Review
The Goodman 3 Ton CAPF3743D6 represents mainstream HVAC equipment, positioning itself as a practical middle ground between budget bare-bones systems and premium high-efficiency units. At $2,575, this combination furnace and air conditioner appeals to contractors managing multiple retrofits and homeowners replacing aging equipment. Goodman's reputation for reliability in the mid-market segment means this unit shows up on job sites regularly, backed by proven field performance rather than cutting-edge technology.
Performance specs tell a straightforward story. The furnace delivers 80,000 BTU heating capacity at 80% AFUE, meaning 20% of fuel energy goes up the flue as waste. On cooling, the unit produces 35,000 BTU with 18 SEER2 rating and two-stage capacity control. The variable-speed blower motor adjusts output between 0 and 2,000 CFM depending on demand, reducing short-cycling and improving temperature consistency compared to fixed-speed alternatives. Two-stage burner heating matches better with variable cooling, though neither reaches premium efficiency territory.
Pros & Cons
Pros
- 18 SEER2 cooling efficiency qualifies for Energy Star with two-stage compressor for variable cooling
- 80,000 BTU heating output handles most single-family homes with solid 80% AFUE furnace efficiency
- Variable-speed blower motor provides consistent comfort and better air distribution than single-speed alternatives
- Dual-stage burner offers more precise heating control and reduced cycling compared to single-stage units
- 10-year warranty with online registration covers parts and compressor, standard for this price tier
Cons
- 80% AFUE is mid-range; homes in harsh winters will see higher heating bills than 95%+ AFUE models
- 18 SEER2 lags behind premium systems (20+ SEER2), meaning higher cooling costs in hot climates
- Scroll compressor is durable but less efficient than newer rotary designs in some conditions
Who Should Buy
Best For
Contractors seeking reliable mid-market equipment for retrofit jobs and homeowners replacing 10+ year old systems who value reasonable efficiency without breaking the budget. This works well in moderate climates where heating and cooling loads are balanced.
Consider Alternatives If
Homeowners in extremely cold climates or with high cooling demands should consider 95%+ AFUE furnaces and 20+ SEER2 units, despite higher upfront cost.
Installation
Standard upflow/horizontal configuration fits most furnace closets and basements with 30 inch height, 24.5 inch width, 21 inch depth. Unit requires 208/230V single-phase 60 Hz power with 21.9 to 35 amp breaker capacity. Metal exhaust flue is mandatory for venting. A-coil design with 3/8 inch liquid and 7/8 inch suction lines pairs with compatible outdoor condensers. Installation typically requires certified HVAC technician for refrigerant handling and system commissioning.
Warranty & Reliability
Goodman covers parts and compressor for 10 years when registered online after purchase. This standard protection matches competitor offerings at this price point. Registration process is straightforward and typically handled during installation. Coverage excludes wear items, misinstallation, and improper maintenance. Most failures occur within first 2-3 years, giving solid protection during critical early operation period.
Specifications
| SKU | CAPF3743D6 |
| Brand/Manufacturer | Goodman |
| Cooling BTU | 35,000 |
| Heating BTU | 80,000 |
| 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) | 42.000000 |
| 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. |
| AHRI Certificate Number | 204633307 |
| 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 | 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. |
| 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
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