Review
Goodman has built its reputation on delivering solid mid-tier equipment at prices that don't require financing. This 4-ton horizontal configuration combines their proven scroll compressor technology with a 96% AFUE furnace, hitting the efficiency targets that appeal to both contractors and homeowners tired of utility bills. The package addresses a real market need, sitting above budget equipment but below premium variable-capacity systems. With an AHRI certificate on file and Energy Star certification, it's built for immediate deployment and rebate processing.
The cooling side produces 45,500 BTU at 16 SEER1 efficiency, translating to roughly 30% better performance than 13 SEER baseline units. On heating, the 120,000 BTU output at 96% AFUE means minimal fuel waste, a meaningful difference compared to 80% units. The variable-speed ECM blower adjusts between 0 and 2000 CFM, allowing the system to match actual load rather than running full blast constantly. This two-stage burner approach reduces cycling while the scroll compressor provides reliable single-stage cooling for consistent performance.
Pros & Cons
Pros
- 16 SEER1 efficiency rating qualifies for Energy Star and rebates, reducing long-term operating costs
- 96% AFUE furnace captures nearly all fuel energy, superior to standard 80-90% models
- Variable-speed ECM blower motor adjusts airflow from 0-2000 CFM, improving comfort and efficiency
- Two-stage burner allows soft-start heating, reducing utility spikes and extending component life
- Lifetime heat exchanger warranty plus 10 years parts coverage with registration provides solid protection
Cons
- Single-stage compressor cannot modulate cooling capacity, cycling on and off rather than ramping smoothly
- 73 dB noise level runs slightly louder than high-end variable-capacity competitors during full operation
- Specs show conflicting tonnage information, listing both 4 ton and 5 ton which may indicate data entry error requiring clarification
Who Should Buy
Best For
Contractors seeking reliable split systems for residential retrofit projects and homeowners in hot climates wanting immediate rebate eligibility and proven Goodman reliability. The efficient cooling and heating combination makes it ideal for all-season comfort without premium pricing.
Consider Alternatives If
Homeowners in mild climates who rarely need cooling, or those prioritizing whisper-quiet operation should explore variable-capacity systems that modulate compressor speed for smoother, quieter performance.
Installation
The horizontal A-coil configuration works with upflow or horizontal furnaces, common in modern homes. Electrical requirements are straightforward, 115V single-phase 60Hz with a breaker between 23.9 and 40 amps. Refrigerant lines use standard 3/8 inch liquid and 1 1/8 inch suction sizing with 1/2 inch insulation. PVC exhaust venting requirement is standard for condensing furnaces. Most licensed technicians complete installation in 4-6 hours.
Warranty & Reliability
The lifetime heat exchanger warranty covers the most expensive potential failure, an unusually strong commitment from Goodman. Ten years of parts coverage kicks in after registration, protecting compressors, blowers, and valves. Notably, labor coverage and refrigerant are not included, which is typical for this price tier but worth factoring into total ownership cost calculations.
Specifications
| SKU | LS381183850 |
| Brand/Manufacturer | Online Supply |
| Cooling BTU | 45,500 |
| Heating BTU | 120,000 |
| Refrigerant | R410A |
| Electrical | 115 V. 1 Phase 60 Hz |
| Warranty | Lifetime Heat Exchanger and 10 Years Parts 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 | 24.5" |
| Depth | 28.75" |
| Resources | Goodman Brochure Goodman Install 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 | 1 1/8" |
| Style | A-Coil |
| AHRI Certificate Number | 7368842 |
| Airflow Direction | Upflow/Horizontal |
| Exhaust Flue Requirement | Plastic / PVC |
| Product Features | Rebate Available |
| Furnace Efficiency / AFUE | 96% |
| Blower Motor | Variable Speed - ECM |
| 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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