Review
The Goodman 3 Ton Gas Furnace and Air Conditioner System sits squarely in the practical middle of the residential market. At $736, this upflow A-coil configuration combines modulating heating with two-stage cooling, targeting homeowners and contractors who want measurable efficiency gains without luxury pricing. Goodman's reputation for straightforward engineering rather than bells-and-whistles features makes this unit popular for replacement work and new construction where budgets matter but performance cannot slip.
Performance numbers tell the real story. The system delivers 80,000 BTU heating output at 97% AFUE, meaning nearly all fuel converts to usable heat. On the cooling side, 35,000 BTU capacity with SEER 18 efficiency beats many competitor base models. The variable-speed ECM blower motor works with both stages to optimize airflow across your home, while the scroll compressor runs at 71 dB, keeping noise reasonable. R410A refrigerant compatibility ensures you avoid obsolescence if regulations shift further.
Pros & Cons
Pros
- Modulating burner stages adjust heat output continuously, reducing on-off cycling and improving comfort
- SEER 18 cooling efficiency and 97% AFUE heating meet Energy Star standards for both seasons
- Variable-speed ECM blower motor fine-tunes airflow and cuts electricity costs compared to single-speed alternatives
- Two-stage scroll compressor operates quietly at 71 dB and extends equipment lifespan through reduced stress
- Price of $736 is aggressive for a complete system with 10-year registered warranty
- A-coil configuration and upflow design suit most retrofit applications without major ductwork changes
Cons
- SEER 18 is solid but not premium tier, missing the 19+ ratings of higher-end units
- Limited to 115V single-phase power, which is fine for residential but rules out commercial installs
- No information on noise levels during heating cycle, only cooling specifications provided
- Requires PVC exhaust flue, which means installation costs if you have older masonry venting
Who Should Buy
Best For
Homeowners replacing worn furnace-AC combos who prioritize balanced efficiency and affordability. Contractors stocking inventory for mid-range residential jobs where clients want modern performance without premium pricing will find this system competitively positioned.
Consider Alternatives If
Commercial properties or anyone needing three-phase power should look elsewhere, as this unit tops out at 115V single-phase.
Installation
This unit needs standard residential electrical service: 115V single-phase 60Hz with breaker sizing between 21.3 and 35 amps. The upflow configuration fits most closets or utility spaces with its 34.5-inch height and 21-inch width. You will need to run PVC exhaust flue to the exterior, a straightforward addition if your home has adequate venting routes. Suction and liquid lines come sized at 7/8-inch and 3/8-inch respectively, which most contractors can accommodate without special fabrication.
Warranty & Reliability
Coverage runs 10 years when you register the unit online after installation. This matches industry standard for mid-tier equipment and protects against compressor failure, heat exchanger defects, and parts replacement. Registration is typically fast, often completed at point-of-sale or through Goodman's website. Keep your proof of purchase and registration documents, as manufacturers enforce activation deadlines.
Specifications
| SKU | LS38783850 |
| Brand/Manufacturer | Online Supply |
| Cooling BTU | 35,000 |
| Heating BTU | 80,000 |
| Refrigerant | R410A |
| Electrical | 115 V. 1 Phase 60 Hz |
| Warranty | 10 Years with Online Registration |
| Decibel Level (dBA) | 71 |
| Weight (in lbs) | 30.000000 |
| Feature | Spec |
| Product Features | Two Stage Condenser |
| Energy Star | Yes |
| SEER1 (Efficiency) | 18 |
| Condenser Stages | Two Stage |
| Compressor Type | Scroll |
| Liquid Valve Size | 3/8" |
| Suction Valve Size | 3/4" |
| Max Breaker Size | 35 amps |
| Min. Breaker Size | 21.3 amps |
| Tonnage | 3.5 Ton |
| Valve Type | Sweat |
| Height | 34.5" |
| Width | 21" |
| Depth | 28.75" |
| Resources | Goodman Brochure Goodman Installations Instructions 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 |
| Liquid Line | 3/8" |
| Suction Line | 7/8" |
| Style | A-Coil |
| AHRI Certificate Number | 7424266 |
| Airflow Direction | Upflow/Horizontal |
| Exhaust Flue Requirement | Plastic / PVC |
| Furnace Efficiency / AFUE | 97% |
| Blower Motor | Variable Speed - ECM |
| Maximum CFM | 1600 |
| Burner Stages | Modulating |
| Fuel Type | Propane, Natural Gas |
| Suction Line Insulation Thickness | 3/4" |
| Length | 50 feet |
Frequently Asked Questions
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