Review
The Goodman 3 Ton 14 SEER 80% AFUE system occupies the practical middle ground in residential HVAC, offering proven technology without premium pricing. This is the workhorse unit contractors install when customers want reliable operation over cutting-edge efficiency. Goodman's manufacturing scale and parts availability have made systems like this durable performers in the field for 15+ years. The upflow A-coil configuration suits traditional attic installations common across most residential markets.
Cooling performance comes from a 36,000 BTU scroll compressor running at single-stage, delivering 14 SEER efficiency for moderate climate duty. Heating reaches 80,000 BTU across two burner stages, providing 80% AFUE with modulation flexibility for better part-load performance. The multi-speed blower reaching 2,000 CFM adapts to various ductwork designs without requiring extensive balancing. Electrical demand stays reasonable at a 30-amp maximum breaker, accommodating most existing home electrical panels without upgrades.
Pros & Cons
Pros
- 14 SEER cooling efficiency delivers solid energy savings compared to older 10-12 SEER units, translating to measurable utility bill reductions
- Two-stage burner with 80,000 BTU heating capacity provides flexible modulation for better comfort and efficiency during shoulder seasons
- 36,000 BTU cooling capacity pairs effectively with the 3.5 ton compressor for residential applications up to approximately 1,400-1,600 sq ft
- Multi-speed blower motor allows contractor configuration for optimal airflow matching, reducing ductwork strain and improving distribution
- Upflow A-coil configuration works in standard attic or crawlspace installations where horizontal mounting isn't feasible
- Two-bearing scroll compressor design is proven durable across thousands of hours of operation in residential duty cycles
Cons
- 80% AFUE is functional but dated, missing the 90%+ efficiency gains available in modern condensing furnaces that reduce gas consumption 10-15%
- Single-stage condenser means the AC runs at full capacity even during mild conditions, reducing efficiency gains on shoulder season days
- Not Energy Star certified, meaning it doesn't qualify for some rebate programs that require 16 SEER cooling or higher
- 73 dB operating noise is audible, particularly noticeable in quiet living spaces compared to 70 dB or lower units
- R22 refrigerant option creates future servicing costs and phase-out concerns, though R410A standard is more secure long-term
Who Should Buy
Best For
Contractors building spec homes in price-sensitive markets and homeowners replacing failing systems on modest budgets will appreciate this unit's straightforward performance and installation simplicity. It's ideal when upfront cost matters more than extracting maximum efficiency gains.
Consider Alternatives If
Buyers in cold climates should avoid the 80% AFUE furnace in favor of 95%+ condensing models, and those in California or strict efficiency states should look at 16+ SEER units to meet evolving standards.
Installation
This system fits standard residential installations with upflow/horizontal orientation. The 21-inch width and 34.5-inch height allow placement in typical utility closets or attic spaces. Suction and liquid lines use standard 3/4-inch and 3/8-inch sizes, and the 30-foot line set length covers most residential distances from outdoor condenser to indoor coil. Metal exhaust flue requirement means standard gas furnace venting applies without complications.
Warranty & Reliability
Goodman backs this system with a 10-year parts warranty when buyers register online, protecting against compressor and component failures during the critical first decade. This coverage is standard for non-premium units, offering decent protection but lacking the extended warranties available on higher-priced models. Registration is straightforward and recommended immediately after installation.
Specifications
| SKU | LS38343830 |
| Brand/Manufacturer | Online Supply |
| Cooling BTU | 36,000 |
| Heating BTU | 80,000 |
| Refrigerant | R410A or R22 |
| Electrical | 120 V. 1 Phase 60 Hz |
| Warranty | 10 Years with Online Registration |
| Decibel Level (dBA) | 73 |
| Weight (in lbs) | 35.000000 |
| Feature | Spec |
| Energy Star | No |
| SEER1 (Efficiency) | 14 |
| Condenser Stages | Single Stage |
| Compressor Type | Scroll |
| Liquid Line | 3/8" |
| Suction Line | 3/4" |
| Liquid Valve Size | 3/8" |
| Suction Valve Size | 3/4" |
| Max Breaker Size | 30 Amps |
| Min. Breaker Size | 18.7 Amps |
| Tonnage | 3.5 Ton |
| Height | 34.5" |
| Width | 21" |
| Depth | 28.75" |
| Resources | Goodman Brochure Goodman Installation Manual Goodman Parts Manual Goodman Service Manual Goodman Specifications Goodman Technical Information Goodman User Information Goodman 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. |
| Configuration | Upflow/Horizontal |
| Style | A-Coil |
| Airflow Direction | Upflow/Horizontal |
| Exhaust Flue Requirement | Metal |
| Furnace Efficiency / AFUE | 80% |
| Blower Motor | Multi-Speed |
| Maximum CFM | 2000 |
| Burner Stages | Two |
| Fuel Type | Gas |
| Suction Line Insulation Thickness | 3/4" |
| Length | 30 feet |
Frequently Asked Questions
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