Review
Goodman's 3.5 ton system represents a practical middle-ground choice in the HVAC market. The combination of 96% AFUE gas furnace with 14 SEER air conditioner positions this unit as a workhorse for contractors replacing aging equipment. Downflow configuration suits attic or basement furnace placement. This system targets cost-conscious homeowners and volume installers who prioritize dependable performance over cutting-edge efficiency ratings.
The heating side delivers 120,000 BTU output with single-stage burner operation, translating to lower equipment cost and maintenance simplicity. Cooling capacity reaches 42,000 BTU with scroll compressor technology, a proven design choice across major manufacturers. The 14 SEER rating means roughly 25 percent better cooling efficiency than ten-year-old units still operating in many homes. Multi-speed blower motor at 2,000 CFM maximum allows contractors to right-size ductwork for optimal performance.
Pros & Cons
Pros
- 96% AFUE furnace efficiency reduces heating costs significantly compared to 80-90% units
- 14 SEER cooling meets modern efficiency standards without crossing into expensive variable-stage territory
- 120,000 BTU heating capacity handles most residential applications up to 3,500 sq ft
- Scroll compressor technology known for durability and consistent performance across operating conditions
- Multi-speed blower motor allows fine-tuning of airflow for comfort optimization
Cons
- Single-stage compressor means less precise cooling modulation in mild weather compared to two-stage competitors
- 73 dB operation is moderately loud during peak cooling cycles, noticeable in quiet neighborhoods
- Not ENERGY STAR certified, limiting rebate eligibility in some utility programs
Who Should Buy
Best For
Contractors installing replacement systems for mid-sized homes needing balanced heating and cooling performance. Homeowners in regions with significant winter heating demands who want strong AFUE efficiency without paying for premium variable-capacity equipment.
Consider Alternatives If
Buyers in mild climates prioritizing ultra-quiet operation should explore quieter two-stage models, as the 73 dB rating and single-stage design may feel unnecessary.
Installation
Installation requires 3/8 inch liquid lines and 7/8 inch suction lines with 3/8 inch insulation thickness. Downflow configuration needs vertical clearance of 34.5 inches with 24.5 inch width. PVC flue exhaust on right side simplifies venting through modern home construction. Standard 115V, 1-phase 60Hz electrical service with 22 to 35 amp breaker sizing fits typical residential panels. Experienced installers complete setup within one day.
Warranty & Reliability
Ten-year parts warranty requires online registration after purchase, standard across Goodman equipment. This extended coverage protects against compressor failure, heat exchanger cracks, and component defects. Registration is straightforward and completed during installation. Coverage does not include labor or refrigerant, typical limitations for this price tier.
Specifications
| SKU | LS38783830 |
| Brand/Manufacturer | Online Supply |
| Cooling BTU | 42,000 |
| Heating BTU | 120,000 |
| Refrigerant | R410A or R22 |
| Electrical | 115 V. 1 Phase 60 Hz |
| Warranty | 10 Years with Online Registration |
| Decibel Level (dBA) | 73 |
| Weight (in lbs) | 30.000000 |
| Feature | Spec |
| Energy Star | No |
| SEER1 (Efficiency) | 14 |
| 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 amps |
| Tonnage | 5 Ton |
| Height | 34.5" |
| Width | 24.5" |
| 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 | 7/8" |
| 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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