Review
The 4-ton Goodman variable-speed heat pump positions itself as a mid-to-premium solution for contractors and homeowners balancing efficiency, flexibility, and installation constraints. Manufactured by Online Supply under SKU LS381183850, this horizontal A-coil unit delivers 48,000 BTU cooling and heating capacity with an impressive 16 SEER1 efficiency rating. Energy Star certification confirms compliance with modern environmental standards. The unit weighs 48 pounds and fits tight attic spaces measuring 35 inches wide by 35.5 inches deep by 35 inches tall, making it substantially more adaptable than vertical counterparts.
Performance specifications reveal a well-engineered system for variable-load applications. The ECM variable-speed blower motor operates between 0 and 2,000 CFM, automatically adjusting based on conditioning demand rather than cycling on and off like fixed-speed competitors. R410A refrigerant charge pairs with a scroll compressor delivering single-stage cooling and heating. With 1/8-inch suction lines and 3/8-inch liquid lines, the unit connects efficiently to most existing ductwork. Electrical requirements span 208/230V single-phase, drawing 26.4 to 45 amps depending on backup heat configuration.
Pros & Cons
Pros
- 16 SEER1 efficiency rating exceeds most standard units, reducing energy costs by approximately 20-25% compared to 13 SEER equipment
- Variable-speed ECM blower motor adjusts output from 0 to 2,000 CFM, improving comfort through gradual temperature changes and quieter operation
- Horizontal A-coil configuration fits tight attic spaces where vertical units cannot install, maximizing placement flexibility
- Multiple electric backup heat options ranging from 3 kW to 20 kW accommodate diverse climate needs and existing ductwork
- 10-year warranty with online registration covers compressor and parts, providing solid protection against manufacturing defects
Cons
- Single-stage condenser limits efficiency gains during partial-load operation, reducing peak performance in mild weather
- 74 dBA noise level runs moderately loud for some homeowners, particularly in quiet suburban settings
- Requires 26.4 to 45 amp breaker sizing, necessitating potential electrical panel upgrades in older homes with limited capacity
Who Should Buy
Best For
Contractors installing systems in homes with limited indoor space and homeowners in moderate climates seeking long-term energy savings. This unit works particularly well for attic retrofits where horizontal clearance exceeds vertical availability.
Consider Alternatives If
Budget-conscious buyers prioritizing lowest upfront cost over efficiency, or anyone in extremely hot climates where high-stage compressor cycling would justify higher tonnage requirements.
Installation
Installation complexity rates moderate to straightforward for certified HVAC technicians. The horizontal configuration requires adequate attic or basement depth but eliminates vertical clearance headaches. Standard sweat-valve connections use 3/8-inch and 1-1/8-inch lines with 1/2-inch suction insulation pre-installed across 50 feet. Optional electric backup heat (3 kW through 20 kW) may require separate circuit installation. Goodman provides comprehensive documentation including installation guides, kit instructions, and service manuals in PDF format.
Warranty & Reliability
Goodman extends a 10-year parts and compressor warranty upon online registration, covering manufacturing defects across all major components. This protection ranks above industry minimum but trails some premium manufacturers offering 12-year coverage. Warranty registration is mandatory, so documentation retention becomes important. For contractors, the 10-year window provides solid customer confidence and reasonable claims support through Goodman's established service network.
Specifications
| SKU | LS381183850 |
| Brand/Manufacturer | Online Supply |
| Cooling BTU | 48,000 |
| Heating BTU | 48,000 |
| Refrigerant | R410A |
| Electrical | 208 / 230 V. 1 Phase 60 Hz |
| Warranty | 10 Years with Online Registration |
| Decibel Level (dBA) | 74 |
| 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 | 45 amps |
| Tonnage | 4 Ton |
| Height | 35" |
| Width | 35.5" |
| Depth | 35.5" |
| 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 | 26.4 amps |
| Valve Type | Sweat |
| Suction Line Insulation Thickness | 1/2" |
| Length | 50 feet |
Frequently Asked Questions
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