Review
The Goodman 3-ton downflow system represents solid mid-market positioning for contractors seeking reliable heating and cooling without premium pricing. Goodman maintains strong presence in the HVAC replacement market, and this configuration addresses common retrofit scenarios where downflow delivery is required. At $89 for a complete condenser unit, the pricing is aggressive, though careful specification verification is warranted given the tonnage inconsistencies in the product data.
Performance figures are impressive on the heating side. The 80,000 BTU furnace achieves 97% AFUE using a modulating burner that varies output based on heating demand, reducing on-off cycling and maintaining steadier indoor temperatures. Cooling capacity reaches 35,000 BTU with 18 SEER1 efficiency through a two-stage scroll compressor operating on R410A refrigerant. The variable-speed ECM blower delivers up to 1600 CFM, optimizing airflow across the A-coil heat exchanger while maintaining quiet operation at 71 dBA.
Pros & Cons
Pros
- 97% AFUE furnace efficiency, among the highest available for gas systems
- 18 SEER1 cooling efficiency qualifies for ENERGY STAR certification
- Modulating burner adjusts heating output for consistent comfort and lower gas consumption
- Variable-speed ECM blower motor delivers 1600 CFM maximum airflow with quiet operation at 71 dBA
- PVC exhaust compatibility simplifies venting installations compared to metal flue requirements
Cons
- Specs show conflicting tonnage ratings, listing both 3 ton and 5 ton, which creates confusion for sizing verification
- 35,000 BTU cooling capacity doesn't match typical 3-ton system output, requiring AHRI certification cross-reference
- Limited online documentation available compared to premium Goodman models
Who Should Buy
Best For
Contractors outfitting homes in cold or moderate climates where heating bills justify high AFUE investment, and homeowners replacing older furnaces who want energy savings without high-end pricing. This system works well in northern regions where the furnace runs heavily during winter months.
Consider Alternatives If
Homeowners in hot climates where cooling dominates, since the emphasis here is furnace efficiency rather than advanced cooling features, and anyone uncertain about tonnage sizing should verify the discrepancy before purchasing.
Installation
The downflow A-coil configuration mounts vertically for applications requiring bottom discharge. Electrical requirements are modest, needing 115V single-phase 60Hz power with breaker sizing between 21.3 and 35 amps. Suction and liquid line sizes are 7/8 inch and 3/8 inch respectively, with 3/4 inch insulation thickness on suction lines. PVC venting compatibility simplifies flue installation compared to rigid metal alternatives common in older systems.
Warranty & Reliability
Goodman provides a 10-year parts and compressor warranty upon online registration. This coverage is standard across Goodman's residential lineup and covers manufacturing defects. Registration is straightforward but required to activate full protection, so homeowners should complete this immediately after installation to ensure claims eligibility.
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 | Rebate Available |
| 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 | 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 |
| Liquid Line | 3/8" |
| Suction Line | 7/8" |
| Style | A-Coil |
| AHRI Certificate Number | 7424271 |
| Airflow Direction | Downflow/Horizontal |
| Exhaust Flue Requirement | Plastic / PVC |
| 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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