Review
The Goodman CAPF3743D6 sits squarely in the sweet spot for residential HVAC systems: competent engineering at a builder-friendly price point. At $3640, this 3-ton combo pairs a gas furnace with an air conditioner in a single downflow unit, eliminating split-system complexity. Goodman's reputation leans practical rather than premium, and this system reflects that philosophy with solid core components and no unnecessary frills.
Performance numbers tell a straightforward story. The furnace delivers 120,000 BTU at 96% AFUE, meaning you lose only 4 cents per dollar to exhaust gas. Cooling produces 36,000 BTU with 15 SEER efficiency, dropping to approximately SEER2 12-13 under current testing. Two-stage burners and a variable-speed ECM blower running 2000 CFM maximum prevent overshooting temperature setpoints and reduce runtime waste. Energy Star certification confirms these numbers hold water in real-world operation.
Pros & Cons
Pros
- 96% AFUE furnace efficiency means lower heating bills and qualifies for Energy Star certification
- Two-stage burner and two-stage compressor provide consistent comfort and reduced short-cycling
- Variable-speed ECM blower motor optimizes airflow at 2000 CFM maximum, improving humidity control
- Downflow configuration works well for attics, basements, and compact spaces with flexible ductwork routing
- PVC exhaust compatibility simplifies installation and reduces corrosion risks versus metal flue pipes
Cons
- 15 SEER rating is solid but not premium, SEER2 equivalent likely closer to 12-13 under new testing standards
- 70.4 dB noise level runs slightly louder than high-end systems, noticeable in quiet bedrooms
- R22 refrigerant option phases out nationwide, forcing eventual upgrade costs for leak repairs
Who Should Buy
Best For
Homeowners replacing aging systems in moderate climates who want reliable heating and cooling without premium pricing. Contractors building spec homes or working on modest residential retrofits where budget constraints matter but quality cannot be compromised.
Consider Alternatives If
Anyone in extreme heat regions needing maximum cooling capacity or buyers in cold climates where a heat pump would deliver better efficiency and lower operating costs.
Installation
Downflow configuration requires careful ductwork planning below the unit, typically installed in attics or basements. PVC exhaust piping simplifies venting compared to metal alternatives and costs less. The 42-pound weight and compact footprint (30 inches tall, 24.5 inches wide, 21 inches deep) fit tight spaces well. Licensed technicians should handle refrigerant charge and electrical connections at 208/230V, 1 phase, 60 Hz, with breaker sizing between 21.8 and 35 amps.
Warranty & Reliability
Goodman provides 10-year parts coverage with online registration, a meaningful safety net for major component failures. This protects against compressor breakdown and heat exchanger cracking, your largest replacement costs. However, labor and Freon charges fall outside warranty, so plan $1500 to $2500 for emergency service calls. Evaporator coil carries separate warranty protection detailed in included documentation.
Specifications
| SKU | CAPF3743D6 |
| Brand/Manufacturer | Goodman |
| Cooling BTU | 36,000 |
| Heating BTU | 120,000 |
| Refrigerant | R410A or R22 |
| Electrical | 208 / 230 V. 1 Phase 60 Hz |
| Warranty | 10 Years with Online Registration |
| Decibel Level (dBA) | 70.4 |
| Weight (in lbs) | 42.000000 |
| 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 | Upflow / Downflow |
| Energy Star | Yes |
| Burner Stages | Two |
| 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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