Review
The Goodman 4-ton gas furnace and air conditioner system at $3253 occupies the sweet spot between budget equipment and premium brands. This horizontal-configuration unit combines 16 SEER cooling efficiency with 96% AFUE heating, addressing both seasonal comfort needs in one package. The system replaces the GSX16S481 and comes from Online Supply with solid contractor availability. At this price point, it represents genuine value for homeowners managing replacement budgets while refusing to sacrifice efficiency ratings that impact monthly utility bills.
Performance specs are straightforward and honest. The cooling side delivers 45,500 BTU capacity through a scroll compressor at single-stage operation, paired with a 73 dB noise profile that's acceptable but not whisper-quiet. Heating produces 120,000 BTU across two burner stages, allowing the system to modulate output efficiently from 30% to full capacity. The variable-speed ECM blower reaches 2000 CFM maximum while adjusting itself to demand, reducing run time and energy waste compared to constant-speed motors common in older units.
Pros & Cons
Pros
- 16 SEER2 cooling efficiency qualifies for ENERGY STAR certification, reducing summer utility costs significantly
- 96% AFUE heating efficiency captures nearly all fuel value, saving $200-400 annually versus older furnaces
- Two-stage burner and variable-speed ECM blower provide comfort and efficiency across all load conditions
- 120,000 BTU heating capacity handles cold climates while 45,500 BTU cooling manages moderate to warm regions
- 10-year warranty with online registration covers parts, protecting against compressor or heat exchanger failure
- Dual-fuel capability accepts natural gas or propane, useful for homes with flexible fuel sources
Cons
- Single-stage compressor lacks modulating capacity for ultra-fine temperature control that variable-speed units offer
- 73 dB noise level is slightly higher than high-end competitors, noticeable during cooling operation
- Horizontal/downflow configuration limits placement options, requiring basement or utility closet positioning
- Requires plastic/PVC exhaust flue, incompatible with older masonry chimneys without retrofit expense
Who Should Buy
Best For
Homeowners replacing 10-15 year old systems who prioritize energy savings and want solid warranties without paying premium prices. Contractors installing mid-range replacements in moderate climates where both heating and cooling are equally important.
Consider Alternatives If
Buyers seeking ultra-quiet operation or living in extreme climates where higher tonnage or modulating compressors provide better efficiency.
Installation
Installation requires standard 115V single-phase 60Hz service, with breaker sizing between 23.9 and 40 amps depending on local codes. The unit weighs 48 pounds and fits tight spaces at 34.5 inches high by 24.5 inches wide by 28.75 inches deep. Horizontal positioning demands drop-down or side-mounted placement in basements or utility areas. Refrigerant lines use 3/8-inch liquid and 1 1/8-inch suction ports with 1/2-inch insulation thickness, requiring careful routing and securing.
Warranty & Reliability
Online Supply backs this unit with a 10-year parts warranty upon online registration, covering compressor, heat exchanger, and coil defects. This is competitive at the mid-range price point. However, labor is not included, so contractor service calls after year one will cost extra. The warranty provides genuine peace of mind against catastrophic failure but doesn't cover routine maintenance or refrigerant recharging.
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 | 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 | 24.5" |
| Depth | 28.75" |
| Resources | Goodman Brochure Goodman Installation 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 | Downflow/Horizontal |
| Liquid Line | 3/8" |
| Suction Line | 1 1/8" |
| Style | A-Coil |
| AHRI Certificate Number | 7368845 |
| Airflow Direction | Downflow/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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