Review
The Goodman 3-ton system represents a practical middle ground in the budget HVAC market. This unit pairs an 80,000 BTU furnace with a 34,800 BTU cooling coil, covering residential applications where heating and cooling demands are fairly balanced. Goodman builds the majority of contractor-grade systems, so parts availability and service technician familiarity are genuine advantages. At $647, this system costs significantly less than premium brands while maintaining respectable efficiency ratings.
Performance data tells a compelling story for heating-heavy regions. The 97% AFUE furnace wastes minimal fuel, while the modulating burner adjusts output continuously rather than cycling full on and off, reducing energy spikes. The SEER1 rating of 16 slightly exceeds the stated 14 SEER, suggesting conservative marketing. Cooling capacity of 34,800 BTU serves a 3-ton load appropriately. The variable-speed ECM blower motor matches airflow to actual heating or cooling demand, improving comfort and efficiency beyond single-speed alternatives at this price point.
Pros & Cons
Pros
- Modulating burner stages reduce energy waste by adjusting heat output to actual demand, not just on/off cycling
- 97% AFUE furnace efficiency recovers nearly all combustible energy, translating to measurable savings on monthly gas bills
- Variable-speed ECM blower motor adapts airflow between heating and cooling cycles, improving comfort and reducing runtime
- SEER1 rating of 16 exceeds the 14 SEER stated in the title, indicating real-world cooling efficiency above spec
- Energy Star certified across both heating and cooling components, qualifying for utility rebates in most regions
Cons
- Single-stage condenser limits part-load cooling efficiency during shoulder seasons when 3 tons may be overkill
- 73.5 dB noise level on cooling cycle is noticeably audible in quiet neighborhoods, louder than premium variable-speed units
- 3.5-ton actual tonnage creates slight mismatch with 3-ton marketing claim, potentially oversizing for smaller homes
Who Should Buy
Best For
Contractors installing replacement systems in homes where the existing ductwork and foundation support 3.5 tons. Homeowners in cold or mixed climates who run their furnace heavily and want modulating efficiency without paying variable-speed premium pricing.
Consider Alternatives If
Anyone in hot climates seeking primarily cooling efficiency, or buyers with noise-sensitive installations where 73.5 dB matters.
Installation
This upflow, A-coil configuration suits attic or closet installation with minimal complexity. It requires 115V single-phase power with a 30-amp maximum breaker, standard in residential panels. Plastic PVC exhaust flue is mandatory, supporting modern high-efficiency furnaces. The 7/8 inch suction line needs 3/4 inch insulation to prevent condensation and efficiency loss. Ductwork connections are straightforward for experienced installers.
Warranty & Reliability
Goodman backs this unit with a 10-year parts warranty upon online registration. This covers compressor and major components, protecting against manufacturing defects. Registration is essential, as unregistered units may receive limited warranty. Ten years is standard industry coverage and reasonable for budget-tier equipment, though premium brands occasionally offer 12-year terms.
Specifications
| SKU | LS38783850 |
| Brand/Manufacturer | Online Supply |
| Cooling BTU | 34,800 |
| Heating BTU | 80,000 |
| Refrigerant | R410A or R22 |
| 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 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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