Review
Goodman's 3.5 ton combination system pairs a modulating gas furnace with a single-stage air conditioner in one compact A-coil package. At 30 inches tall and 21 inches deep, it fits standard upflow and horizontal configurations. The unit ships through Online Supply with AHRI certification 7424266, confirming matched component performance. This is a solid mid-market choice for contractors and DIY installers seeking balanced performance without premium pricing.
The furnace delivers 80,000 BTU at 97% AFUE, while the AC section produces 42,000 cooling BTU with a 16 SEER rating. The modulating burner adjusts heat output to match demand, avoiding the energy waste of single-stage units that run at full blast. The variable-speed ECM blower motor adjusts to 1600 CFM maximum, improving both comfort and dehumidification. Electrical requirements are straightforward: 115V single-phase 60 Hz, drawing 23.5 to 40 amps.
Pros & Cons
Pros
- Modulating burner stages adapt to heating demand, reducing short-cycling and energy waste
- 97% AFUE furnace efficiency exceeds most standard units on the market today
- 16 SEER cooling rating beats the 15 SEER specification, indicating strong AC performance
- Variable-speed ECM blower motor improves comfort and humidity control with 1600 CFM maximum
- Energy Star certified with 10-year warranty when registered online
- Single-stage scroll compressor is proven reliable in residential applications
Cons
- Single-stage cooling means AC runs at full capacity rather than adjusting to seasonal load, wasting energy in mild weather
- 73 dB noise level is moderately loud for a residential unit, noticeable in quiet neighborhoods
- R410A or R22 refrigerant compatibility requires clear documentation to avoid field mistakes during installation
Who Should Buy
Best For
Homeowners in mixed climates who heat and cool throughout the year and want efficiency without two-stage equipment costs. This system makes sense for those replacing older 80s-era equipment where the furnace gets regular winter use.
Consider Alternatives If
Buyers in consistently cold regions should prioritize heating capacity, and those in hot climates wanting quiet operation or variable cooling should evaluate two-stage AC units instead.
Installation
Installation requires proper refrigerant line sizing. Use 3/8 inch liquid lines and 1 1/8 inch suction lines with 1/2 inch insulation thickness (pre-sized for 50 feet). PVC or plastic exhaust venting is required. Both natural gas and propane configurations are supported. Proper ductwork sealing and return air sizing are critical for achieving rated efficiency. Most contractors complete installation in one day with standard tools.
Warranty & Reliability
Goodman provides 10 years of parts coverage when you register the unit online. This is competitive for mid-tier equipment and covers compressor, heat exchanger, and major components. Labor and refrigerant are not included, so budget separately for service calls. Registration is mandatory, so complete paperwork at installation.
Specifications
| SKU | LS381183850 |
| Brand/Manufacturer | Online Supply |
| Cooling BTU | 42,000 |
| Heating BTU | 80,000 |
| Refrigerant | R410A or R22 |
| Electrical | 115 V. 1 Phase 60 Hz |
| Warranty | 10 Years with Online Registration |
| Decibel Level (dBA) | 73 |
| Weight (in lbs) | 48.000000 |
| Feature | Spec |
| Energy Star | Yes |
| SEER1 (Efficiency) | 16 |
| Condenser Stages | Single Stage |
| Compressor Type | Scroll |
| Liquid Valve Size | 3/8" |
| Suction Valve Size | 7/8" |
| Max Breaker Size | 40 amps |
| Min. Breaker Size | 23.5 amps |
| Tonnage | 5 Ton |
| 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. |
| 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 | 7424266 |
| Airflow Direction | Upflow/Horizontal |
| Exhaust Flue Requirement | Plastic / PVC |
| Furnace Efficiency / AFUE | 97% |
| Blower Motor | Variable Speed - ECM |
| Maximum CFM | 1600 |
| Configuration | Upflow / Downflow |
| Burner Stages | Modulating |
| Fuel Type | Propane, Natural Gas |
| Liquid Line | 3/8" |
| Suction Line | 1 1/8" |
| Style | A-Coil |
| Suction Line Insulation Thickness | 1/2" |
| Length | 50 feet |
Frequently Asked Questions
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