Review
The Goodman 4 Ton 18 SEER two-stage heat pump occupies the practical middle ground of residential HVAC equipment. At 4,596 dollars, it undercuts premium brands while delivering solid efficiency credentials. The two-stage condenser design sets it apart from entry-level single-stage units, enabling variable capacity operation that improves comfort and reduces energy waste during partial-load conditions common in spring and fall.
Performance specs reveal a well-balanced design. The unit delivers 47,000 BTU for both cooling and heating, adequate for most four-ton applications. The 18 SEER rating demonstrates efficiency commitment, though note this is SEER1, not the newer SEER2 standard. The scroll compressor and sweat-connection refrigerant lines simplify installation for experienced technicians. Operating at 208/230V single-phase with a 29.3 to 50-amp breaker range, it integrates into typical residential electrical setups without expensive upgrades.
Pros & Cons
Pros
- 18 SEER rating qualifies for Energy Star certification and many utility rebates, reducing net installation cost
- Two-stage condenser allows lower-capacity operation during mild weather, improving efficiency and comfort consistency
- 47,000 BTU cooling and heating capacity handles standard residential loads in most climates effectively
- Scroll compressor design is field-proven for durability with fewer moving parts than alternatives
- 10-year warranty with online registration provides solid long-term protection for the investment
Cons
- 73 dBA noise level is moderately loud, potentially noticeable during compressor operation in quiet neighborhoods
- R410A refrigerant standard, not the newer low-GWP options available from premium manufacturers
- Two-stage design means higher initial cost than single-stage alternatives, though efficiency gains justify it
Who Should Buy
Best For
Contractors and homeowners in moderate climates replacing older AC systems or upgrading to heat pump heating want reliable performance without premium pricing. This unit fits well for residential retrofits where energy efficiency rebates offset the higher upfront cost versus single-stage competitors.
Consider Alternatives If
Buyers in extreme climates (very cold regions requiring heavy supplemental heat) or those prioritizing whisper-quiet operation should explore other options, as noise levels and heating-only capacity may not meet their specific needs.
Installation
Installation requires standard HVAC practices. The 3/8-inch liquid and 1 1/8-inch suction valve sizes align with common line sets. Sweat connections demand competent brazing or experienced technicians to avoid leaks. The unit measures 35.5 by 35.5 by 38.25 inches and weighs 330 pounds, requiring proper equipment pad preparation and vibration isolation to minimize the 73 dBA operational noise.
Warranty & Reliability
Goodman provides 10-year parts coverage upon online registration, standard in this product tier. This warranty protects against compressor failure, refrigerant leaks, and component defects. Online registration is straightforward and should be completed immediately after installation. Homeowners should retain documentation for claim purposes.
Specifications
| SKU | DSZC180481 |
| Brand/Manufacturer | Goodman |
| Cooling BTU | 47,000 |
| Heating BTU | 47,000 |
| Refrigerant | R410A |
| Electrical | 208 / 230 V. 1 Phase 60 Hz |
| Warranty | 10 Years with Online Registration |
| Decibel Level (dBA) | 73 |
| Weight (in lbs) | 330.000000 |
| Feature | Spec |
| Product Features | Rebate Available, Two Stage Condenser |
| Energy Star | Yes |
| SEER1 (Efficiency) | 18 |
| Condenser Stages | Two Stage |
| Compressor Type | Scroll |
| Liquid Valve Size | 3/8" |
| Suction Valve Size | 1 1/8" |
| Max Breaker Size | 50 amps |
| Min. Breaker Size | 29.3 amps |
| Tonnage | 4 Ton |
| Valve Type | Sweat |
| Height | 38.25" |
| Width | 35.5" |
| Depth | 35.5" |
| Resources | Goodman Customer Brochure Goodman Installation Instructions Goodman Parts Manual Goodman Specifications Goodman Technical Information Goodman Technical Installation Goodman Technical Publication 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. |
Frequently Asked Questions
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