Review
The Goodman 5-ton downflow system positions itself in the mid-to-premium segment of residential HVAC equipment. Online Supply offers this dual-fuel unit at competitive pricing, making high-efficiency heating and cooling accessible to contractors managing diverse customer budgets. Goodman's brand recognition stems from reliable performance across commercial and residential applications. This particular configuration targets homes needing simultaneous heating and cooling capacity with downflow ductwork architecture.
Performance metrics exceed baseline expectations. The 96% AFUE furnace converts nearly all natural gas or propane into usable heat, minimizing wasted energy up the exhaust flue. Cooling delivers 42,000 BTU at a 16 SEER1 rating, surpassing the advertised 15 SEER specification. The variable-speed ECM blower motor ramps between 0-2000 CFM, allowing soft-start operation that reduces initial energy spikes. Two burner stages prevent energy-wasting short cycles during mild weather.
Pros & Cons
Pros
- 96% AFUE furnace efficiency reduces heating costs significantly compared to 80-90% units
- 16 SEER1 cooling rating outperforms the advertised 15 SEER specification
- Variable-speed ECM blower motor adjusts output from 0-2000 CFM for comfort and efficiency
- Two-stage burner system minimizes short-cycling and cycling losses
- Energy Star certified with 10-year warranty covering parts when registered online
- Scroll compressor is proven durable across thousands of Goodman installations
Cons
- 73 dB noise level may be noticeable in quiet residential settings during operation
- Single-stage cooling compressor cannot modulate capacity for variable-load efficiency
- 5-ton capacity oversizes many homes and increases first costs unnecessarily
- Requires 40-amp maximum electrical service, limiting some older home installations
Who Should Buy
Best For
Contractors and homeowners upgrading 15-25 year old systems who want proven reliability with strong efficiency gains. This system makes sense for homes where 5-ton cooling capacity matches actual load calculations and dual-fuel flexibility is valuable.
Consider Alternatives If
Budget-conscious buyers seeking entry-level equipment should explore lower-tonnage options. Those in harsh climates may prefer two-stage cooling compressors for better part-load efficiency.
Installation
This downflow A-coil unit requires PVC or plastic exhaust venting, standard for modern installations. Electrical service demands a 23.5 to 40-amp circuit at 115V single-phase, manageable for most homes. The 3/8 inch liquid line and 1 1/8 inch suction line with 1/2 inch insulation thickness follow industry standard configurations. Pre-charged refrigerant lines simplify field connections for experienced technicians.
Warranty & Reliability
Online Supply backs this unit with a 10-year comprehensive parts warranty upon online registration. This coverage protects compressor, heat exchanger, and sealed components, typical for Goodman equipment. Registration is essential, as failures without proof of registration may face partial coverage limitations. Extended warranties are available through some distributors for additional cost.
Specifications
| SKU | LS381183850 |
| Brand/Manufacturer | Online Supply |
| Cooling BTU | 42,000 |
| Heating BTU | 100,000 |
| 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 |
| 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 | 23.5 amps |
| Tonnage | 5 Ton |
| Height | 34.5" |
| Width | 21" |
| 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 | 7368844 |
| 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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