Review
Goodman's 3.5/5 ton combined furnace-air conditioner system lands squarely in the practical middle market for residential HVAC. This isn't a premium variable-capacity unit, but it delivers solid efficiency ratings backed by manufacturer stability. The unit ships as a downflow A-coil configuration, making it suitable for attic or basement installations where space is tight. Energy Star certification and a reasonable price point make it appealing for contractors managing multiple replacement jobs.
The heating side produces 100,000 BTU output at 96% AFUE efficiency, meaning minimal fuel waste and measurable savings on gas bills. The cooling side rates at 16 SEER1 with 42,000 BTU capacity from a scroll compressor. The two-stage burner and variable-speed ECM blower motor allow the system to ramp down during mild conditions, improving comfort and efficiency compared to fixed-output competitors. At 73 dB, noise levels are moderate and typical for this class, though sensitive listeners may notice operation.
Pros & Cons
Pros
- 96% AFUE furnace efficiency means lower winter heating bills, especially in gas-dependent regions
- 16 SEER1 cooling rating is well above the 13 SEER minimum for Energy Star qualification
- Two-stage burner and variable-speed ECM blower allow modulated operation for comfort and efficiency
- PVC exhaust compatibility simplifies venting in retrofit applications and older homes
- Scroll compressor design is industry-standard reliable with lower failure rates than rotary types
- 10-year warranty with online registration provides solid peace of mind on major components
Cons
- Single-stage condenser limits cooling modulation compared to two-stage models, reducing part-load efficiency
- 73 dB operating noise is moderately loud, noticeable in quiet neighborhoods or during evening operation
- Title lists 3.5 ton with 5 ton specs, creating confusion about actual system capacity and matched tonnage
Who Should Buy
Best For
Contractors installing complete system replacements in residential homes with existing downflow ductwork will find this unit straightforward to configure. Homeowners in moderate climates seeking honest efficiency gains over 10-year-old units without spending on premium inverter technology will get reliable value.
Consider Alternatives If
Buyers in very hot climates needing aggressive cooling or homes where noise matters should explore two-stage condenser options instead.
Installation
Installation requires 115V single-phase power with breaker capacity between 23.5 and 40 amps, standard for most residential panels. Suction line comes pre-insulated with 1/2 inch foam and 50 feet of line set. Valve sizes (3/8 inch liquid, 7/8 inch suction) match common field copper fittings. PVC exhaust venting simplifies installation in homes without existing metal flue infrastructure. Total unit weight of 48 pounds requires minimal rigging.
Warranty & Reliability
Goodman provides 10 years of parts and labor coverage when registered online at activation. This covers compressor failure, heat exchanger cracks, and electrical component defects. Registration is straightforward and provides protection equal to units costing significantly more. Coverage does not include refrigerant, which is typical across the industry.
Specifications
| SKU | LS381183850 |
| Brand/Manufacturer | Online Supply |
| Cooling BTU | 42,000 |
| Heating BTU | 100,000 |
| Refrigerant | R410A or R22 |
| Electrical | 115 V. 1 Phase 60 Hz |
| Warranty | 10 Years with Online Registration |
| Decibel Level (dBA) | 73 |
| Weight (in lbs) | 48.000000 |
| 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 | 40 amps |
| Min. Breaker Size | 23.5 amps |
| Tonnage | 5 Ton |
| Height | 34.5" |
| Width | 21" |
| Depth | 28.75" |
| Resources | Goodman Brochure Goodman Installation Instructions Goodman Parts Manual Goodman Service Manual Goodman Specifications Goodman Technical Information Goodman User Information 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 | Downflow/Horizontal |
| Liquid Line | 3/8" |
| Suction Line | 1 1/8" |
| Style | A-Coil |
| AHRI Certificate Number | 7368844 |
| Airflow Direction | Downflow/Horizontal |
| Exhaust Flue Requirement | Plastic / PVC |
| Product Features | Rebate Available |
| Furnace Efficiency / AFUE | 96% |
| Blower Motor | Variable Speed - ECM |
| Maximum CFM | 2000 |
| Burner Stages | Two |
| Fuel Type | Propane, Natural Gas |
| Suction Line Insulation Thickness | 1/2" |
| Length | 50 feet |
Frequently Asked Questions
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