Review
The Goodman 4-ton 18 SEER horizontal split system coil sits comfortably in the mid-efficiency segment of today's market. It's the kind of unit that appeals to budget-conscious homeowners and volume installers who need dependable performance without cutting corners. At 47,000 BTU cooling capacity, it handles a typical 1,500 to 1,800 square foot home effectively. The horizontal A-coil configuration fits standard attic installations, and Goodman's manufacturing scale keeps pricing competitive against boutique brands.
The efficiency numbers tell the real story here. An 18 SEER1 rating qualifies for federal tax incentives in most jurisdictions and typically reduces cooling costs by 30 to 40 percent compared to pre-2010 units. The two-stage compressor cycles down during shoulder seasons, cutting unnecessary runtime. The variable-speed ECM blower motor pulls up to 2,000 CFM and automatically adjusts to system demand, which improves dehumidification and comfort. R410A refrigerant is now standard, and the unit operates cleanly across 208/230V single-phase power.
Pros & Cons
Pros
- 18 SEER rating meets current efficiency standards for tax credits and rebates in most states
- Two-stage scroll compressor reduces runtime and energy consumption during mild weather
- Variable-speed ECM blower motor enables quieter operation and better humidity control
- Sweat connections and standard 3/8 inch and 7/8 inch line sizes simplify installation
- 10-year warranty with online registration covers compressor and parts
Cons
- 72 dB noise level is slightly louder than premium coils, though acceptable for most installations
- No Wi-Fi or smart home integration for remote monitoring
- Horizontal configuration limits flexibility in tight attic or utility closet spaces
Who Should Buy
Best For
Homeowners in moderate climates looking to replace 10+ year old systems will see noticeable energy savings and better comfort. Contractors who install frequently in residential markets will appreciate the straightforward specifications and reliable performance.
Consider Alternatives If
Skip this unit if you need a vertical configuration, live in an extreme climate requiring single-stage efficiency, or prioritize smart home connectivity.
Installation
Installation is straightforward for experienced HVAC technicians. The 290-pound weight requires two people, and the 35.5 by 35.5 by 38.25 inch footprint demands standard attic or mechanical room space. The sweat connections and simple valve setup require basic brazing skills. Electrical requirements are modest, with a minimum 29.3 amp breaker and maximum 50 amp capacity. Most installations take 4 to 6 hours assuming ductwork is already in place.
Warranty & Reliability
Goodman backs this coil with a 10-year parts and compressor warranty when you register online. This is industry standard and covers manufacturing defects but excludes labor and refrigerant. The registration process is simple and takes five minutes. Extended warranties are available from some retailers, though the base coverage is solid for a residential unit expected to last 15 to 20 years.
Specifications
| SKU | DSXC180481 |
| Brand/Manufacturer | Goodman |
| Cooling BTU | 47,000 |
| Refrigerant | R410A |
| Electrical | 208 / 230 V. 1 Phase 60 Hz |
| Warranty | 10 Years with Online Registration |
| Decibel Level (dBA) | 72 |
| Weight (in lbs) | 290.000000 |
| Feature | Spec |
| Blower Motor | Variable Speed - ECM |
| Maximum CFM | 2,000 |
| Electric Backup Heat Capabilities (Optional) | 3 Kilowatts, 5 Kilowatts, 6 Kilowatts, 8 Kilowatts, 10 Kilowatts, 15 Kilowatts, 20 Kilowatts |
| Max Breaker Size | 50 amps |
| Tonnage | 4 Ton |
| Height | 38.25" |
| Width | 35.5" |
| Depth | 35.5" |
| Resources | Goodman Specifications Goodman Installation Manual 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 | Horizontal |
| Liquid Line | 3/8" |
| Suction Line | 7/8" |
| Style | A-Coil |
| Energy Star | Yes |
| SEER1 (Efficiency) | 18 |
| Condenser Stages | Two Stage |
| Compressor Type | Scroll |
| Liquid Valve Size | 3/8" |
| Suction Valve Size | 7/8" |
| Min. Breaker Size | 29.3 amps |
| Valve Type | Sweat |
Frequently Asked Questions
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