Review
The Goodman CAPF3743C6 is a straightforward split system combining a 3-ton upflow furnace with matching air conditioning coil. Positioned in the value segment, this unit targets budget-conscious buyers and rental property managers who prioritize affordability over premium features. At $736, it undercuts many competitors while still meeting ENERGY STAR standards. The upflow configuration works well for basements and crawlspaces, making it a practical choice for retrofit installations across diverse home types.
This system delivers 100,000 BTU heating capacity at 80% AFUE, meaning it converts four dollars of fuel into three dollars of usable heat. On the cooling side, the 3-ton capacity produces 35,000 BTU/hour at 18 SEER, translating to solid summer efficiency. The two-stage burner and two-stage compressor reduce energy waste through modulation rather than running at full blast constantly. Variable-speed blower motor operation improves comfort while the 2000 CFM maximum airflow handles typical residential ductwork without strain.
Pros & Cons
Pros
- 80% AFUE heating efficiency with two-stage burner for better temperature control than single-stage competitors
- 18 SEER cooling rating and ENERGY STAR certification means lower utility bills in both seasons
- Variable-speed blower motor with 2000 CFM maximum airflow supports multiple zone configurations
- Two-stage compressor and condenser provides modulated cooling capacity, reducing short cycling
- 10-year warranty with online registration protects against major component failures
Cons
- 80% AFUE is acceptable but trails high-efficiency models running 95%+ AFUE, costing more to operate long-term
- Metal exhaust flue requirement adds installation complexity and cost compared to plastic vent options
- 71 dB noise level is moderate, louder than some quieter high-efficiency competitors
Who Should Buy
Best For
Homeowners in moderate climates replacing 10+ year old systems, or real estate investors building rental portfolios on tight budgets. Contractors pricing competitive jobs where upfront equipment cost drives customer decisions.
Consider Alternatives If
Anyone in extreme heating climates seeking maximum efficiency, or buyers unwilling to accept higher heating costs over a 15-year system lifespan.
Installation
This upflow unit measures 30 inches tall by 21 inches deep and wide, fitting most basement mechanical rooms with standard 7-foot ceilings. Metal exhaust flue requirement means routing a metal vent pipe to outside, adding roughly 2-3 hours of labor. Electrical needs 208/230V single-phase 60Hz service with 21.9 to 35-amp breaker capacity. Scroll compressor design is relatively durable and straightforward for HVAC technicians to service.
Warranty & Reliability
Goodman provides 10 years parts coverage when you register the system online within 60 days of installation. This covers the compressor, heat exchanger, and major components. Labor is not included, so factor service call costs into long-term ownership planning. Registration is simple and takes five minutes through Goodman's website.
Specifications
| SKU | CAPF3743C6 |
| Brand/Manufacturer | Goodman |
| Cooling BTU | 35,000 |
| Heating BTU | 100,000 |
| Refrigerant | R410A or R22 |
| Electrical | 208 / 230 V. 1 Phase 60 Hz |
| Warranty | 10 Years with Online Registration |
| Decibel Level (dBA) | 71 |
| Weight (in lbs) | 63.000000 |
| Feature | Spec |
| 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. |
| 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 | 30" |
| Width | 21" |
| Depth | 21" |
| Resources | CAPF Installation Manual CAPF Specifications Sheet Goodman Evaporator Coil Warranty You will need Adobe® Acrobat® Reader to view PDF documents. |
| 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 |
| Tonnage | 3.5 Ton |
| Valve Type | Sweat |
| Liquid Line | 3/8" |
| Suction Line | 7/8" |
| Style | A-Coil |
Frequently Asked Questions
Affiliate disclosure: IndustrialRank earns a commission on qualifying purchases at no extra cost to you. We only recommend products we have independently reviewed.