Review
The Goodman 3-ton horizontal gas furnace ranks among the better mid-tier options for residential heating and cooling. Rated at 97% AFUE with 120,000 BTU heating output, it combines efficient combustion with a variable-speed blower motor that adapts to real-time demand. The horizontal configuration (24.5 inches tall, 26 inches wide, 21.125 inches deep) solves installation challenges in tight attics or basement crawlspaces where standard upflow units won't fit. Goodman's reputation for solid build quality and the 10-year warranty make this a practical choice for contractors and budget-conscious homeowners.
Performance data tells the real story. The 97% AFUE rating means nearly all fuel converts to usable heat, translating to lower monthly gas bills versus standard 80-90% units. The modulating burner operates at multiple flame levels rather than simple on-off cycling, cutting temperature overshooting and short-cycling. On cooling, 34,800 BTU output with a scroll compressor delivers 16 SEER1 efficiency, adequate for many climates though not exceptional. The variable-speed blower motor ramps from idle to 2,000 CFM based on heating and cooling load, improving system responsiveness and reducing cycling losses.
Pros & Cons
Pros
- 97% AFUE furnace efficiency minimizes fuel waste and monthly heating bills on natural gas or propane
- Modulating burner adjusts flame output in real time rather than cycling on/off, reducing temperature swings
- Variable-speed ECM blower motor ramps up or down based on demand, improving comfort and reducing energy use
- ENERGY STAR certified with 10-year warranty including online registration
- Horizontal configuration (24.5 inches tall, 26 inches wide) fits tight attic or basement installations
Cons
- Cooling efficiency is 16 SEER1, which is solid but not ultra-high tier like 18+ SEER systems
- Single-stage condenser means the AC unit runs at full capacity or off, with no intermediate cooling levels
- 73.5 dB noise level is moderately loud, noticeable during operation in finished spaces
Who Should Buy
Best For
Contractors replacing worn furnaces in existing homes with space constraints, and homeowners in moderate to cold climates who prioritize heating efficiency and comfort control. The modulating burner works especially well for variable outdoor temperatures.
Consider Alternatives If
Anyone seeking premium cooling efficiency above 18 SEER, or homes with sound-sensitive zones where low-noise operation is critical.
Installation
This furnace requires 208/230V single-phase power with a minimum 18.7-amp breaker and maximum 30-amp breaker size, making it compatible with standard residential electrical service. It uses plastic or PVC flue exhaust, simplifying venting through exterior walls. The horizontal design requires proper condensate drain routing. Professional installation is strongly recommended to verify refrigerant charge, airflow, and gas line pressure, especially when converting from older equipment.
Warranty & Reliability
Goodman provides a 10-year parts warranty when registered online after installation, covering both furnace and evaporator coil components. This warranty protects against manufacturing defects and premature compressor failure. Extended labor coverage is not included, so repair costs beyond parts depend on local service rates. Registration is simple but mandatory to activate full coverage.
Specifications
| SKU | LS38783850 |
| Brand/Manufacturer | Online Supply |
| Cooling BTU | 34,800 |
| Heating BTU | 120,000 |
| 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 |
| AHRI Certificate Number | 7424268 |
| Airflow Direction | Upflow/Horizontal |
| Exhaust Flue Requirement | Plastic / PVC |
| Product Features | Rebate Available |
| Furnace Efficiency / AFUE | 97% |
| Blower Motor | Variable Speed - ECM |
| Maximum CFM | 2000 |
| Configuration | Horizontal |
| Flue Location | Right |
| Energy Star | Yes |
| Burner Stages | Modulating |
| Fuel Type | Propane, Natural Gas |
| Height | 24.5" |
| Width | 26" |
| Depth | 21.125" |
| Resources | CHPF Installation Manual CHPF 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. |
| 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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