Review
The Goodman 3-ton upflow system occupies a practical middle ground in the residential HVAC market. This combination delivers both heating and cooling from a single compact package, measuring 34.5 inches tall by 21 inches wide, fitting most closets and utility spaces. Two-stage cooling and modulating gas heating represent mainstream efficiency choices backed by solid manufacturer support and contractor familiarity.
Performance numbers justify the efficiency claims. The furnace achieves 97% AFUE through condensing technology and modulating burner operation, reducing gas consumption during mild weather. The 35,000 BTU, 18 SEER2 condenser uses a scroll compressor and two-stage staging to handle load variations quietly. A variable-speed ECM blower adjusts to 1,600 CFM maximum, lowering electricity use during partial-load operation when the home needs less conditioning.
Pros & Cons
Pros
- 97% AFUE furnace efficiency reduces heating costs by 15-20% versus 80% AFUE systems
- 18 SEER2 condenser with two-stage design minimizes noise at 71 dB during partial load operation
- Modulating burner and variable-speed ECM blower optimize part-load performance year-round
- R410A refrigerant provides long-term compatibility and widespread service support
- Energy Star certified with 10-year parts warranty via online registration
Cons
- Spec sheet lists conflicting tonnage (3 ton system title versus 5 ton condenser), creating buyer confusion
- 18 SEER2 rating on condenser but no SEER2 rating disclosed for complete system
- 71 dB noise level acceptable but not among quietest two-stage units available
Who Should Buy
Best For
Homeowners replacing 10-15 year old equipment in moderate climates where utility rebates apply to 95%+ AFUE furnaces. Contractors installing in homes with existing ductwork and standard 115V service who prioritize reliability over cutting-edge efficiency.
Consider Alternatives If
Buyers seeking maximum efficiency should compare 98% AFUE models, and those in very cold climates may benefit from higher capacity units.
Installation
This upflow A-coil configuration suits basements, attics, and closets with vertical mounting. Supply lines require 3/8-inch liquid and 7/8-inch suction ports, standard for residential work. PVC exhaust venting allows direct vent through sidewalls without costly chimney modifications. Electrical service demands 115V single-phase 60 Hz with 21.3 to 35-amp breaker sizing, typical for homes with standard electrical panels.
Warranty & Reliability
Goodman covers parts for 10 years when registered online at purchase. This matches industry standard for mid-tier systems. Labor and refrigerant are not covered. Online registration is straightforward and extends protection, making this particularly valuable given the modulating components and variable-speed blower that benefit from coverage.
Specifications
| SKU | LS38783850 |
| Brand/Manufacturer | Online Supply |
| Cooling BTU | 35,000 |
| Heating BTU | 80,000 |
| Refrigerant | R410A |
| 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 | Two Stage Condenser |
| 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 | 34.5" |
| Width | 21" |
| Depth | 28.75" |
| Resources | Goodman Brochure Goodman Installations Instructions Goodman Parts Manual Goodman Service Manual Goodman Specifications Goodman Technical Information Goodman User Information Goodman 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. |
| Configuration | Upflow/Horizontal |
| Liquid Line | 3/8" |
| Suction Line | 7/8" |
| Style | A-Coil |
| 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 |
| Burner Stages | Modulating |
| Fuel Type | Propane, Natural Gas |
| Suction Line Insulation Thickness | 3/4" |
| Length | 50 feet |
Frequently Asked Questions
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