Review
The Goodman 3.5 Ton 16 SEER split system lands squarely in the middle of the residential AC market, offering contractors and homeowners a straightforward, dependable cooling solution without premium pricing. With 42,000 BTU cooling capacity and Energy Star certification, it handles moderate residential cooling demands competently. This SKU represents Goodman's commitment to accessible performance, backed by the manufacturer's established reputation for parts availability and contractor support across North America.
Performance metrics show a unit designed for real-world efficiency without cutting corners. The 16 SEER1 rating delivers solid energy performance, translating to meaningful utility savings for typical homeowners. Its variable-speed ECM blower motor maxes out at 1,840 CFM and intelligently modulates to match cooling demand, reducing runtime and energy waste. The scroll compressor operates at 73 dB, which is moderately loud but typical for single-stage commercial-grade equipment. Electrical requirements are straightforward: 208/240V single-phase with 57-60 amp circuit breakers.
Pros & Cons
Pros
- 16 SEER rating meets modern efficiency standards with Energy Star certification
- 42,000 BTU cooling capacity handles 3.5-ton residential loads effectively
- Variable-speed ECM blower motor reduces energy consumption and improves comfort
- Scroll compressor design minimizes vibration and delivers consistent performance
- 10-year warranty with online registration provides solid long-term protection
Cons
- 73 dB noise level is louder than premium competitors, noticeable during operation
- Single-stage compressor lacks modulation efficiency of variable-capacity units
- R410A refrigerant phaseout means future service and replacement costs may rise
Who Should Buy
Best For
Homeowners in moderate climates needing dependable cooling at reasonable cost, and HVAC contractors who value Goodman's parts availability and straightforward installation. This unit works well for new builds and replacements where budget matters without sacrificing baseline reliability.
Consider Alternatives If
Buyers in extremely hot climates requiring maximum efficiency, or those prioritizing whisper-quiet operation should explore variable-capacity or higher-SEER alternatives.
Installation
Installation is contractor-friendly with standard 3/8-inch liquid and 7/8-inch suction lines, both pre-insulated at 3/4-inch thickness. The condenser unit measures 58 inches tall by 24.5 inches wide, fitting typical outdoor locations. Linesets ship up to 50 feet, adequate for most residential installations. Electrical setup requires two dedicated circuits with proper breaker sizing. No special tools or expertise beyond standard HVAC practices are needed.
Warranty & Reliability
Goodman backs this unit with a comprehensive 10-year warranty when you register online after installation. Coverage includes compressor and parts defects, though labor and refrigerant are typically excluded. This warranty period matches or exceeds many competitor offerings at this price point and reflects Goodman's confidence in the design. Online registration is quick and provides peace of mind.
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 | 4 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 | 1,840 |
| 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.