Review
The Goodman 3-ton gas furnace and air conditioner system represents the practical middle ground for residential HVAC replacement. With 100,000 BTU heating capacity and 36,000 BTU cooling output, this upflow unit fits typical single-story homes and smaller two-story properties. Goodman has built a solid reputation for straightforward, maintainable equipment that contractors appreciate and homeowners trust. This SKU arrives ready for upflow or horizontal mounting, making it adaptable to most installation scenarios.
Performance specs align with mid-market expectations. The 80% AFUE furnace efficiency converts fuel to usable heat predictably, though condensing models achieve 95%+ efficiency if operating costs matter most. The 14 SEER air conditioner delivers reliable cooling without ENERGY STAR designation, reflecting its standard rather than premium positioning. Variable-speed blower technology pulls 2000 CFM maximum, allowing the system to match capacity to actual household demand instead of running full-blast constantly. Two-stage burner operation reduces heating overshoots and improves comfort.
Pros & Cons
Pros
- 80% AFUE furnace efficiency is respectable for non-condensing units, keeping heating costs moderate
- 14 SEER cooling delivers solid AC performance at 36,000 BTU output for efficient summer operation
- Variable speed blower motor adapts to load conditions, improving comfort and reducing runtime electricity use
- Two-stage burner provides heating flexibility, avoiding constant on-off cycling
- Lightweight at 35 lbs with standard 3/8 inch and 3/4 inch line sizes, simplifying installation logistics
- 10-year warranty with online registration covers manufacturing defects and gives reasonable peace of mind
Cons
- No ENERGY STAR certification means it misses top efficiency tiers that can reduce long-term operating costs
- Single-stage cooling compressor cannot modulate capacity, leading to less precise temperature control than variable-capacity units
- 73 dB noise level runs louder than premium models, potentially noticeable during heating cycles
- 80% AFUE is adequate but trails high-efficiency condensing furnaces that reach 95%+ efficiency
Who Should Buy
Best For
Budget-conscious homeowners replacing 10-15 year old systems in moderate climates who want proven Goodman reliability without premium pricing. This works well for properties where the furnace lives in a garage or utility closet rather than occupied spaces.
Consider Alternatives If
Homeowners in extreme climates, those seeking maximum energy savings through ENERGY STAR equipment, or anyone prioritizing ultra-quiet operation should explore condensing furnaces and variable-capacity systems.
Installation
This unit requires standard HVAC installation skills and common tools. The 35-pound weight moves easily, while 3/8 inch liquid and 3/4 inch suction lines use industry-standard sizes that most contractors stock. Upflow configuration suits basement or utility closet placement. Metal exhaust flue is mandatory for the gas furnace. Electrical requirements are modest, needing 18.7 to 30 amp breaker capacity on standard 120V single-phase service. Professional installation is strongly recommended.
Warranty & Reliability
Goodman covers this system for 10 years against manufacturing defects when registered online. This represents solid protection but trails extended warranties some competitors offer. Coverage applies to sealed compressor, heat exchanger, and cabinet components. Registration is required within 60 days of installation. Labor and refrigerant are typically not covered under standard warranty terms, so confirm coverage details with your installer.
Specifications
| SKU | LS38343830 |
| Brand/Manufacturer | Online Supply |
| Cooling BTU | 36,000 |
| Heating BTU | 100,000 |
| Refrigerant | R410A |
| Electrical | 120 V. 1 Phase 60 Hz |
| Warranty | 10 Years with Online Registration |
| Decibel Level (dBA) | 73 |
| Weight (in lbs) | 35.000000 |
| Feature | Spec |
| Energy Star | No |
| SEER1 (Efficiency) | 14 |
| Condenser Stages | Single Stage |
| Compressor Type | Scroll |
| Liquid Line | 3/8" |
| Suction Line | 3/4" |
| Liquid Valve Size | 3/8" |
| Suction Valve Size | 3/4" |
| Max Breaker Size | 30 Amps |
| Min. Breaker Size | 18.7 Amps |
| Tonnage | 3.5 Ton |
| Height | 34.5" |
| Width | 21" |
| Depth | 28.75" |
| Resources | Goodman Brochure Goodman Installation Instructions Goodman Parts Manual Goodman Service Manual 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 |
| Style | A-Coil |
| Airflow Direction | Upflow/Horizontal |
| Exhaust Flue Requirement | Metal |
| Furnace Efficiency / AFUE | 80% |
| Blower Motor | Variable Speed |
| Maximum CFM | 2000 |
| Burner Stages | Two |
| Fuel Type | Propane, Natural Gas |
| Suction Line Insulation Thickness | 3/4" |
| Length | 30 feet |
Frequently Asked Questions
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