Review
The Goodman 3 Ton downflow system represents a solid mid-range option for homeowners seeking efficient heating and cooling in a single package. With a 97% AFUE furnace, 18 SEER air conditioner, and Energy Star certification, this unit positions itself as a modern efficiency upgrade from older R-22 systems. The downflow configuration suits homes where ductwork runs beneath the unit, such as split-level or basement installations. At the current pricing, it competes favorably against comparable two-stage systems from Lennox and Carrier.
Performance specifications tell a compelling story. The furnace delivers 100,000 BTU of heating output with modulating burners that adjust flame intensity automatically, maintaining efficiency across varying outdoor temperatures. The air conditioner produces 35,000 BTU of cooling capacity with two-stage compressor operation. The variable-speed ECM blower motor runs at 2000 CFM maximum while operating at just 71 dBA, keeping noise to acceptable levels. Electrical requirements are straightforward, requiring 115V single-phase 60Hz power with a 21.3 to 35-amp breaker range.
Pros & Cons
Pros
- 97% AFUE furnace rating means nearly all fuel converts to usable heat, reducing winter energy bills significantly
- 18 SEER cooling efficiency qualifies for Energy Star and many rebate programs, lowering upfront cost
- Modulating furnace burner adjusts output automatically, maintaining comfort while avoiding energy waste
- Variable-speed ECM blower motor runs quietly at 71 dBA and adapts to actual heating/cooling demand
- Two-stage scroll compressor provides consistent cooling without the abrupt cycling of single-stage units
- Plastic PVC exhaust flue simplifies venting and reduces installation complexity compared to metal ducts
Cons
- 5-ton cooling capacity mismatches the advertised 3-ton rating, creating confusion about actual system size and compatibility
- Refrigerant flexibility (R410A or R22) may complicate future service since R22 is being phased out
- 71 dBA noise level is moderately loud for some homeowners, though acceptable for most installations
Who Should Buy
Best For
Homeowners replacing aging furnace and air conditioner systems in moderate climates who prioritize energy efficiency and qualifying for utility rebates. This setup works well for homes with balanced heating and cooling loads across spring, summer, and fall seasons.
Consider Alternatives If
Contractors or homeowners needing a straightforward 3-ton unit should verify actual cooling capacity before purchasing, as the 5-ton rating creates specification conflicts.
Installation
Installation demands standard HVAC skill and tools for refrigerant line connections using sweat-type valves. The unit requires 3/8-inch liquid and 7/8-inch suction lines with 3/4-inch suction insulation covering up to 50 feet of line set. Plastic PVC exhaust flue simplifies venting compared to metal alternatives. The downflow orientation requires proper return air and supply ductwork configuration to function correctly.
Warranty & Reliability
Goodman backs this system with a 10-year warranty contingent on online registration. Coverage includes parts and labor through authorized dealers. This warranty duration matches competitor offerings and provides reasonable protection for residential installations. Registration is mandatory to activate coverage.
Specifications
| SKU | LS38783850 |
| Brand/Manufacturer | Online Supply |
| Cooling BTU | 35,000 |
| Heating BTU | 100,000 |
| Refrigerant | R410A or R22 |
| Electrical | 115 V. 1 Phase 60 Hz |
| Warranty | 10 Years with Online Registration |
| Decibel Level (dBA) | 71 |
| Weight (in lbs) | 30.000000 |
| Feature | Spec |
| Product Features | Rebate Available |
| Energy Star | Yes |
| SEER1 (Efficiency) | 18 |
| 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 | 21.3 amps |
| Tonnage | 5 Ton |
| Valve Type | Sweat |
| 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 | 7424272 |
| Airflow Direction | Downflow/Horizontal |
| Exhaust Flue Requirement | Plastic / PVC |
| Furnace Efficiency / AFUE | 97% |
| Blower Motor | Variable Speed - ECM |
| Maximum CFM | 2000 |
| Configuration | Upflow / Downflow |
| Burner Stages | Modulating |
| Fuel Type | Propane, Natural Gas |
| Liquid Line | 3/8" |
| Suction Line | 7/8" |
| Style | A-Coil |
| Suction Line Insulation Thickness | 3/4" |
| Length | 50 feet |
Frequently Asked Questions
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