Review
The Goodman 3-ton two-stage split system sits comfortably in the mid-market segment, offering solid engineering without the premium pricing of tier-one brands. With an 18 SEER rating and Energy Star certification, this unit delivers measurable efficiency improvements over older equipment. The variable speed ECM blower and two-stage compressor represent genuine performance features rather than marketing fluff, making this a practical choice for contractors and homeowners prioritizing reliability and modest efficiency gains.
Performance specs tell a straightforward story: 35,000 BTU cooling capacity handles 3-ton applications, while the variable speed motor delivers maximum 1,775 CFM for load matching. The two-stage compressor operates at partial capacity during milder days, reducing energy waste from short cycling. At 71 dBA, noise levels remain acceptable for most residential installations. The scroll compressor and R410A refrigerant pairing represents standard contemporary design with proven track records. Optional electric backup heat from 5kW to 20kW accommodates heat pump applications across different climate zones.
Pros & Cons
Pros
- 18 SEER rating qualifies for Energy Star with meaningful utility savings compared to baseline models
- Variable speed ECM blower motor adjusts CFM from low idle to 1,775 CFM for comfort and efficiency
- Two-stage compressor allows 60 percent capacity operation during mild weather to reduce short cycling
- Scroll compressor design is proven reliable with fewer moving parts than reciprocating alternatives
- Optional electric backup heat ranges from 5kW to 20kW for heat pump or hybrid system flexibility
Cons
- 71 dBA noise level is moderately loud for quieter residential settings, especially at high stage operation
- Standard 10-year warranty requires online registration, adding an extra step many homeowners skip
- R410A refrigerant phaseout timeline means eventual servicing may become more expensive as supplies tighten
Who Should Buy
Best For
Contractors installing replacement systems for homes with existing 208-240V single-phase service will appreciate the flexible voltage options and straightforward two-stage design. Homeowners upgrading from 13-14 SEER units who value efficiency gains without paying for premium ultra-high SEER models find strong value here.
Consider Alternatives If
Buyers in very hot climates needing maximum cooling capacity should consider higher SEER models, and those with noise sensitivity should audition the 71 dBA output before committing.
Installation
Installation requires 208-240V single-phase service with dedicated circuits rated 57-60 amps and 50 amps respectively. Linesets connect via 3/8-inch liquid and 7/8-inch suction sweat valves, both standard sizing for most existing copper runs. The 35.5-inch square footprint and 38.25-inch height demand proper outdoor pad clearance. Goodman's comprehensive installation manual and kit documentation support standard split system deployment, making this moderately straightforward for certified HVAC installers.
Warranty & Reliability
Goodman backs this unit with 10 years parts coverage upon online registration, a solid mid-tier protection level. Registration requires minimal effort but must be completed within warranty period to activate coverage. Parts coverage protects against manufacturing defects but excludes normal wear, refrigerant loss, and installation errors. For contractors, the registration requirement offers slight administrative overhead but delivers meaningful customer confidence during the critical first decade.
Specifications
| SKU | HKSC20DB |
| Brand/Manufacturer | Goodman |
| Cooling BTU | 35,000 |
| Heating BTU | 68,200 |
| Refrigerant | R410A |
| Electrical | 208 / 230 / 240 Volts / 1 Phase |
| Warranty | 10 Years with Online Registration |
| Decibel Level (dBA) | 71 |
| Weight (in lbs) | 9.000000 |
| Feature | Spec |
| Blower Motor | Variable Speed - ECM |
| Maximum CFM | 1,775 |
| Electric Backup Heat Capabilities (Optional) | 5 Kilowatts, 8 Kilowatts, 10 Kilowatts, 15 Kilowatts, 20 Kilowatts |
| Filter Size | 23" x 20" |
| Liquid Line | 3/8" |
| Suction Line | 7/8" |
| Max Breaker Size | Circuit 1: 60 amps / Circuit 2: 50 amps |
| Tonnage | 3 Ton |
| Fuel Type | Electric |
| Height | 38.25" |
| Width | 35.5" |
| Depth | 35.5" |
| Resources | Goodman Installation Manual Goodman Specifications Goodman Parts Manual Goodman Service Manual Goodman Kit 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. |
| 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 | Circuit 1: 57 amps / Circuit 2: 50 amps |
| Valve Type | Sweat |
| Electric Heat | 20 Kilowatts |
| Phase | Single Phase |
Frequently Asked Questions
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