Review
Goodman's 5-ton upflow system delivers solid efficiency credentials at an entry-level price that has attracted both contractors and DIY-minded homeowners. With 16 SEER cooling, 97% AFUE heating, and Energy Star qualification, this unit hits the efficiency baseline that matters most to budget-conscious buyers. The SKU LS381183850 replaces the older GSX16S481 model, bringing variable-speed motor technology and modulating burner stages to a system category traditionally dominated by fixed-capacity equipment.
The cooling side produces 45,500 BTU using an R410A or R22 refrigerant scroll compressor operating at single-stage capacity. Heating delivers 80,000 BTU through a modulating gas burner, allowing the furnace to adjust output rather than cycling on and off. The variable-speed ECM blower moves up to 1,600 CFM, ramping speed based on actual demand. This combination means lower energy consumption than fixed-speed models during partial-load operation, translating to measurable savings on electricity and gas bills.
Pros & Cons
Pros
- 16 SEER rating exceeds the title spec claim and qualifies for Energy Star certification
- 97% AFUE furnace efficiency using modulating burner stages minimizes fuel waste
- Variable speed ECM blower motor adjusts to actual load, improving comfort and reducing runtime costs
- Scroll compressor design is proven reliable with fewer moving parts than reciprocating models
- PVC exhaust flue compatibility simplifies venting on retrofit installations
Cons
- Single-stage condenser means compressor runs at full capacity or off, less efficient than two-stage in mild weather
- 73 dB noise level is moderately loud for residential settings, comparable to older window units
- No dual-fuel or heat pump option limits performance in heating-dominant climates
Who Should Buy
Best For
Homeowners in moderate climates replacing 10+ year old split systems who prioritize straightforward installation and reliable efficiency without complex controls. Contractors needing a dependable, affordable retrofit solution for customers on tight budgets.
Consider Alternatives If
Anyone in heating-dominated regions, customers seeking the quietest operation, or those needing future flexibility with inverter or two-stage technology.
Installation
This upflow A-coil design fits standard 30 by 21 by 21 inch equipment closets and weighs 48 pounds for manageable handling. Electrically, it runs on standard 115V single-phase power with breaker sizing between 23.9 and 40 amps, requiring no special panel upgrades. PVC exhaust venting simplifies retrofit work versus older models needing metal flue pipes. Suction and liquid lines use industry-standard 1 1/8 inch and 3/8 inch fittings with 50 feet of pre-insulated suction line included.
Warranty & Reliability
Online Supply backs the unit with a 10-year parts warranty upon registration, covering compressor and most components but excluding consumables. This mid-tier coverage is typical for equipment at this price and protects against early manufacturing defects. Evaporator coil carries separate Goodman warranty. Registration is straightforward online and worth the small effort to activate full coverage.
Specifications
| SKU | LS381183850 |
| Brand/Manufacturer | Online Supply |
| Cooling BTU | 45,500 |
| Heating BTU | 80,000 |
| Refrigerant | R410A or R22 |
| Electrical | 115 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 | 30" |
| Width | 21" |
| 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. |
| AHRI Certificate Number | 7424266 |
| Airflow Direction | Upflow/Horizontal |
| Exhaust Flue Requirement | Plastic / PVC |
| Furnace Efficiency / AFUE | 97% |
| Blower Motor | Variable Speed - ECM |
| Maximum CFM | 1600 |
| Configuration | Upflow / Downflow |
| Burner Stages | Modulating |
| Fuel Type | Propane, Natural Gas |
| Liquid Line | 3/8" |
| Suction Line | 1 1/8" |
| Style | A-Coil |
| Suction Line Insulation Thickness | 1/2" |
| Length | 50 feet |
Frequently Asked Questions
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