Review
The Goodman 3 Ton Downflow Combo System occupies the middle ground of residential HVAC, targeting homeowners and contractors who prioritize budget over cutting-edge efficiency. This unit bundles a gas furnace and air conditioner coil, replacing legacy Goodman models (GSX130362, GSX130363, GSX130365) that are likely nearing end-of-life. At 13 SEER and 96% AFUE, the system delivers respectable performance without premium pricing, making it a practical choice for straightforward residential applications.
Performance metrics tell a practical story. The air conditioner generates 36,000 BTU of cooling at 13 SEER efficiency, reasonable for non-variable-speed equipment. The furnace delivers 40,000 BTU heat input with 96% AFUE, meaning minimal fuel waste during winter months. However, the single-stage reciprocating compressor runs at full bore or shuts off, missing the efficiency sweet spot at partial loads. At 74 dBA, expect noticeable sound during peak cooling, louder than variable-speed competitors.
Pros & Cons
Pros
- 96% AFUE gas furnace exceeds Energy Star baseline, reducing heating costs significantly
- 13 SEER cooling efficiency is competent for a budget system, delivering 36,000 BTU output
- Downflow configuration suits basement or attic placement in 80% of homes
- Multi-speed blower motor adapts to varying load conditions for better comfort
- Compatible with R410A or R22 refrigerant, providing retrofit flexibility
Cons
- Single-stage compressor cycles on and off rather than modulating, reducing part-load efficiency and comfort
- 74 dBA noise level is notably loud during AC operation, especially at full capacity
- Not Energy Star certified despite solid efficiency numbers, potentially affecting some rebate eligibility
- 10-year warranty requires online registration, which some users find inconvenient
Who Should Buy
Best For
Homeowners replacing aged Goodman GSX130 series condensers on a tight budget, particularly in moderate climates where single-stage operation is acceptable. Contractors installing systems in basements or attics where downflow configuration matches existing ductwork layouts will appreciate the straightforward installation process.
Consider Alternatives If
Buyers in extreme climates, noise-sensitive neighborhoods, or those seeking modulating compressors should explore variable-speed alternatives, even if they cost more upfront.
Installation
This downflow unit fits standard basement or attic installations with horizontal ductwork. The multi-speed blower requires 115V single-phase power, needing a 19.1 to 30-amp breaker. Line set requirements call for 3/8-inch liquid and 7/8-inch suction lines, with 3/8-inch insulation included on 30 feet of line. PVC exhaust flue meets modern venting codes. Installation difficulty remains moderate, suitable for experienced HVAC technicians.
Warranty & Reliability
Goodman backs this system with a 10-year parts warranty following online registration. No hassle-free claims process is mentioned, so warranty activation requires documentation. The registration requirement discourages some buyers, though 10 years covers major component failure risk. Extended warranties may be available through retailers, worth exploring before purchase.
Specifications
| SKU | LS38783830 |
| Brand/Manufacturer | Online Supply |
| Cooling BTU | 36,000 |
| Heating BTU | 40,000 |
| Refrigerant | R410A or R22 |
| Electrical | 115 V. 1 Phase 60 Hz |
| Warranty | 10 Years with Online Registration |
| Decibel Level (dBA) | 74 |
| Weight (in lbs) | 30.000000 |
| Feature | Spec |
| Replaces | GSX130362, GSX130363, GSX130365 |
| Energy Star | No |
| SEER1 (Efficiency) | 13 |
| Condenser Stages | Single Stage |
| Compressor Type | Reciprocating |
| Liquid Valve Size | 3/8" |
| Suction Valve Size | 3/4" |
| Max Breaker Size | 30 amps |
| Min. Breaker Size | 19.1 amps |
| Tonnage | 3 Ton |
| Valve Type | Sweat |
| Height | 26" |
| Width | 17.5" |
| 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. |
| Airflow Direction | Downflow/Horizontal |
| Exhaust Flue Requirement | Plastic / PVC |
| Furnace Efficiency / AFUE | 96% |
| Blower Motor | Multi Speed |
| Maximum CFM | 800 |
| Configuration | Upflow / Downflow |
| Burner Stages | Single |
| Fuel Type | Gas |
| Liquid Line | 3/8" |
| Suction Line | 7/8" |
| Style | A-Coil |
| Suction Line Insulation Thickness | 3/8" |
| Length | 30 feet |
Frequently Asked Questions
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