Review
Goodman's 3.5 ton combo system represents the practical middle ground in residential HVAC. This upflow A-coil configuration matches most standard installations, and the gas furnace with air conditioning in one package simplifies both purchasing and installation coordination. Goodman's market position as a budget-friendly alternative to premium brands makes this system attractive to homeowners and contractors managing cost-sensitive replacements without sacrificing basic reliability.
The heating side delivers 80,000 BTU at 80% AFUE with a single-stage burner and PSC multi-speed blower, while cooling provides 42,000 BTU at an impressive 16 SEER1 rating (better than the advertised 14 SEER spec). The scroll compressor draws 22.4 to 35 amps at 120V single-phase 60Hz, making electrical integration straightforward. However, single-stage operation means the system cycles fully on and off rather than modulating, which can result in temperature swings in your home during moderate weather.
Pros & Cons
Pros
- 16 SEER1 cooling efficiency exceeds the stated 14 SEER rating, delivering better than advertised performance
- 80% AFUE furnace is straightforward and reliable with single-stage burner design, minimizing complex repairs
- 2000 CFM maximum airflow handles 3.5-5 ton cooling demand effectively across most homes
- Scroll compressor design offers proven durability in residential applications
- 120V single-phase electrical requirement simplifies installation without dedicated circuits
Cons
- 80% AFUE lags modern high-efficiency models (95%+), resulting in higher heating costs over system lifetime
- Single-stage compressor and burner cycle on-off rather than modulate, creating temperature swings and less comfort
- 73 dB noise level is noticeably loud compared to two-stage alternatives during operation
- No variable-speed blower motor limits ability to optimize airflow and dehumidification in humid climates
Who Should Buy
Best For
Homeowners in moderate climates looking to replace a 10-15 year old system without major budget constraints. This system makes sense for those who plan to stay in their home 7-10 years and want reliability over premium efficiency features.
Consider Alternatives If
Skip this if you live in very cold climates where heating dominates your utility bills, or if you prioritize quiet operation and consistent comfort control.
Installation
Installation requires 3/8 inch liquid line and 7/8 inch suction line connections with sweat valve fittings. The 1/2 inch insulation on suction lines comes pre-wrapped for 50 feet of line set. Top flue exhaust requires metal ducting to code, and the 33.375 inch height with 21 inch width fits standard closet and basement configurations. Professional installation is strongly recommended to ensure proper refrigerant charging and gas line sealing.
Warranty & Reliability
Goodman backs this system with a full 10-year parts warranty upon online registration. No labor coverage is included, meaning you cover service calls after year one. This warranty is standard for the budget HVAC segment but shorter than mid-tier alternatives. Registration is required, so follow through immediately after installation to lock in coverage.
Specifications
| SKU | LS381183850 |
| Brand/Manufacturer | Online Supply |
| Cooling BTU | 42,000 |
| Heating BTU | 80,000 |
| Refrigerant | R410A |
| Electrical | 120 V. 1 Phase 60 Hz |
| Warranty | 10 Years with Online Registration |
| Decibel Level (dBA) | 73 |
| Weight (in lbs) | 48.000000 |
| Feature | Spec |
| 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" |
| Max Breaker Size | 35 amps |
| Min. Breaker Size | 22.4 amps |
| Tonnage | 5 Ton |
| Valve Type | Sweat |
| Height | 33 3/8" |
| Width | 21" |
| Depth | 28 3/4" |
| Resources | Goodman Brochure Goodman Installation Manual Goodman Parts Manual Goodman Service Manual Goodman Specifications Goodman Technical Information Goodman User 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 | High Airflow |
| Liquid Line | 3/8" |
| Suction Line | 1 1/8" |
| Style | A-Coil |
| Exhaust Flue Requirement | Metal |
| Furnace Efficiency / AFUE | 80% |
| Blower Motor | Multi Speed - PSC |
| Maximum CFM | 2000 |
| Flue Location | Top |
| Burner Stages | Single |
| Fuel Type | Gas |
| Suction Line Insulation Thickness | 1/2" |
| Length | 50 feet |
Frequently Asked Questions
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