Review
Goodman's 3.5-ton downflow system represents a mainstream option in the budget-to-mid-range HVAC market. At $3,136, this package combines a 120,000 BTU furnace with a 42,000 BTU air conditioner in a single assembly, targeting homeowners and contractors who prioritize upfront cost savings. The downflow configuration serves a specific installation niche, particularly in basements and crawlspaces where upflow equipment won't fit. Online Supply's distribution of this Goodman unit keeps pricing competitive while maintaining factory backing.
Performance specifications read impressively on paper. The 16 SEER rating places this unit in the high-efficiency category for air cooling, while the 96% AFUE furnace heating efficiency is among the best available for gas equipment. The variable-speed ECM blower motor adjusts airflow between 0 and 2,000 CFM based on demand, improving comfort and reducing energy waste compared to fixed-speed designs. Two-stage burner operation lets the furnace run at reduced capacity during partial-load conditions, further optimizing efficiency. R410A and R22 compatibility broadens installation flexibility for both new construction and retrofit scenarios.
Pros & Cons
Pros
- 16 SEER cooling efficiency qualifies for ENERGY STAR with potential rebates, lowering net cost
- 96% AFUE furnace heating efficiency is excellent for natural gas or propane systems
- Variable-speed ECM blower motor provides better comfort and quieter operation than single-speed alternatives
- Two-stage burner allows low-fire operation during mild weather, improving efficiency and reducing cycling
- Scroll compressor technology is proven reliable with minimal maintenance requirements
- Flexible refrigerant compatibility with R410A or R22 for retrofit applications
Cons
- Tonnage mismatch in spec sheet shows 5-ton condenser paired with 3.5-ton rating, creating confusion and potential compatibility issues
- 73 dB noise level is moderate to high, noticeable during AC operation in quiet residential settings
- Single-stage compressor limits part-load efficiency compared to variable-capacity alternatives at higher price points
- Requires 40-amp maximum breaker, adding electrical upgrade costs in older homes with limited panel capacity
Who Should Buy
Best For
Contractors performing equipment replacements on tight budgets and homeowners in moderate climates where a 3.5-ton capacity matches their cooling load. This system works well for downflow or horizontal installations in basements or crawlspaces with adequate space for the 30-inch height.
Consider Alternatives If
Buyers in extreme climates needing true variable-capacity compressors, sound-sensitive installations in open-concept homes, or anyone uncomfortable with the conflicting tonnage specifications in the product documentation.
Installation
Installation requires standard HVAC practices with some caveats. The downflow orientation demands proper ducting below the unit and adequate clearance in the installation space. PVC exhaust piping is mandatory per spec, which simplifies venting compared to metal flue pipes. Electrical setup needs a 23.5 to 40-amp breaker at 115V, 1-phase, 60Hz. Refrigerant line sizing uses 3/8-inch liquid and 1 1/8-inch suction lines with 1/2-inch insulation, requiring precision during brazing.
Warranty & Reliability
The 10-year parts warranty with online registration is standard Goodman coverage and protects against compressor, component, and most mechanical failures. Registration is mandatory to activate full coverage, so buyers must complete this step immediately after purchase. This warranty provides moderate peace of mind but excludes labor costs, which vary by contractor. Extended protection plans are often available separately through the installer.
Specifications
| SKU | LS381183850 |
| Brand/Manufacturer | Online Supply |
| Cooling BTU | 42,000 |
| Heating BTU | 120,000 |
| Refrigerant | R410A or R22 |
| Electrical | 115 V. 1 Phase 60 Hz |
| Warranty | 10 Years with Online Registration |
| Decibel Level (dBA) | 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 | 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 | 1 1/8" |
| Style | A-Coil |
| Suction Line Insulation Thickness | 1/2" |
| Length | 50 feet |
Frequently Asked Questions
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