Review
The Goodman 3.5-ton variable-speed heat pump represents a practical middle ground in the HVAC market, offering solid efficiency without premium pricing. Manufactured by Online Supply, this horizontal A-coil configuration targets homeowners and contractors balancing performance, cost, and installation simplicity. Its 16 SEER1 rating and variable-speed ECM blower motor position it as an energy-conscious choice for moderate climates where both heating and cooling are essential year-round.
Performance-wise, this system delivers 42,000 BTU of both cooling and heating capacity with a maximum airflow of 2,000 CFM. The variable-speed ECM blower operates at 73 dB during peak demand, adjusting output to match actual requirements rather than running full blast constantly. Electrical requirements are modest, drawing between 22.4 and 35 amps on 208/230V single-phase power, making it compatible with most residential panels without expensive upgrades. The compact 36x29x29-inch footprint suits tight attic spaces where traditional coils won't fit.
Pros & Cons
Pros
- 16 SEER1 rating delivers strong energy efficiency, lowering utility bills by 20-30 percent compared to older 13 SEER equipment
- Variable-speed ECM blower motor runs quietly at 73 dB and adjusts output to match heating/cooling demand, reducing noise and energy waste
- Flexible electric backup heat options from 3 kW to 20 kW accommodate various installation scenarios and climate needs
- Compact horizontal A-coil design fits tight attic spaces, making retrofit installations practical where space is limited
- Scroll compressor technology provides durability and quiet operation with fewer moving parts than rotary designs
- ENERGY STAR certified with rebate eligibility, offsetting initial purchase costs for budget-conscious buyers
Cons
- Single-stage condenser cannot modulate capacity, so it cycles on and off rather than continuously adjusting like two-stage units
- 73 dB noise level at full capacity exceeds what some homeowners find acceptable, especially during evening cooling cycles
- R410A refrigerant is being phased out in favor of R32 and R454B, potentially complicating service availability after 2025
Who Should Buy
Best For
Homeowners in mild to moderate climates upgrading from 10-13 SEER systems will see meaningful energy savings. Contractors installing systems in homes with attic space constraints and tight budgets benefit from the compact footprint and straightforward variable-speed operation.
Consider Alternatives If
Buyers in extreme climates requiring maximum heating capacity or those prioritizing whisper-quiet operation should explore two-stage or inverter-driven compressor models instead.
Installation
Installation complexity is moderate and straightforward for experienced HVAC technicians. The system accepts 3/8-inch liquid and 1 1/8-inch suction lines with standard sweat valve connections. Included pre-insulated suction line tubing (1/2-inch thickness, 50 feet) simplifies rough-in work. Flexible backup heat options from 3 to 20 kilowatts let installers customize heating capacity to local climate demands. Most installations complete in 4-6 hours for experienced crews.
Warranty & Reliability
Goodman provides a 10-year manufacturer warranty when you register the unit online, covering compressor, refrigerant circuit, and components. This coverage aligns with industry standards for mid-range equipment but falls short of premium brands offering 12-year protection. Registration is straightforward through Goodman's website, and documentation requirements are minimal.
Specifications
| SKU | LS381183850 |
| Brand/Manufacturer | Online Supply |
| Cooling BTU | 42,000 |
| Heating BTU | 42,000 |
| Refrigerant | R410A |
| Electrical | 208 / 230 V. 1 Phase 60 Hz |
| Warranty | 10 Years with Online Registration |
| Decibel Level (dBA) | 73 |
| Weight (in lbs) | 48.000000 |
| 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 | 35 amps |
| Tonnage | 3.5 Ton |
| Height | 36" |
| Width | 29" |
| Depth | 29" |
| Resources | Goodman Specifications Goodman Customer Brochure Goodman Installation Instructions Goodman Kit Instructions Goodman Parts Manual Goodman Service Manual 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. |
| Configuration | Horizontal |
| Liquid Line | 3/8" |
| Suction Line | 1 1/8" |
| Style | A-Coil |
| Product Features | Rebate Available |
| Energy Star | Yes |
| SEER1 (Efficiency) | 16 |
| Condenser Stages | Single Stage |
| Compressor Type | Scroll |
| Liquid Valve Size | 3/8" |
| Suction Valve Size | 7/8" |
| Min. Breaker Size | 22.4 amps |
| Valve Type | Sweat |
| Suction Line Insulation Thickness | 1/2" |
| Length | 50 feet |
Frequently Asked Questions
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