Review
Goodman has built a reputation for delivering competent HVAC equipment at prices that don't require taking out a second mortgage. This 3-ton upflow system sits squarely in that tradition. At $504, it represents one of the more aggressive price points we've seen for a complete gas furnace and air conditioner package with legitimate efficiency credentials. The SKU TX3N4 carries AHRI certification (7424268), confirming its performance claims are validated through independent testing rather than manufacturer estimates alone.
The heating side delivers 120,000 BTU with 97% AFUE, which means 97 cents of every fuel dollar converts to usable heat. The cooling capacity reaches 36,000 BTU with a 15 SEER rating and two-stage compressor operation. The modulating burner adjusts flame intensity continuously rather than simple on-off cycling, while the variable-speed ECM blower motor adapts CFM output from minimum to 2000 CFM depending on demand. These aren't premium-tier specifications, but they're legitimate efficiency features that justify the Energy Star designation.
Pros & Cons
Pros
- 97% AFUE furnace efficiency minimizes heating fuel waste, translating to meaningful savings on natural gas or propane bills
- Modulating burner automatically adjusts flame intensity rather than cycling on and off, reducing temperature swings and improving comfort
- Variable-speed ECM blower motor fine-tunes airflow to actual demand, which saves electricity compared to fixed-speed alternatives
- Two-stage cooling condenser provides efficient operation at partial load, important during shoulder seasons when full capacity isn't needed
- Energy Star certified system qualifies for utility rebates in many regions, offsetting initial purchase cost further
- 10-year parts warranty with online registration covers major components against manufacturing defects
Cons
- 15 SEER rating is solid but not cutting-edge, SEER2 specifications not provided making newer efficiency standards comparison difficult
- 70.4 dB noise level is average for this class, may be noticeable during compressor operation in quiet homes
- Right-side flue location limits installation flexibility in some homes with constrained wall layouts
Who Should Buy
Best For
Homeowners in moderate climates replacing 10+ year old systems who prioritize upfront affordability without sacrificing baseline efficiency. Contractors building rental portfolios or spec homes also appreciate the balance of features and cost.
Consider Alternatives If
Anyone in extreme climates needing maximum efficiency gains should consider higher SEER models, and homes requiring left-side flue venting need alternative configurations.
Installation
This upflow unit measures 30 inches high by 24.5 inches wide by 21 inches deep, fitting most standard closet installations. It requires 208/230V single-phase 60Hz power with a breaker between 21.8 and 35 amps. The plastic/PVC flue requirement simplifies venting compared to metal ductwork. Right-side flue location narrows placement options, so verify your wall layout before purchase. Standard refrigerant connections (3/8 inch liquid, 7/8 inch suction) use sweat valves for experienced installers.
Warranty & Reliability
Goodman extends a full 10-year parts warranty when you register the system online, covering the compressor, coil, and heat exchanger against manufacturing defects. This is standard coverage for this price tier, though not exceptional compared to competitors offering extended terms. Registration takes five minutes and is non-negotiable for claim eligibility.
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 | 7424268 |
| 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 |
| Configuration | Upflow / Downflow |
| Flue Location | Right |
| Energy Star | Yes |
| Burner Stages | Modulating |
| Fuel Type | Propane, Natural Gas |
| Height | 30" |
| Width | 24.5" |
| Depth | 21" |
| Resources | CAPF Installation Manual CAPF 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 | 3.5 Ton |
| Valve Type | Sweat |
| Liquid Line | 3/8" |
| Suction Line | 7/8" |
| Style | A-Coil |
Frequently Asked Questions
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