Review
The Goodman CAPF3743D6 sits squarely in the contractor's sweet spot: affordable, reasonably efficient, and straightforward to install. At $504, this 3-ton upflow system combines a 120,000 BTU furnace with a 36,000 BTU air conditioning coil in a compact 30-inch height that fits most closets and basements. Goodman's reputation for durability and parts availability makes this a practical choice for budget-conscious homeowners and rental property managers who need solid performance without premium pricing.
Performance specs reveal a well-balanced system. The furnace delivers 96% AFUE efficiency, meaning 96 cents of every heating dollar goes into your home versus 80% on older units. The air conditioner operates at 15-16 SEER with two-stage cooling, allowing the unit to modulate output rather than cycling on and off constantly. The variable-speed ECM blower motor caps noise at 70.4 dBA and adjusts CFM up to 2000 based on heating or cooling demand, reducing wasted energy during partial-load operation.
Pros & Cons
Pros
- 96% AFUE furnace efficiency cuts heating costs by 15-20% compared to 80% AFUE systems
- Variable-speed ECM blower motor reduces runtime noise to 70.4 dBA and improves comfort consistency
- Two-stage burner and condenser allow modulating operation for better part-load efficiency
- PVC/plastic flue exhaust simplifies venting and installation costs versus rigid metal
- Energy Star certified with rebate eligibility, offsetting initial purchase price
Cons
- Advertised as 3 ton but specs show 3.5 ton tonnage, creating potential oversizing in mild climates
- R22 refrigerant option complicates future servicing as EPA phases out this refrigerant
- SEER rating listed as 16 conflicts with headline 15 SEER claim, raising accuracy concerns
Who Should Buy
Best For
Homeowners in moderate climates seeking reliable heating without premium pricing, or contractors installing equipment in rental properties where durability and efficiency matter equally. This system delivers good value for replacement jobs in upflow installations where space constraints demand compact designs.
Consider Alternatives If
Buyers in hot climates needing maximum cooling capacity should look at higher-tonnage units, and those wanting cutting-edge efficiency should prioritize SEER2 ratings over legacy SEER metrics.
Installation
Installation favors contractors familiar with modern equipment. The upflow configuration with horizontal capability fits standard furnace closets and attics. The unit requires 208/230V single-phase 60Hz power with breaker capacity between 21.8 and 35 amps, making it compatible with most residential panels. PVC flue venting eliminates metal ductwork expenses. Sweat-type refrigerant connections and standard line sizes (3/8-inch liquid, 7/8-inch suction) use common tools, reducing labor complexity.
Warranty & Reliability
Goodman covers this system with a 10-year parts warranty upon online registration, a solid middle-ground commitment. The evaporator coil carries separate coverage. This protects against compressor or heat exchanger failure but doesn't cover labor, refrigerant, or damage from improper installation. Registration is mandatory and takes five minutes online, so factor that into your purchasing process.
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 | 7368842 |
| Airflow Direction | Upflow/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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