Review
The Goodman 3.5 Ton 16 SEER split system positions itself as a practical middle-ground option in the residential HVAC market. This unit targets homeowners and contractors who prioritize reasonable efficiency without stretching budgets for premium equipment. With 42,000 cooling BTU output and Energy Star certification, it delivers meaningful performance for homes in moderate climates. The scroll compressor design and variable-speed blower motor signal Goodman's commitment to balancing capability with operational reliability.
Performance numbers tell a straightforward story here. The 16 SEER rating aligns with modern efficiency standards, translating to real energy savings compared to 13-14 SEER units common in older homes. The variable-speed ECM blower reaching 1,775 CFM allows the system to adjust airflow intelligently rather than running full-blast constantly. Cooling capacity sits at 42,000 BTU, appropriate for 3,500 square feet in moderate climates. The 73 dBA noise output is neither exceptionally quiet nor objectionably loud, putting it in mainstream territory for standard residential condenser units.
Pros & Cons
Pros
- 16 SEER rating qualifies for Energy Star certification, reducing annual cooling costs by 15-20% versus older units
- Variable-speed ECM blower motor with 1,775 CFM maximum output enables precise temperature control and quieter operation
- Scroll compressor design runs smoother than reciprocating models, reducing vibration and extending service life
- Single-stage operation keeps electrical demands manageable at 57-60 amp circuit requirements
- Optional electric backup heat up to 20 kilowatts adds heating flexibility for mild climates
Cons
- 73 dBA noise level is moderately loud, comparable to window units, which may bother noise-sensitive homeowners
- Single-stage compressor cannot modulate capacity, so efficiency drops during partial-load conditions
- 10-year warranty requires online registration, creating administrative overhead before coverage activates
Who Should Buy
Best For
Homeowners in moderate climates seeking affordable, efficient cooling for homes between 2,500 and 3,500 square feet will get strong performance and genuine utility savings. Contractors building spec homes or installing equipment for price-conscious clients will appreciate the solid SEER rating paired with straightforward installation requirements.
Consider Alternatives If
Anyone in hot climates needing maximum efficiency or variable-capacity cooling should consider higher SEER units with two-stage compressors, as single-stage systems waste energy during partial-load operation.
Installation
Installation suits experienced HVAC technicians and qualified electricians. The unit requires 208, 230, or 240-volt single-phase power with careful attention to breaker sizing: 57-60 amps on Circuit 1 and 50 amps on Circuit 2. Refrigerant line sizing uses standard 3/8-inch liquid and 7/8-inch suction lines with 3/4-inch insulation, allowing up to 50 feet of lineset. Goodman's detailed installation manual and kit documentation streamline the process for professionals.
Warranty & Reliability
The 10-year warranty covers defects in materials and workmanship, provided you complete online registration within 30 days of purchase. This timeframe is standard but requires attention, as it's easy to miss. Parts coverage extends fully for a decade, which is competitive in the mid-range segment. Labor coverage details vary by dealer, so clarify those specifics before purchasing.
Specifications
| SKU | HKSC20DB |
| Brand/Manufacturer | Goodman |
| Cooling BTU | 42,000 |
| Heating BTU | 68,200 |
| Refrigerant | R410A |
| Electrical | 208 / 230 / 240 Volts / 1 Phase |
| Warranty | 10 Years with Online Registration |
| Decibel Level (dBA) | 73 |
| Weight (in lbs) | 9.000000 |
| 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 | Circuit 1: 60 amps / Circuit 2: 50 amps |
| Min. Breaker Size | Circuit 1: 57 amps / Circuit 2: 50 amps |
| Tonnage | 3.5 Ton |
| Height | 58" |
| Width | 24.5" |
| Depth | 21" |
| 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. |
| 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" |
| Fuel Type | Electric |
| Suction Line Insulation Thickness | 3/4" |
| Length | 50 feet |
| Electric Heat | 20 Kilowatts |
| Phase | Single Phase |
Frequently Asked Questions
Affiliate disclosure: IndustrialRank earns a commission on qualifying purchases at no extra cost to you. We only recommend products we have independently reviewed.