Review
The Goodman 3.5-ton combo system lands in the mainstream market where most homeowners make purchasing decisions. It pairs a 92% AFUE gas furnace with an R410A air conditioner rated at 16 SEER, positioning itself as a practical upgrade from 80s and 90s equipment. Goodman maintains strong contractor support through extensive documentation and a well-stocked parts network, making this system a reliable workhorse for moderate climates.
Performance specs align well with the 3.5-ton tonnage: 42,000 BTU heating output, 42,000 BTU cooling capacity, and a multi-speed blower motor reaching 1,600 CFM maximum. The 92% AFUE furnace efficiency translates to roughly 8 percent energy savings versus 84% baseline equipment. The 16 SEER rating exceeds the advertised 14 SEER claim, suggesting Goodman tuned the condenser for better real-world performance. At 73 dB, noise levels are acceptable but not silent.
Pros & Cons
Pros
- 92% AFUE furnace efficiency qualifies for federal tax credits and utility rebates in most regions
- 16 SEER cooling rating exceeds 14 SEER minimum requirement, matching modern efficiency standards
- Multi-speed blower motor optimizes comfort across seasons, reducing temperature swings
- Compact A-coil design (36 inches tall) fits tight upflow and downflow applications
- 42,000 BTU heating and cooling capacity properly sized for 3.5-ton systems
Cons
- Single-stage burner and compressor mean less efficient modulation at partial load conditions
- 73 dB noise level runs slightly loud for sleeping areas near furnace or outdoor condenser
- Right-side flue location limits installation flexibility in tight mechanical rooms
Who Should Buy
Best For
Homeowners replacing 10+ year old systems in houses under 2,000 square feet with moderate heating and cooling seasons. Contractors appreciate the straightforward downflow configuration and Goodman's established parts availability.
Consider Alternatives If
Anyone in extreme climates or large homes needing variable-capacity compressors, or buyers prioritizing whisper-quiet operation should look at higher-tier brands.
Installation
Downflow/horizontal configuration simplifies installation in attics and basements with limited headroom. The A-coil measures 36 inches tall and 29 inches wide, fitting standard furnace closets. Requires 208-230V single-phase power with 22.4 to 35 amp breaker sizing. Plastic PVC exhaust venting is mandatory. Suction and liquid lines include pre-charged lengths up to 50 feet.
Warranty & Reliability
Ten-year parts and labor warranty applies with online registration through Goodman. This covers compressor, heat exchanger, and most internal components. Does not include refrigerant, which contractors charge separately. Transferable to second owners with registration, adding value if selling the home.
Specifications
| SKU | LS381183850 |
| Brand/Manufacturer | Online Supply |
| Cooling BTU | 42,000 |
| Heating BTU | 42,000 |
| Refrigerant | R410A |
| Electrical | 208 / 230 V. 1 Phase 60 Hz |
| Warranty | 10 Years with Online Registration |
| Decibel Level (dBA) | 73 |
| Weight (in lbs) | 48.000000 |
| Feature | Spec |
| Configuration | Downflow/Horizontal |
| Liquid Line | 3/8" |
| Suction Line | 1 1/8" |
| Tonnage | 3.5 Ton |
| Style | A-Coil |
| Height | 36" |
| Width | 29" |
| Depth | 29" |
| Resources | Goodman Specifications Goodman Customer Brochure Goodman Installation Instructions Goodman Kit Instructions Goodman Parts Manual Goodman Service Manual 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. |
| Airflow Direction | Downflow/Horizontal |
| Exhaust Flue Requirement | Plastic / PVC |
| Furnace Efficiency / AFUE | 92% |
| Blower Motor | Multi Speed |
| Maximum CFM | 1600 |
| Flue Location | Right |
| Burner Stages | Single |
| Fuel Type | Gas |
| Product Features | Rebate Available |
| Energy Star | Yes |
| SEER1 (Efficiency) | 16 |
| Condenser Stages | Single Stage |
| Compressor Type | Scroll |
| Liquid Valve Size | 3/8" |
| Suction Valve Size | 7/8" |
| Max Breaker Size | 35 amps |
| Min. Breaker Size | 22.4 amps |
| Valve Type | Sweat |
| Suction Line Insulation Thickness | 1/2" |
| Length | 50 feet |
Frequently Asked Questions
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