Review
This 3-ton Goodman split system from Online Supply combines a 80,000 BTU gas furnace with a 35,000 BTU air conditioner in a compact horizontal A-coil configuration. The system targets homeowners seeking reliable HVAC equipment at reasonable cost, and it arrives fully assembled for quick deployment. Goodman's reputation for durability and straightforward engineering appeals to both DIY installers and professional contractors accustomed to the brand's no-frills approach.
The furnace delivers 98% AFUE efficiency using a modulating burner that adjusts flame intensity based on heating demand, significantly reducing standby losses. The condenser section achieves 18 SEER2 efficiency in two-stage operation, meaning it runs at reduced capacity on mild days rather than cycling on and off constantly. The variable-speed ECM blower motor in the furnace automatically matches airflow to load, improving both comfort and energy performance. Operational noise stays reasonable at 71 dB during two-stage cooling, comparable to mid-tier competitor units.
Pros & Cons
Pros
- 98% AFUE furnace efficiency with modulating burner reduces heating costs year-round
- 18 SEER2 rating on condenser exceeds the title claim, delivering better cooling efficiency than advertised
- Variable-speed ECM blower motor automatically adjusts airflow, improving comfort and reducing runtime
- Two-stage condenser provides quieter operation at 71 dB during light cooling loads
- Sweat-connection valve design simplifies field installation for experienced technicians
- Energy Star certified and includes 10-year warranty with online registration
Cons
- Product listing contains conflicting tonnage specs (3 ton vs. 3.5 ton), creating confusion at purchase
- Title claims 17 SEER but specs show 18 SEER2, suggesting outdated or mismatched marketing materials
- Requires proper nitrogen purging and evacuation during installation, adding labor cost if not handled correctly
- Scroll compressor in condenser unit is reliable but less field-serviceable than rotary alternatives
Who Should Buy
Best For
Homeowners in northern or mixed climates where heating runtime justifies a high-efficiency furnace, and those planning to stay in their homes 10+ years to recoup the upfront cost. Also suitable for contractors stocking quality equipment at competitive price points.
Consider Alternatives If
Buyers in warm climates where cooling dominates should prioritize higher SEER ratings; those needing same-day installation may want local service support instead of online-only suppliers.
Installation
This unit requires sweat-connection refrigerant lines using standard 3/8-inch liquid and 7/8-inch suction connections with 3/4-inch insulation. The horizontal configuration suits attics or crawlspaces with limited vertical clearance. Installation demands proper nitrogen purging, vacuum evacuation to 500 microns, and electrical work within 21.3 to 35-amp breaker range at 115V single-phase. Technicians unfamiliar with refrigerant work should engage licensed HVAC professionals.
Warranty & Reliability
Online Supply provides a 10-year parts warranty upon online registration after purchase. This is competitive with major brands and covers compressor, heat exchanger, and most internal components. Warranty excludes wear items and requires proper installation and maintenance. Registration is straightforward but mandatory to activate coverage, so save your documentation.
Specifications
| SKU | LS38783850 |
| Brand/Manufacturer | Online Supply |
| Cooling BTU | 35,000 |
| Heating BTU | 80,000 |
| Refrigerant | R410A |
| Electrical | 115 V. 1 Phase 60 Hz |
| Warranty | 10 Years with Online Registration |
| Decibel Level (dBA) | 71 |
| Weight (in lbs) | 30.000000 |
| Feature | Spec |
| Product Features | Two Stage Condenser |
| Energy Star | Yes |
| SEER1 (Efficiency) | 18 |
| Condenser Stages | Two Stage |
| Compressor Type | Scroll |
| Liquid Valve Size | 3/8" |
| Suction Valve Size | 3/4" |
| Max Breaker Size | 35 amps |
| Min. Breaker Size | 21.3 amps |
| Tonnage | 3.5 Ton |
| Valve Type | Sweat |
| Height | 34.5" |
| Width | 21" |
| Depth | 28.75" |
| Resources | Goodman Brochure Goodman Installations 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 | Upflow/Horizontal |
| Liquid Line | 3/8" |
| Suction Line | 7/8" |
| Style | A-Coil |
| AHRI Certificate Number | 7424266 |
| Airflow Direction | Upflow/Horizontal |
| Exhaust Flue Requirement | Plastic / PVC |
| Furnace Efficiency / AFUE | 97% |
| Blower Motor | Variable Speed - ECM |
| Maximum CFM | 1600 |
| Burner Stages | Modulating |
| Fuel Type | Propane, Natural Gas |
| Suction Line Insulation Thickness | 3/4" |
| Length | 50 feet |
Frequently Asked Questions
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