Review
The Goodman 4-ton gas furnace and air conditioner system represents a solid mid-market choice for residential HVAC replacement and new construction projects. This combination unit pairs a 100,000 BTU furnace with a 45,500 BTU air conditioner, offering year-round comfort in one integrated package. Manufactured by Online Supply under SKU LS381183850 and certified under AHRI number 7424267, the system targets contractors and homeowners seeking efficiency improvements without premium pricing.
Performance data reveals strong heating credentials, starting with the exceptional 97% AFUE rating that converts nearly all fuel to usable heat. The modulating burner continuously adjusts flame size based on demand, reducing the on-off cycling that wastes energy in standard equipment. Cooling achieves 16 SEER efficiency with a scroll compressor and R410A refrigerant. The variable-speed ECM blower motor pulls 2000 CFM maximum while consuming less power than fixed-speed alternatives, balancing comfort and operating costs effectively.
Pros & Cons
Pros
- 97% AFUE furnace efficiency far exceeds standard 80-90% models, reducing monthly heating costs
- Modulating burner adjusts output continuously rather than cycling on/off, improving comfort and efficiency
- Variable-speed ECM blower motor optimizes airflow at 2000 CFM max and reduces electricity consumption
- 16 SEER air conditioner handles 45,500 BTU cooling with ENERGY STAR certification
- Compact 21x21x30 inch footprint fits tight mechanical rooms without major modifications
- PVC/plastic exhaust flue compatibility eliminates expensive venting upgrades on many installations
Cons
- 5-ton tonnage mismatch with stated 4-ton capacity creates specification confusion for sizing accuracy
- Single-stage condenser on cooling side limits efficiency gains compared to dual-stage competitors
- 73 dB noise level runs louder than premium variable-capacity systems during operation
- No price listed makes cost comparison and value assessment impossible for potential buyers
Who Should Buy
Best For
Contractors upgrading customer systems in cold-climate zones and budget-conscious homeowners replacing 10-20 year old furnaces. The 97% AFUE makes strong financial sense where heating demand is high and natural gas rates are moderate to steep.
Consider Alternatives If
Anyone in mild climates where heating usage is minimal, or buyers needing two-stage cooling efficiency and whisper-quiet operation should explore variable-capacity alternatives.
Installation
This upflow/horizontal configuration requires standard right-side flue positioning with PVC or plastic venting, eliminating costly metal chimney conversions. The 21x21x30 inch dimensions fit most closets and basements, reducing structural modifications. Electrical needs are straightforward, 208-230V single-phase 60Hz with breaker range between 23.9 and 40 amps. Refrigerant lines specify 3/8 inch liquid and 1-1/8 inch suction sizing with 1/2 inch insulation thickness.
Warranty & Reliability
Goodman provides a solid 10-year parts warranty when you register online after installation. This coverage period aligns with industry standards for mid-tier systems and protects against compressor failure, blower motor defects, and heat exchanger issues. Evaporator coil coverage extends separately per Goodman documentation, though specific duration requires checking the included warranty documents.
Specifications
| SKU | LS381183850 |
| Brand/Manufacturer | Online Supply |
| Cooling BTU | 45,500 |
| Heating BTU | 100,000 |
| Refrigerant | R410A |
| Electrical | 208 / 230 V. 1 Phase 60 Hz |
| Warranty | 10 Years with Online Registration |
| Decibel Level (dBA) | 73 |
| Weight (in lbs) | 48.000000 |
| Feature | Spec |
| AHRI Certificate Number | 7424267 |
| Airflow Direction | Upflow/Horizontal |
| Exhaust Flue Requirement | Plastic / PVC |
| Product Features | Rebate Available |
| Furnace Efficiency / AFUE | 97% |
| Blower Motor | Variable Speed - ECM |
| Maximum CFM | 2000 |
| Configuration | Upflow / Downflow |
| Flue Location | Right |
| Energy Star | Yes |
| Burner Stages | Modulating |
| Fuel Type | Propane, Natural Gas |
| Height | 30" |
| Width | 21" |
| Depth | 21" |
| Resources | CAPT Installation Manual CAPT 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. |
| Replaces | GSX16S481 |
| 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 |
| 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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