Review
The Goodman 4-ton gas furnace and air conditioner system sits firmly in the middle market, targeting homeowners and contractors who prioritize reliability over cutting-edge efficiency. This upflow configuration accommodates typical attic and basement installations common across residential markets. Online Supply distributes the unit under SKU LS381183850, positioning it as a practical upgrade path for existing Goodman equipment owners or customers seeking a trusted, recognizable brand without premium pricing.
Performance specs reveal a mixed picture. The air conditioner delivers 16 SEER2 efficiency with 45,500 cooling BTU using a scroll compressor and R410A or R22 refrigerant options. However, the single-stage design means the compressor runs at full capacity constantly, cycling on and off rather than modulating to match demand. The furnace provides 100,000 BTU heating at 80% AFUE using a two-stage burner, which modulates better than the cooling side but still trails 95% AFUE units. The variable-speed blower motor with 2000 CFM maximum helps offset cycling losses.
Pros & Cons
Pros
- Variable speed blower motor adjusts to 2000 CFM maximum, improving comfort and reducing energy waste during partial load conditions
- Two-stage gas burner with 100,000 BTU heating output provides efficient heating in cold climates with modulating performance
- 16 SEER2 cooling efficiency earns Energy Star certification, translating to lower summer operating costs versus older equipment
- A-coil configuration in upflow orientation suits attic or basement installation in most residential layouts
- Scroll compressor is proven architecture with good reliability track record across Goodman's product lineup
Cons
- 80% AFUE furnace efficiency lags modern high-efficiency units reaching 95% AFUE, meaning higher heating fuel consumption
- Single-stage cooling compressor cannot modulate capacity, running at full power even during mild days and cycling on/off frequently
- Conflicting tonnage specs: product title claims 4 tons but specs list 5 tons and 45,500 cooling BTU, creating confusion for proper sizing
Who Should Buy
Best For
Contractors and homeowners replacing older Goodman systems or upgrading from units over 10-15 years old will find straightforward compatibility and familiar service pathways. This system fits homes in moderate climate zones where lower cooling loads don't demand premium multi-stage compressors.
Consider Alternatives If
Skip this unit if you need maximum energy efficiency or live in extreme climates where single-stage cooling or 80% AFUE causes frequent runtime and high bills.
Installation
Installation requires 120V single-phase 60Hz power, drawing 23.9 to 40 amps depending on runtime conditions. The upflow A-coil measures 34.5 inches tall, 21 inches wide, and 28.75 inches deep, fitting standard basement or attic mechanical closets. Suction line insulation thickness of half-inch protects refrigerant lines, while 3/8 inch liquid and 7/8 inch suction valve sizes connect to standard lineset configurations. Metal exhaust flue requirement means ductwork sizing and termination planning are necessary.
Warranty & Reliability
Goodman covers this unit with a 10-year parts and labor warranty upon online registration. This solid coverage matches mid-tier equipment standards and handles compressor, motor, and heat exchanger failures during normal operation. Registration requirement means homeowners must complete paperwork to activate full protection, so contractors should advise new owners of this step immediately after installation.
Specifications
| SKU | LS381183850 |
| Brand/Manufacturer | Online Supply |
| Cooling BTU | 45,500 |
| Heating BTU | 100,000 |
| Refrigerant | R410A or R22 |
| Electrical | 120 V. 1 Phase 60 Hz |
| Warranty | 10 Years with Online Registration |
| Decibel Level (dBA) | 73 |
| Weight (in lbs) | 48.000000 |
| Feature | Spec |
| Replaces | GSX16S481 |
| 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 | 40 amps |
| Min. Breaker Size | 23.9 amps |
| Tonnage | 5 Ton |
| Height | 34.5" |
| Width | 21" |
| Depth | 28.75" |
| Resources | Goodman Brochure Goodman Installation Instructions Goodman Parts Manual Goodman Service Manual 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 | 1 1/8" |
| Style | A-Coil |
| Airflow Direction | Upflow/Horizontal |
| Exhaust Flue Requirement | Metal |
| Furnace Efficiency / AFUE | 80% |
| Blower Motor | Variable Speed |
| Maximum CFM | 2000 |
| Burner Stages | Two |
| Fuel Type | Propane, Natural Gas |
| Suction Line Insulation Thickness | 1/2" |
| Length | 50 feet |
Frequently Asked Questions
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