Review
The Goodman 3-ton gas furnace and air conditioner system represents the brand's traditional strength, delivering straightforward performance at competitive pricing. This upflow configuration handles both heating and cooling in one package, making it popular with contractors managing tight budgets. The SKU TX3N4 pairs a 100,000 BTU furnace with 35,000 BTU cooling capacity, suitable for homes ranging from 1,500 to 2,000 square feet depending on climate and insulation.
Performance metrics reveal a capable mid-tier system. The 18 SEER cooling rating and two-stage scroll compressor mean your air conditioning runs efficiently during moderate outdoor temperatures, saving money on summer electricity. The furnace delivers 80% AFUE efficiency, converting 80 cents of every fuel dollar into usable heat, which is standard rather than exceptional for natural gas equipment. The variable-speed blower motor running up to 2,000 CFM adapts to heating and cooling demands, reducing the constant full-speed operation common in older units.
Pros & Cons
Pros
- 18 SEER cooling efficiency hits the sweet spot between cost and performance for most residential applications
- Two-stage compressor and condenser reduce runtime and energy waste during partial-load conditions
- Variable-speed blower motor adapts to demand, improving comfort and reducing noise compared to single-speed alternatives
- 100,000 BTU heating capacity with two-stage burners handles most 3-ton applications without oversizing
- Upflow and downflow configuration flexibility accommodates various installation scenarios
- 10-year warranty with online registration provides solid coverage at this price point
Cons
- 80% AFUE is baseline efficiency for natural gas furnaces, not competitive with high-efficiency 95% AFUE models
- 71 dB noise level is audible during operation, especially compared to variable-capacity competitors
- R410A refrigerant is being phased out, limiting long-term serviceability after 2025
Who Should Buy
Best For
Contractors installing complete systems for cost-conscious residential customers in moderate climates, and homeowners replacing older equipment who want reliable cooling and heating without premium pricing. This system delivers proven Goodman quality at an accessible price point.
Consider Alternatives If
Anyone in very hot or cold climates requiring maximum efficiency should compare 95% AFUE furnaces and 20+ SEER cooling units despite higher upfront costs.
Installation
Installation requires standard sheet metal work for ductwork connections, with refrigerant line sizing straightforward at 3/8 inch liquid and 7/8 inch suction. The metal exhaust flue needs proper venting, and electrical demands a 208/230V single-phase 60 Hz circuit with 21.9 to 35 amp breaker capacity. A-coil design fits inside ducts for upflow installations. Most contractors complete installation in 4 to 6 hours for straightforward replacements.
Warranty & Reliability
Goodman backs this system with a 10-year parts warranty when you register online, covering compressor, motor, and heat exchanger defects. This is solid protection for the price range, though shorter than some competitors offering 12-year terms. Labor costs fall to you, so factor service call fees into maintenance budgeting.
Specifications
| SKU | TX3N4 |
| Brand/Manufacturer | Goodman |
| Cooling BTU | 35,000 |
| Heating BTU | 100,000 |
| Refrigerant | R410A |
| Electrical | 208 / 230 V. 1 Phase 60 Hz |
| Warranty | 10 Years with Online Registration |
| Decibel Level (dBA) | 71 |
| Weight (in lbs) | 2.500000 |
| Feature | Spec |
| Airflow Direction | Upflow/Horizontal |
| Exhaust Flue Requirement | Metal |
| Furnace Efficiency / AFUE | 80% |
| Blower Motor | Variable Speed |
| Maximum CFM | 2000 |
| Configuration | Upflow / Downflow |
| Burner Stages | Two |
| Fuel Type | Propane, Natural Gas |
| Height | 38.25" |
| Width | 35.5" |
| Depth | 35.5" |
| Resources | Goodman Specifications Goodman Installation Manual 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. |
| Liquid Line | 3/8" |
| Suction Line | 7/8" |
| Tonnage | 3 Ton |
| Style | A-Coil |
| Energy Star | Yes |
| SEER1 (Efficiency) | 18 |
| Condenser Stages | Two Stage |
| Compressor Type | Scroll |
| Liquid Valve Size | 3/8" |
| Suction Valve Size | 7/8" |
| Max Breaker Size | 35 amps |
| Min. Breaker Size | 21.9 amps |
| Valve Type | Sweat |
Frequently Asked Questions
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