Review
The Goodman TX3N4 horizontal furnace-AC system bridges affordability and efficiency for contractors and homeowners managing tight budgets. At $3,225, this 3-ton combo delivers 120,000 BTU heating and 36,000 BTU cooling in a compact 24.5 x 26 x 21.125 inch footprint designed for attics and mechanical closets. The horizontal configuration and PVC exhaust option make retrofit installations straightforward in older homes where venting flexibility matters.
Performance centers on that 96% AFUE furnace rating, which means 96 cents of every heating dollar converts to usable warmth, well above the 78-80% baseline for older units. The variable-speed ECM blower runs at 2,000 CFM maximum but adjusts throughout the heating cycle, cutting electricity consumption versus fixed-speed motors. Two-stage burners and two-stage condenser keep the system from short-cycling, extending component life and maintaining steadier indoor temperatures.
Pros & Cons
Pros
- 96% AFUE furnace puts you in high-efficiency territory with lower heating bills year-round
- Variable-speed ECM blower automatically adjusts airflow, reducing runtime costs and noise compared to single-speed motors
- Two-stage heating and cooling allow precise temperature control without constant on-off cycling
- PVC exhaust compatibility simplifies venting in tight retrofit situations
- 10-year warranty with online registration covers compressor and parts adequately for this price point
- Energy Star certified system qualifies for some utility rebates, offsetting initial cost
Cons
- SEER 15 rating trails newer models hitting SEER 18+, meaning higher cooling costs over time
- 70.4 dB noise level runs louder than quieter premium units, noticeable in quiet settings
- Scroll compressor is reliable but two-stage design limits modulation compared to variable-capacity competitors
- Horizontal configuration limits placement options for some homes
Who Should Buy
Best For
Contractors installing replacements in attic or crawlspace applications where horizontal mounting makes sense, and homeowners seeking dependable mid-range efficiency without flagship pricing. Best for regions with moderate heating and cooling loads.
Consider Alternatives If
Anyone prioritizing cutting-edge efficiency ratings or minimal noise should explore SEER 17+ units with inverter compressors, even at higher cost.
Installation
Installation requires 208/230V single-phase 60Hz power and 21.8 to 35-amp breaker capacity, standard for most residential panels. The horizontal design suits attics and basements with adequate return air clearance. PVC/plastic exhaust venting simplifies ductwork in retrofit scenarios. Certified HVAC installers typically complete setup in 4-6 hours including evaporator coil pairing and system testing.
Warranty & Reliability
Goodman backs this system with 10 years parts and compressor coverage when registered online, a solid baseline protecting against manufacturing defects. This covers coil leaks, compressor failure, and motor issues but excludes wear items and installation errors. Registration is straightforward and recommended immediately after startup to activate full protection.
Specifications
| SKU | TX3N4 |
| Brand/Manufacturer | Goodman |
| Cooling BTU | 36,000 |
| Heating BTU | 120,000 |
| Refrigerant | R410A |
| Electrical | 208 / 230 V. 1 Phase 60 Hz |
| Warranty | 10 Years with Online Registration |
| Decibel Level (dBA) | 70.4 |
| Weight (in lbs) | 2.500000 |
| Feature | Spec |
| AHRI Certificate Number | 7368845 |
| Airflow Direction | Downflow/Horizontal |
| Exhaust Flue Requirement | Plastic / PVC |
| Product Features | Rebate Available |
| Furnace Efficiency / AFUE | 96% |
| Blower Motor | Variable Speed - ECM |
| Maximum CFM | 2000 |
| Configuration | Horizontal |
| Energy Star | Yes |
| Burner Stages | Two |
| Fuel Type | Propane, Natural Gas |
| Height | 24.5" |
| Width | 26" |
| Depth | 21.125" |
| Resources | CHPF Installation Manual CHPF 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. |
| SEER1 (Efficiency) | 16 |
| Condenser Stages | Two Stage |
| Compressor Type | Scroll |
| Liquid Valve Size | 3/8" |
| Suction Valve Size | 3/4" |
| Max Breaker Size | 35 amps |
| Min. Breaker Size | 21.8 amps |
| Tonnage | 5 Ton |
| Valve Type | Sweat |
| Liquid Line | 3/8" |
| Suction Line | 7/8" |
| Style | A-Coil |
Frequently Asked Questions
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