Review
The Goodman 3-ton combination system combines a 100,000 BTU gas furnace with a 34,800 BTU cooling coil in a compact upflow A-coil design. Manufactured by Online Supply under the Goodman brand, this unit targets homeowners seeking reliable efficiency without flagship pricing. The modulating furnace burner and variable-speed blower represent practical efficiency upgrades over single-stage competitors still common in older homes.
Efficiency numbers impress here. The furnace reaches 97% AFUE, meaning nearly all fuel converts to heat with minimal waste up the flue. Cooling arrives at 16 SEER2, beating typical 3-ton baseline units by 2 to 3 points. The variable-speed ECM blower motor ramps output based on demand, reducing unnecessary fan cycling. Energy Star certification confirms these claims, and most utilities offer incentives for qualified installations.
Pros & Cons
Pros
- 97% AFUE furnace efficiency with modulating burner stages reduces heating costs year-round
- 16 SEER2 cooling rating exceeds the 3-ton requirement, optimizing summer performance
- Variable-speed ECM blower motor adjusts automatically, improving comfort and lowering electricity use
- Energy Star certified system qualifies for utility rebates in many regions
- 10-year warranty with online registration provides solid protection for parts coverage
Cons
- 5-ton cooling capacity creates oversizing mismatch with the stated 3-ton specification, potentially causing short-cycling and humidity control issues
- Single-stage compressor design less efficient than two-stage alternatives at partial cooling loads
- 73.5 dB noise level at full capacity may be noticeable in quiet residential settings
Who Should Buy
Best For
Homeowners replacing decade-old furnace and AC units in upflow-compatible attic or basement spaces will appreciate the efficiency gains and lower operating costs. This system makes sense for those seeking reliable performance without paying for premium variable-capacity cooling.
Consider Alternatives If
Skip this if your home already has a properly sized 5-ton system, or if you need two-stage compressor quiet operation, or if downflow configuration is required.
Installation
Installation requires standard upflow mounting in attics, basements, or closets with adequate clearance. The 34.5-inch height and 21-inch width fit most standard framing cavities. Suction and liquid lines measure 7/8 inch and 3/8 inch respectively, with 3/4-inch insulation on suction tubing. Electrical runs 115V single-phase 60Hz, demanding 18.7 to 30-amp breaker protection. PVC exhaust flue simplifies venting in modern homes.
Warranty & Reliability
Goodman covers parts for 10 years upon online registration, standard for mid-tier equipment today. This protects against compressor failure, heat exchanger cracks, and blower motor burnout. Labor and refrigerant typically cost extra. Registration is mandatory to activate coverage, so save documentation carefully. Coverage excludes preventive maintenance and routine service calls.
Specifications
| SKU | LS38783850 |
| Brand/Manufacturer | Online Supply |
| Cooling BTU | 34,800 |
| Heating BTU | 100,000 |
| 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 | 34.5" |
| Width | 21" |
| Depth | 28.75" |
| Resources | Goodman Brochure Goodman Specifications 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 | 7424267 |
| Airflow Direction | Upflow/Horizontal |
| Exhaust Flue Requirement | Plastic / PVC |
| Product Features | Rebate Available |
| Furnace Efficiency / AFUE | 97% |
| Blower Motor | Variable Speed - ECM |
| Maximum CFM | 2000 |
| 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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