Review
The Goodman CAPT3743D4 is a conventional split-system combination furnace and air conditioner rated at 3 tons cooling and 3.5 tons heating capacity. At $3770, it sits squarely in the mid-market segment where contractors and homeowners expect solid performance without flagship pricing. This downflow configuration works well in closets, attics, or basement installations where horizontal or vertical discharge fits the layout. Goodman's reputation for straightforward engineering and parts availability makes this a familiar choice for replacement projects.
The furnace delivers 120,000 BTU of heating output at 96% AFUE, meaning only 4% of fuel energy is lost through the PVC exhaust. Cooling capacity reaches 36,000 BTU, and the condenser achieves 16 SEER1 efficiency using R410A refrigerant and a scroll compressor. Two-stage operation on both the burner and compressor reduces short-cycling and cycling losses. The variable-speed ECM blower motor adjusts output up to 2000 CFM, keeping noise reasonable at 70.4 dB while matching actual heating and cooling demand.
Pros & Cons
Pros
- 96% AFUE furnace converts nearly all fuel to usable heat, reducing natural gas or propane waste
- 16 SEER1 cooling efficiency qualifies for ENERGY STAR, supporting lower summer cooling costs
- Two-stage burner and two-stage compressor provide modulation for comfort and efficiency
- Variable-speed ECM blower motor adjusts CFM from quiet operation to 2000 CFM capacity
- PVC exhaust flue requirement simplifies venting in modern installations
- 10-year warranty with online registration covers parts and labor on both furnace and coil
Cons
- 16 SEER1 is mid-tier efficiency, not top-tier like 18+ SEER2 systems available at higher price points
- 70.4 dB noise level is acceptable but not the quietest option for noise-sensitive installations
- Scroll compressor is durable but less efficient than some newer variable-capacity designs
Who Should Buy
Best For
Homeowners replacing aging systems who want reliable performance at $3770 without overspending on premium efficiency. Contractors seeking proven Goodman equipment for mid-range residential projects in moderate climates.
Consider Alternatives If
Buyers in extreme climates or those prioritizing cutting-edge efficiency should explore 18+ SEER2 systems or variable-capacity compressors despite higher upfront costs.
Installation
This system arrives configured for downflow or horizontal discharge, simplifying field orientation. Suction and liquid lines measure 7/8 inches and 3/8 inches respectively, with sweat valve connections for standard brazing. Electrical demand runs 115V, 1-phase, 60 Hz, requiring a 21.8 to 35 amp breaker. PVC exhaust flue is required, eliminating costly metal venting. Most experienced HVAC technicians complete installation in one to two days.
Warranty & Reliability
Goodman includes a 10-year parts and labor warranty when you register online at no charge. This covers both the furnace and evaporator coil, providing meaningful protection against compressor failure or heat exchanger defects. The warranty does not cover normal maintenance, refrigerant losses from leaks beyond manufacturing defects, or damage from improper installation.
Specifications
| SKU | CAPT3743D4 |
| Brand/Manufacturer | Goodman |
| Cooling BTU | 36,000 |
| Heating BTU | 120,000 |
| Refrigerant | R410A |
| Electrical | 115 V. 1 Phase 60 Hz |
| Warranty | 10 Years with Online Registration |
| Decibel Level (dBA) | 70.4 |
| Weight (in lbs) | 75.000000 |
| Feature | Spec |
| Energy Star | Yes |
| 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 |
| Height | 30" |
| Width | 24.5" |
| Depth | 21" |
| Resources | CAPT Installation Manual CAPT 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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