Review
The Goodman 4 Ton gas furnace and air conditioner system (SKU LS381183850) represents a practical middle-ground solution for residential HVAC replacements. This downflow-configured package combines a 120,000 BTU furnace with a 48,000 BTU cooling capacity, delivering paired heating and cooling from a single, manageable unit. Goodman's reputation for straightforward engineering without unnecessary complexity appeals to contractors and homeowners alike who value dependability over smart-home features.
The furnace achieves 96% AFUE efficiency, meaning 96 cents of every heating dollar goes directly into your home. The air conditioner delivers 13 SEER cooling efficiency with a single-stage reciprocating compressor running on R410A or R22 refrigerant. Multi-speed blower motor pulls up to 2000 CFM, adapting airflow to heating and cooling demands. Electrical requirements are modest, needing only 115V single-phase power with 26.3 to 45 amp breaker capacity, keeping installation costs down.
Pros & Cons
Pros
- 96% AFUE furnace efficiency reduces heating costs significantly compared to 80-90% units
- 13 SEER condenser meets mid-range cooling efficiency standards for moderate climates
- 120,000 BTU heating capacity handles cold winters in most residential applications
- Multi-speed blower motor optimizes airflow and comfort across varying loads
- Flexible refrigerant compatibility (R410A or R22) supports retrofit installations
- PVC flue compatible with modern venting codes and plastic ducting systems
Cons
- Single-stage burner and compressor cycle on-off rather than modulate, reducing efficiency in mild weather
- 13 SEER is competent but not leading-edge, lacking ENERGY STAR certification
- 76 dB noise level runs louder than variable-speed competitors, noticeable during operation
Who Should Buy
Best For
Homeowners in moderate climates replacing 15-20 year old furnace-AC combos benefit most from this system. Contractors installing downflow configurations in basements or crawl spaces will appreciate the straightforward specifications and proven Goodman reliability.
Consider Alternatives If
Buyers in extreme climates needing peak efficiency or those wanting whisper-quiet operation should explore variable-capacity systems with higher SEER ratings and modulating burners.
Installation
Installation complexity is straightforward for experienced HVAC technicians. The unit requires 3/8-inch liquid line and 1 1/8-inch suction line connections with sweat-type valves, standard for residential work. Downflow configuration suits basement or attic placement. PVC plastic flue venting with right-side flue location works with modern code-compliant systems. Dimensions of 30 inches tall, 24.5 inches wide, and 21 inches deep fit standard equipment spaces.
Warranty & Reliability
Goodman provides a 10-year parts warranty when you register online, covering manufacturing defects on major components. This warranty aligns with industry standards for mid-tier equipment and protects against compressor and heat exchanger failures. Registration is simple and strongly recommended to activate full coverage.
Specifications
| SKU | LS381183850 |
| Brand/Manufacturer | Online Supply |
| Cooling BTU | 48,000 |
| Heating BTU | 120,000 |
| Refrigerant | R410A or R22 |
| Electrical | 115 V. 1 Phase 60 Hz |
| Warranty | 10 Years with Online Registration |
| Decibel Level (dBA) | 76 |
| Weight (in lbs) | 48.000000 |
| Feature | Spec |
| Replaces | GSX130483, GSX130484, GSX130485 |
| Energy Star | No |
| SEER1 (Efficiency) | 13 |
| Condenser Stages | Single Stage |
| Compressor Type | Reciprocating |
| Liquid Line | 3/8" |
| Suction Line | 1 1/8" |
| Liquid Valve Size | 3/8" |
| Max Breaker Size | 45 amps |
| Min. Breaker Size | 26.3 amps |
| Tonnage | 5 Ton |
| Valve Type | Sweat |
| Height | 30" |
| Width | 24.5" |
| Depth | 21" |
| Resources | CAPF Installation Manual CAPF Specifications Sheet Goodman Evaporator Coil 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 | 96% |
| Blower Motor | Multi Speed |
| Maximum CFM | 2000 |
| Configuration | Upflow / Downflow |
| Flue Location | Right |
| Burner Stages | Single |
| Fuel Type | Gas |
| Style | A-Coil |
| Suction Line Insulation Thickness | 1/2" |
| Length | 50 feet |
Frequently Asked Questions
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