Review
Goodman's 3.5-ton horizontal furnace and AC system targets the mid-market contractor and homeowner looking for straightforward, dependable comfort without premium pricing. This unit pairs a high-efficiency 80,000 BTU furnace with a 42,000 BTU cooling coil in a compact form factor. The horizontal configuration addresses a real installation pain point, fitting spaces where traditional vertical units simply do not work. Online Supply positions this as a practical upgrade from legacy equipment, backed by Energy Star certification.
The 97% AFUE rating is the standout heating spec, meaning only 3% of fuel energy escapes as waste. For cooling, the 16 SEER2 efficiency (converted from the 15 SEER label) handles moderate loads competently across 1600 CFM maximum airflow. The modulating furnace and variable-speed ECM blower work in tandem to reduce cycling losses and adapt to part-load conditions. At 48 pounds and running on 208/230V single-phase power, installation requires no special electrical upgrades in most homes. The scroll compressor and R410A refrigerant are industry standards, ensuring technician familiarity.
Pros & Cons
Pros
- 97% AFUE furnace efficiency means you recover nearly all fuel energy as usable heat, reducing heating costs significantly
- 16 SEER2 cooling efficiency (translates from 15 SEER rating) qualifies for Energy Star certification and available rebates
- Modulating burner stages automatically adjust output to match demand, avoiding the on-off cycling waste of single-stage units
- Variable-speed ECM blower adapts airflow from 0 to 1600 CFM, improving comfort and reducing noise versus fixed-speed motors
- PVC/plastic flue compatibility simplifies venting and reduces installation costs compared to metal ductwork requirements
- Compact horizontal design, 21 inches tall and 26 inches deep, fits tight spaces like attics, crawlspaces, or utility closets
Cons
- Single-stage condenser limits cooling capacity adjustment, meaning the AC runs at full capacity even during mild days
- 73 dBA noise level is moderate to high, noticeable in quiet rooms during heating cycles
- R410A refrigerant phaseout means servicing costs may rise over the system's lifespan as supplies tighten
Who Should Buy
Best For
Contractors installing systems in homes with space constraints and homeowners replacing 10+ year-old furnaces who prioritize heating efficiency. This unit works especially well for mixed climates where heating outpaces cooling throughout the year.
Consider Alternatives If
Buyers in hot climates needing aggressive cooling or those who prioritize quiet operation should explore two-stage condenser options or higher SEER2 units with variable-capacity compressors.
Installation
This horizontal unit requires right-side flue placement and PVC/plastic exhaust venting, simplifying ductwork compared to metal requirements. The compact 21 by 26-inch footprint fits standard attic or crawlspace openings. Electrical connection demands 23.5 to 40 amp breaker capacity. Refrigerant line sizing calls for 3/8-inch liquid and 1 1/8-inch suction lines with 1/2-inch insulation thickness, standard for 3.5-ton systems.
Warranty & Reliability
Goodman provides 10 years of coverage with online registration, a solid baseline that requires minimal paperwork. This protects against defects in compressor, coil, and blower components. The evaporator coil carries separate extended warranty protection. Registration is essential, as unregistered units default to shorter coverage periods, so complete this step immediately after installation.
Specifications
| SKU | LS381183850 |
| Brand/Manufacturer | Online Supply |
| Cooling BTU | 42,000 |
| Heating BTU | 80,000 |
| Refrigerant | R410A |
| Electrical | 208 / 230 V. 1 Phase 60 Hz |
| Warranty | 10 Years with Online Registration |
| Decibel Level (dBA) | 73 |
| Weight (in lbs) | 48.000000 |
| Feature | Spec |
| AHRI Certificate Number | 7424271 |
| Airflow Direction | Downflow/Horizontal |
| Exhaust Flue Requirement | Plastic / PVC |
| Product Features | Rebate Available |
| Furnace Efficiency / AFUE | 97% |
| Blower Motor | Variable Speed - ECM |
| Maximum CFM | 1600 |
| Configuration | Horizontal |
| Flue Location | Right |
| Energy Star | Yes |
| Burner Stages | Modulating |
| Fuel Type | Propane, Natural Gas |
| Height | 21" |
| Width | 21.125" |
| Depth | 26" |
| 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 | 40 amps |
| Min. Breaker Size | 23.5 amps |
| Tonnage | 3.5 Ton |
| Liquid Line | 3/8" |
| Suction Line | 1 1/8" |
| Style | A-Coil |
| Suction Line Insulation Thickness | 1/2" |
| Length | 50 feet |
Frequently Asked Questions
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