Review
The Goodman 3 Ton gas furnace and air conditioner system positions itself as an efficient, all-in-one solution for homeowners seeking to replace aging HVAC equipment. Goodman maintains solid brand recognition among contractors for reliable residential equipment at competitive pricing. This downflow configuration suits homes where the unit installs in an attic or basement with ductwork running downward, a common setup in many U.S. markets. The Energy Star certification signals compliance with efficiency standards, though the title specs versus actual specs warrant careful review before purchase.
On the heating side, this furnace delivers 97% AFUE efficiency with 100,000 BTU output and modulating burner stages that adjust flame height for better comfort and lower energy use. Cooling performance registers at 16 SEER, higher than the 15 SEER listed in the product title. The variable-speed ECM blower motor with 2000 CFM maximum capacity pulls double duty on both heating and cooling, allowing the system to ramp up or down based on demand. R410A refrigerant compatibility aligns with current EPA standards.
Pros & Cons
Pros
- 97% AFUE furnace efficiency means only 3% heat loss, among the highest you'll find in gas furnaces
- 16 SEER cooling rating outperforms the 15 SEER stated in the title, delivering better summer performance
- Modulating burner stages and variable-speed ECM blower optimize comfort and reduce energy waste throughout the heating cycle
- 100,000 BTU heating capacity handles most residential applications without oversizing
- Energy Star certified with rebate availability, offsetting some upfront costs
- 10-year warranty with online registration provides solid coverage for both components
Cons
- Spec inconsistency between title (15 SEER) and actual rating (16 SEER) raises questions about which applies to your system
- Single-stage compressor limits part-load efficiency compared to two-stage alternatives, though modulating burner compensates on heat side
- 5-ton condenser paired with this furnace suggests oversizing concerns, potential for short cycling and humidity control issues
- 73.5 dBA noise level is moderate to loud, noticeable during operation especially in quiet neighborhoods
Who Should Buy
Best For
Homeowners in climates with cold winters and moderate cooling needs who prioritize heating efficiency and want a turnkey combo system from a trusted manufacturer. Ideal for replacing aging furnace-AC combinations where both components have reached end of life simultaneously.
Consider Alternatives If
Anyone seeking a precisely matched system should verify the tonnage discrepancy before purchasing, as the title lists 3 ton but specs show 5 ton, which could indicate a data error or configuration mismatch.
Installation
This downflow unit requires 115V single-phase power with breaker sizing between 18.7 and 30 amps, straightforward for most homes. PVC plastic exhaust flue is required, which modern installations typically use anyway. The A-coil configuration demands compatible ductwork, and the 3/8-inch liquid line with 7/8-inch suction line connect using standard refrigeration fittings. Professional installation is strongly recommended to verify proper tonnage matching and avoid efficiency penalties.
Warranty & Reliability
Goodman backs this system with 10 years of parts coverage when you register online after purchase. This warranty applies to both the furnace and air conditioning components, covering compressor and heat exchanger defects. Registration is straightforward and extends protection without additional cost. Labor and refrigerant are typically excluded, so review the full warranty terms before signing.
Specifications
| SKU | LS38783850 |
| Brand/Manufacturer | Online Supply |
| Cooling BTU | 34,800 |
| Heating BTU | 100,000 |
| 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 | 5 Ton |
| 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 | 7424272 |
| Airflow Direction | Downflow/Horizontal |
| Exhaust Flue Requirement | Plastic / PVC |
| Product Features | Rebate Available |
| Furnace Efficiency / AFUE | 97% |
| Blower Motor | Variable Speed - ECM |
| Maximum CFM | 2000 |
| Burner Stages | Modulating |
| Fuel Type | Propane, Natural Gas |
| Suction Line Insulation Thickness | 3/4" |
| Length | 50 feet |
Frequently Asked Questions
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