Review
The Goodman 3.5 Ton gas furnace and air conditioner system represents a practical middle ground in residential HVAC. While product listings show some spec confusion (tonnage marked as both 3.5 and 5), the core equipment delivers what contractors expect from Goodman, a brand known for reliable workhorse equipment rather than premium performance. The downflow A-coil configuration fits attic and basement installations where headroom matters.
Performance metrics tell a solid story. The 96% AFUE rating significantly outpaces 80-85% units common in older homes, translating to real heating savings. On cooling, the 42,000 BTU capacity with 13 SEER provides adequate performance for moderate climates, though it trails 16+ SEER units gaining popularity. The reciprocating compressor uses R410A or R22 refrigerant and runs as a single-stage unit, meaning it powers full capacity when running rather than modulating output. Multi-speed blower handling up to 2000 CFM adjusts to actual demands.
Pros & Cons
Pros
- 96% AFUE heating efficiency reduces gas bills significantly compared to 80-85% units
- 42,000 cooling BTU with 13 SEER provides balanced seasonal performance for moderate climates
- Multi-speed blower motor adapts airflow to actual heating/cooling demand
- 10-year parts warranty with online registration offers solid peace of mind
- PVC flue compatibility simplifies venting and reduces installation costs
Cons
- 13 SEER is adequate but not premium, higher SEER models save more on cooling costs
- Single-stage compressor cycles on/off rather than modulating, less efficient than two-stage units
- 75 dB noise level is moderately loud, some homeowners may notice operation
- Not ENERGY STAR certified, meaning efficiency lags best-in-class alternatives
Who Should Buy
Best For
Contractors and homeowners replacing 15+ year old systems in mixed climates who prioritize heating efficiency and value straightforward installation. This unit suits homes where cooling demands are moderate and budget constraints prevent SEER 16+ equipment.
Consider Alternatives If
Anyone in hot climates needing aggressive cooling, homes seeking ENERGY STAR certification, or buyers who want cutting-edge variable-capacity technology.
Installation
Installation is straightforward for licensed contractors. The downflow/horizontal configuration with A-coil design suits basement or attic placement. PVC flue compatibility simplifies venting versus metal duct requirements on older units. You'll need 23.9 to 40 amp electrical service at 115V single phase. Refrigerant lines measure 3/8 inch liquid and 7/8 inch suction with sweat valve connections, standard for this tonnage class.
Warranty & Reliability
Ten-year parts coverage with online registration provides solid protection against manufacturing defects. This is respectable but not exceptional, as some competitors offer 10 years parts plus 5-year labor. The warranty protects component failure but not wear items like filter media or seasonal maintenance costs.
Specifications
| SKU | LS38783830 |
| 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) | 75 |
| Weight (in lbs) | 30.000000 |
| Feature | Spec |
| Energy Star | No |
| SEER1 (Efficiency) | 13 |
| Condenser Stages | Single Stage |
| Compressor Type | Reciprocating |
| Liquid Line | 3/8" |
| Suction Line | 7/8" |
| Liquid Valve Size | 3/8" |
| Max Breaker Size | 40 amps |
| Min. Breaker Size | 23.9 amps |
| Tonnage | 5 Ton |
| Valve Type | Sweat |
| 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 |
| Style | A-Coil |
| Airflow Direction | Downflow/Horizontal |
| Exhaust Flue Requirement | Plastic / PVC |
| Furnace Efficiency / AFUE | 96% |
| Blower Motor | Multi Speed |
| Maximum CFM | 2000 |
| Flue Location | Right |
| Burner Stages | Single |
| Fuel Type | Gas |
| Suction Line Insulation Thickness | 3/8" |
| Length | 30 feet |
Frequently Asked Questions
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