Review
The Goodman CAPF3743D6 represents a solid mid-market entry in the HVAC category, combining gas furnace and air conditioning in one downflow unit. At $3,640, it occupies the sweet spot where efficiency meets affordability, attracting homeowners replacing equipment from the 1990s and early 2000s. The system qualifies for Energy Star certification, which typically unlocks utility rebates that substantially reduce net cost. Goodman's market position relies on reliability without premium pricing, and this model follows that formula.
The furnace delivers 120,000 BTU heating output with 96% AFUE, meaning you're converting nearly all fuel to usable heat. The air conditioner provides 35,000 BTU cooling at 18 SEER1 efficiency, requiring a 3.5 ton capacity to cool 3 ton applications. Two-stage burners and a scroll compressor enable both units to modulate, reducing on-off cycling and improving comfort. The variable-speed ECM blower adjusts airflow from 0 to 2,000 CFM based on demand, avoiding the energy waste of fixed-speed motors.
Pros & Cons
Pros
- 18 SEER1 cooling efficiency with two-stage scroll compressor for quiet, modulated operation
- 96% AFUE heating with two-stage burner and ECM variable-speed blower for precise temperature control
- Energy Star certified with rebate availability, potentially offsetting initial $3,640 cost
- PVC exhaust compatible, simplifying installation in retrofit applications
- 10-year warranty with online registration covers compressor and components
Cons
- 71 dBA noise level runs louder than premium competitors, noticeable in quiet neighborhoods
- 3.5 ton capacity slightly oversized for typical 3 ton applications, causing minor cycling inefficiency
- Limited to R410A or R22 refrigerant, reducing flexibility as standards evolve
Who Should Buy
Best For
Homeowners in moderate climates looking to upgrade from older single-stage systems who prioritize upfront savings and rebate eligibility. Contractors installing in rental properties or value-focused residential projects will appreciate the balance of efficiency and affordability.
Consider Alternatives If
Buyers in ultra-quiet residential areas or those seeking premium brands should explore Carrier or Lennox alternatives, as the 71 dBA noise level may cause neighbor concerns.
Installation
Installation complexity is straightforward due to PVC exhaust compatibility, eliminating costly masonry chimney retrofits. The downflow configuration suits basements and mechanical rooms with tight spaces, requiring only 30 inches of height clearance. Electrical demands are modest at 115V single-phase 60Hz with a 21.9 to 35 amp breaker range. A licensed HVAC technician should handle refrigerant lines, ductwork connections, and gas line pressure testing.
Warranty & Reliability
The 10-year warranty covers compressor, coil, and components when registered online within 30 days of installation. This duration is competitive for Goodman products but shorter than some premium brands offering 12 or 15 years. Registration is straightforward and essential to activate coverage. Parts labor is not covered, so service calls incur technician fees beyond parts replacement.
Specifications
| SKU | CAPF3743D6 |
| Brand/Manufacturer | Goodman |
| Cooling BTU | 35,000 |
| Heating BTU | 120,000 |
| Refrigerant | R410A or R22 |
| Electrical | 115 V. 1 Phase 60 Hz |
| Warranty | 10 Years with Online Registration |
| Decibel Level (dBA) | 71 |
| Weight (in lbs) | 42.000000 |
| Feature | Spec |
| 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 |
| 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. |
| 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 |
| Burner Stages | Two |
| Fuel Type | Propane, Natural Gas |
| Liquid Line | 3/8" |
| Suction Line | 7/8" |
| Style | A-Coil |
Frequently Asked Questions
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