Review
The Goodman 3-ton downflow system represents the practical middle ground in residential HVAC replacement. Priced at just $89, it targets budget-conscious homeowners and contractors seeking reliability without luxury pricing. This unit combines a furnace section with an air conditioning coil in a compact 30 by 21 by 21 inch footprint, designed specifically for attic or basement installations where vertical space is limited. The downflow configuration makes it particularly useful in homes with crawl spaces or slab foundations.
Performance specs tell a solid story for this class of equipment. The furnace delivers 100,000 BTU heating output at 96% AFUE, meaning minimal gas waste during winter operation. On the cooling side, expect 34,800 BTU output at 16 SEER efficiency, sufficient for moderate climates but not aggressive enough for extreme heat regions. The variable-speed ECM blower and two-stage burner provide better efficiency than single-stage competitors, while the R410A/R22 refrigerant flexibility allows technicians to work with existing line sets.
Pros & Cons
Pros
- 96% AFUE heating efficiency exceeds most residential furnaces, reducing winter gas bills
- 16 SEER cooling rating with scroll compressor provides solid air conditioning performance for 3-ton applications
- Variable-speed ECM blower motor adjusts to actual heating/cooling needs, improving comfort and efficiency
- Two-stage burner reduces short-cycling and improves temperature stability throughout the heating season
- PVC exhaust flue compatibility allows easier, more flexible ductwork routing compared to metal requirements
- ENERGY STAR certified system qualifies for utility rebates that can offset purchase price
Cons
- 73.5 dB noise level is moderately loud, noticeable during operation in finished spaces near the unit
- 5-ton tonnage rating appears mismatched to 3-ton system design, creating specification confusion
- Single-stage condenser limits cooling modulation during mild weather, reducing part-load efficiency
- Online Supply manufacturer is a third-party distributor, not original Goodman, which may complicate warranty claims
Who Should Buy
Best For
This system suits homeowners in moderate climates replacing 15+ year old equipment who prioritize upfront affordability and solid baseline efficiency. Contractors bidding residential retrofit jobs where customers resist premium pricing will appreciate the value proposition.
Consider Alternatives If
Skip this if you need premium sound levels below 70 dB, live in extreme climates demanding modulating capacity, or require nationwide factory support directly from Goodman.
Installation
This downflow unit requires standard PVC exhaust venting, which simplifies installation compared to metal-only requirements. The 30-inch height fits most attic spaces, though techs must verify 21-inch width clearance. Electrical connection needs a dedicated 18.7 to 30-amp breaker at 208/230V single-phase. Standard R-410A lineset sizing applies with 3/8-inch liquid and 7/8-inch suction lines, pre-insulated to 3/4-inch thickness. Plan 2 to 4 hours for experienced installers.
Warranty & Reliability
Goodman backs this unit with a 10-year parts warranty when registered online within 60 days of purchase. Registration is straightforward but mandatory for full coverage. This warranty covers compressor, heat exchanger, and major components. Labor coverage typically runs 1 year, so confirm extended labor warranty options with your installer before signing the contract.
Specifications
| SKU | LS38783850 |
| Brand/Manufacturer | Online Supply |
| Cooling BTU | 34,800 |
| Heating BTU | 100,000 |
| Refrigerant | R410A or R22 |
| Electrical | 208 / 230 V. 1 Phase 60 Hz |
| Warranty | 10 Years with Online Registration |
| Decibel Level (dBA) | 73.5 |
| Weight (in lbs) | 30.000000 |
| 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 | 7368844 |
| 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 |
| Energy Star | Yes |
| Burner Stages | Two |
| Fuel Type | Propane, Natural Gas |
| 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. |
| SEER1 (Efficiency) | 16 |
| Condenser Stages | Single Stage |
| Compressor Type | Scroll |
| Liquid Valve Size | 3/8" |
| Suction Valve Size | 7/8" |
| Max Breaker Size | 30 amps |
| Min. Breaker Size | 18.7 amps |
| Tonnage | 5 Ton |
| 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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