Review
The Goodman 3.5-ton gas furnace and air conditioner system with horizontal A-coil configuration targets the practical contractor and cost-conscious homeowner looking for reliable, efficient climate control without premium pricing. Manufactured by Goodman through Online Supply, this unit combines strong heating efficiency with respectable cooling performance in a footprint designed for tight residential installations where vertical mounting isn't possible.
The furnace delivers exceptional heating efficiency at 97% AFUE with a modulating burner that adjusts flame height across multiple stages, reducing energy waste during partial-load operation. Cooling performance reaches 34,800 BTU with 16 SEER2 efficiency from a scroll compressor, while the variable-speed ECM blower motor optimizes airflow up to 1600 CFM. Energy Star certification confirms compliance with strict efficiency standards. The 115V, single-phase electrical requirement keeps installation straightforward in most residential panels.
Pros & Cons
Pros
- 97% AFUE furnace efficiency reduces heating costs significantly compared to standard 80-85% units
- Modulating burner stages fuel consumption precisely to match demand, improving comfort and efficiency
- 16 SEER2 cooling efficiency exceeds the 14 SEER nameplate, meaning better summer performance than expected
- Variable-speed ECM blower motor handles both heating and cooling with optimized airflow up to 1600 CFM
- Compact horizontal A-coil design fits tight attic or basement spaces where vertical units won't fit
- 10-year warranty with online registration provides solid protection on compressor and components
Cons
- Single-stage compressor limits cooling efficiency compared to two-stage or variable-speed models in partial-load conditions
- 73.5 dB noise level during cooling operation is louder than high-efficiency inverter-driven competitors
- 3.5-ton capacity slightly oversized if home cooling load is truly 3 tons, causing short-cycling risk
Who Should Buy
Best For
Homeowners in heating-dominant climates replacing older 80% AFUE furnaces will see the strongest payback, especially in homes with tight spaces requiring horizontal configuration. Contractors installing systems where upfront cost matters more than ultra-premium efficiency will find this unit delivers solid balance between performance and budget.
Consider Alternatives If
Buyers in mild climates where cooling dominates or those seeking the absolute quietest operation should explore variable-capacity or inverter-driven systems instead.
Installation
This horizontal unit requires proper ductwork clearance above or beside the installation location, with 50 feet of pre-insulated suction line included. The 3/8-inch liquid line and 7/8-inch suction line connect to standard R410A refrigerant systems. Plastic PVC exhaust flue (right-side location) must vent outdoors. Most installations complete in 4-6 hours for experienced technicians familiar with Goodman systems.
Warranty & Reliability
Goodman provides a standard 10-year warranty when you register the unit online, covering compressor and component defects. This registration-based coverage is common in the industry and protects your investment against manufacturing failures. Many contractors bundle extended warranties, so ask about options at purchase.
Specifications
| SKU | LS38783850 |
| Brand/Manufacturer | Online Supply |
| Cooling BTU | 34,800 |
| Heating BTU | 80,000 |
| Refrigerant | R410A |
| Electrical | 115 V. 1 Phase 60 Hz |
| Warranty | 10 Years with Online Registration |
| Decibel Level (dBA) | 73.5 |
| Weight (in lbs) | 30.000000 |
| 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 | 30 amps |
| Min. Breaker Size | 18.7 amps |
| Tonnage | 3.5 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 | 7/8" |
| Style | A-Coil |
| AHRI Certificate Number | 7424271 |
| Airflow Direction | Downflow/Horizontal |
| Exhaust Flue Requirement | Plastic / PVC |
| Product Features | Rebate Available |
| Furnace Efficiency / AFUE | 97% |
| Blower Motor | Variable Speed - ECM |
| Maximum CFM | 1600 |
| Flue Location | Right |
| Burner Stages | Modulating |
| Fuel Type | Propane, Natural Gas |
| Suction Line Insulation Thickness | 3/4" |
| Length | 50 feet |
Frequently Asked Questions
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