Review
The Goodman 3-ton gas furnace and air conditioner system represents a compelling value proposition in the mid-range HVAC market. At $89 before potential rebates, this unit delivers efficiency ratings that typically command premium pricing at other manufacturers. The system combines a 120,000 BTU gas furnace with 35,000 BTU cooling capacity in a single upflow A-coil configuration, making it suitable for mid-sized homes in mixed climates. Goodman's reputation for straightforward, reliable equipment without unnecessary complexity appeals to practical homeowners and experienced contractors alike.
Performance-wise, the 97% AFUE rating on the furnace means nearly all fuel converts to usable heat, a significant advantage over older 80% AFUE systems that still occupy many homes. The 18 SEER2 air conditioner uses R410A refrigerant with a two-stage scroll compressor and variable-speed ECM blower motor that adjusts between 0 and 2000 CFM. The modulating burner stages adapt flame intensity to heating demand rather than cycling on and off, reducing temperature swings and energy consumption. These specifications place this unit at the efficiency tier that justifies Energy Star certification and qualifies for utility rebates in many regions.
Pros & Cons
Pros
- 97% AFUE furnace efficiency means minimal wasted heat, translating to lower winter heating bills
- 18 SEER2 rating with two-stage compressor and scroll compressor technology reduces cooling costs
- Modulating burner stages optimize flame intensity based on demand, not just on/off operation
- Variable-speed ECM blower motor adjusts airflow from 0 to 2000 CFM for precise climate control
- Energy Star certified and qualifies for potential rebates, offsetting initial cost
- PVC/plastic flue compatibility simplifies venting requirements on retrofit installations
- 10-year comprehensive warranty with online registration provides solid long-term protection
Cons
- Listed tonnage discrepancy, 3-ton unit spec but shows 5-ton capacity creating potential confusion on true capacity
- 71 dB noise level is moderate, not ideal for homeowners sensitive to furnace operation sound
- Sweat valve connections require soldering skills or professional HVAC installer involvement
- A-coil design requires upflow/horizontal configuration only, limiting retrofit flexibility in some homes
Who Should Buy
Best For
Homeowners replacing 10+ year old furnace and AC systems who prioritize operating cost savings over premium features. This unit makes sense for those in moderate climates where both heating and cooling matter, and who can arrange professional installation to ensure proper refrigerant charge and ductwork matching.
Consider Alternatives If
Contractors needing variable-tonnage solutions or homeowners with strict noise requirements under 68 dB should look at alternative manufacturers or variable-capacity models.
Installation
Installation requires proper HVAC certification due to refrigerant handling and gas line connections. The 115V single-phase electrical requirement needs a dedicated circuit with 21.3 to 35-amp breaker capacity. Sweat valve connections demand soldering capability or professional labor. The unit weighs 30 pounds and measures 34.5 inches high, 24.5 inches wide, and 28.75 inches deep, fitting most standard utility closets or basement installations. PVC plastic flue venting simplifies exhaust requirements compared to metal ductwork.
Warranty & Reliability
Goodman backs this system with a 10-year comprehensive parts warranty upon online registration. This extended coverage protects against compressor failure, component defects, and parts replacement costs. Registration is straightforward and unlocks full warranty benefits. However, labor costs and installation issues fall outside warranty scope. Ten years of protection aligns with the typical lifespan of HVAC equipment, providing reasonable peace of mind for the purchase price.
Specifications
| SKU | LS38783850 |
| Brand/Manufacturer | Online Supply |
| Cooling BTU | 35,000 |
| Heating BTU | 120,000 |
| 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 | Rebate Available |
| 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 | 5 Ton |
| Valve Type | Sweat |
| Height | 34.5" |
| Width | 24.5" |
| 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 | 7424268 |
| Airflow Direction | Upflow/Horizontal |
| Exhaust Flue Requirement | Plastic / PVC |
| Furnace Efficiency / AFUE | 97% |
| Blower Motor | Variable Speed - ECM |
| Maximum CFM | 2000 |
| Flue Location | Right |
| Burner Stages | Modulating |
| Fuel Type | Propane, Natural Gas |
| Suction Line Insulation Thickness | 3/4" |
| Length | 50 feet |
Frequently Asked Questions
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