climates where cooling dominates. Homeowners upgrading 10-plus year old equipment who prioritize upfront savings over long-term efficiency gains.

Consider Alternatives If

Energy-conscious homeowners in cold climates should evaluate 95% AFUE furnaces instead, and those in high-electricity areas should compare variable-speed systems for better part-load cooling performance.

1.5 Ton 14 SEER 80% AFUE 80,000 BTU Goodman Gas Fu

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Installation

The downflow configuration with top flue location suits basement or closet installations typical in single-story homes. Standard 3/8-inch and 3/4-inch line sets reduce fitting inventory requirements. The A-coil design pairs directly with most existing furnace plenums. Installation complexity ranks moderate, requiring certified technicians for refrigerant handling but no unusual ducting or electrical work for standard residential applications.

Warranty & Reliability

Online Supply provides 10 years of parts coverage upon online registration, a standard offering in this equipment tier. Coverage includes the evaporator coil, addressing the most common mid-life failure point. The warranty lacks labor provisions, so homeowners should budget service call costs separately. This protection level matches competitor offerings at similar price points.

Specifications

SKU	LS38343850
Brand/Manufacturer	Online Supply
Cooling BTU	18,000
Heating BTU	80,000
Refrigerant	R410A or R22
Electrical	120 V. 1 Phase 60 Hz
Warranty	10 Years with Online Registration
Decibel Level (dBA)	71
Weight (in lbs)	22.000000
Feature	Spec
Energy Star	No
SEER1 (Efficiency)	14
Condenser Stages	Single Stage
Compressor Type	Rotary
Liquid Line	3/8"
Liquid Valve Size	3/8"
Suction Valve Size	3/4"
Max Breaker Size	30 amps
Min. Breaker Size	12 amps
Tonnage	3 Ton
Height	26"
Width	17.5"
Depth	21"
Resources	CAPF Installation Manual CAPF 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.
Exhaust Flue Requirement	Metal
Furnace Efficiency / AFUE	80%
Blower Motor	Multi Speed - PSC
Maximum CFM	1600
Configuration	Upflow / Downflow
Flue Location	Top
Burner Stages	Single
Fuel Type	Gas
Suction Line	3/4"
Style	A-Coil
Suction Line Insulation Thickness	3/4"
Length	50 feet

Frequently Asked Questions

How does 14 SEER compare to newer SEER2 ratings I see advertised? +

14 SEER1 roughly equals 11 SEER2 under updated testing standards. Current premium systems hit 16-18 SEER2. For cooling-dominant climates, the efficiency difference adds 15 to 20 percent to annual electricity costs versus high-efficiency competitors, justifying the lower initial price for budget buyers.

Can I use this system in an upflow furnace cabinet instead of downflow? +

Yes. The specs confirm upflow and downflow configuration compatibility. However, verify your existing cabinet matches the 26-inch height, 17.5-inch width, and 21-inch depth dimensions. Top flue location requires clearance above the unit, limiting some attic installations.

Is 80% AFUE adequate for northern climates with long heating seasons? +

80% AFUE works but costs more to operate than 95% AFUE systems. In regions with 6000-plus heating degree days, the ten-year cost difference can exceed $2000-3000 in gas bills. High-efficiency furnaces make financial sense when heating dominates your utility consumption.

How does the single-stage compressor affect comfort compared to two-stage systems? +

Single-stage compressors run at full capacity or off, cycling more frequently in mild weather. Two-stage systems modulate output, reducing cycling noise and improving humidity control. For comfort-focused buyers in variable climates, the performance difference justifies the upgrade cost.

What exactly does the 10-year warranty cover if I don't register online? +

Registration is required for the full 10-year term. Without registration, coverage likely defaults to manufacturer minimum, typically 5 years. Always register immediately after installation to activate complete protection.

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