Review
The Goodman 3 Ton/5 Ton downflow gas furnace and air conditioning system targets contractors and homeowners needing substantial heating capacity in demanding climates. Manufactured by Online Supply under SKU LS38783850, this dual-fuel unit combines an 80,000 BTU furnace with a 34,800 BTU cooling condenser in a compact 30 by 21 by 21 inch cabinet. The system qualifies for ENERGY STAR certification and carries a 10-year warranty upon online registration, positioning it competitively for budget-conscious buyers prioritizing efficiency.
Performance specifications reveal impressive efficiency ratings. The furnace delivers 96% AFUE, meaning 96 cents of every heating dollar goes toward home warmth, while the condenser achieves 16 SEER1 cooling efficiency. A variable-speed ECM blower motor modulates airflow up to 1,600 CFM, and the two-stage burner adjusts heating output for part-load comfort. Powered by 115V single-phase 60 Hz electrical service with 18.7 to 30 amp breaker sizing, installation integrates into standard residential panels. Scroll compressor technology and R410A refrigerant provide proven reliability in the field.
Pros & Cons
Pros
- 96% AFUE furnace efficiency reduces heating costs significantly in winter months
- 16 SEER1 cooling rating exceeds ENERGY STAR requirements for air conditioning efficiency
- Two-stage burner and variable-speed ECM blower motor optimize comfort and efficiency across heating/cooling cycles
- 80,000 BTU heating capacity handles severe cold climates effectively
- 10-year warranty with online registration provides solid long-term protection
Cons
- 5-ton cooling capacity appears oversized against advertised 3-ton specification, creating potential efficiency and cycling issues
- 73.5 dB noise level is moderately loud, especially if outdoor unit placement is near living spaces
- Requires PVC/plastic exhaust flue, limiting installation flexibility in some retrofit applications
Who Should Buy
Best For
Northern homeowners and contractors building new installations where powerful heating is essential and existing ductwork supports 1,600 CFM airflow. This system works well for properties requiring 80,000 BTU heating output during extended cold seasons.
Consider Alternatives If
Mild-climate homeowners seeking a matched 3-ton system should verify tonnage compatibility before purchasing, as the 5-ton capacity may short-cycle and waste energy.
Installation
Installation requires standard ductwork connections with 3/8 inch liquid and 7/8 inch suction line sizing. The downflow/horizontal configuration suits basements, crawlspaces, or mechanical closets. PVC or plastic exhaust flue venting is mandatory, limiting options compared to flexible metal ducting. Professional installation is strongly recommended to ensure proper refrigerant charging, gas line connections, and electrical hookup. Documentation includes CAPT installation manuals and specification sheets for reference.
Warranty & Reliability
The 10-year parts warranty activates upon online registration, covering compressor, scroll pump, and heat exchanger defects. This extended coverage distinguishes Goodman in the budget-to-mid tier. Labor costs fall outside warranty terms, so budget for service calls independently. The included evaporator coil warranty adds protection for air-side components, reducing total-system vulnerability to common failures.
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 | 5 Ton |
| Height | 30" |
| Width | 21" |
| Depth | 21" |
| Resources | CAPT Installation Manual CAPT Specifications Sheet Goodman Evaporator Coil 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. |
| AHRI Certificate Number | 7368843 |
| Airflow Direction | Downflow/Horizontal |
| Exhaust Flue Requirement | Plastic / PVC |
| Product Features | Rebate Available |
| Furnace Efficiency / AFUE | 96% |
| Blower Motor | Variable Speed - ECM |
| Maximum CFM | 1600 |
| Configuration | Upflow / Downflow |
| Burner Stages | Two |
| Fuel Type | Propane, Natural Gas |
| Liquid Line | 3/8" |
| Suction Line | 7/8" |
| Style | A-Coil |
| Suction Line Insulation Thickness | 3/4" |
| Length | 50 feet |
Frequently Asked Questions
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