Review
Goodman's horizontal furnace targets the contractor segment that installs in attics, basements, and tight utility closets where conventional upflow cabinets cannot fit. This 100,000 BTU unit delivers solid mid-range efficiency and dual-fuel flexibility at a direct-supply price point. The horizontal configuration with right-side flue exit suits retrofit applications where ductwork already runs horizontally. Energy Star certification and two-stage burner technology position this model competitively for homeowners upgrading aging 80% AFUE systems.
The 96% AFUE rating represents a meaningful jump in heating efficiency, translating to roughly 20-25% lower winter fuel bills than standard 80% units over a five-year span. The multi-speed ECM blower motor adjusts output between 600 and 1600 CFM based on heating demand, reducing overshooting and maintaining more consistent room temperatures. Two-stage burner operation runs at reduced capacity during mild weather, cutting short-cycle waste. However, spec sheets list both SEER 16 and a mismatched 3.5-ton cooling capacity alongside the 3-ton furnace designation, creating uncertainty about matched system sizing.
Pros & Cons
Pros
- 96% AFUE furnace efficiency reduces heating costs by approximately 20-25% compared to 80% AFUE baseline units
- Multi-speed ECM blower motor optimizes airflow across varying demand, improving comfort and reducing runtime
- Two-stage burner allows low-fire operation during mild days, cutting cycling and energy waste
- Plastic PVC flue compatibility simplifies venting in retrofit applications without masonry upgrades
- 10-year warranty with online registration provides solid coverage for parts and compressor peace of mind
- Compact horizontal configuration fits cramped attic, basement, and horizontal furnace closet installations
Cons
- 73.5 dB noise level runs louder than many premium models, noticeable in quiet homes during cycles
- 3.5-ton cooling capacity mismatches the furnace's 3-ton spec, creating sizing ambiguity for paired systems
- No pricing listed makes budget comparison impossible, and spec sheet lacks clarity on SEER2 vs. SEER1 rating
- R22 refrigerant option is becoming obsolete with EPA phase-out, limiting long-term serviceability
Who Should Buy
Best For
Contractors installing replacement systems in existing homes with horizontal ductwork runs or limited vertical space. Homeowners in moderate climates seeking efficient gas heating without premium pricing.
Consider Alternatives If
Anyone needing a matched 3-ton system should clarify the tonnage discrepancy before purchase. Buyers wanting whisper-quiet operation should evaluate higher-tier models.
Installation
Horizontal mounting requires secure bracket support on joists or beams to handle the 30-pound weight and vibration loads. PVC/plastic flue venting simplifies roof or wall termination without requiring expensive masonry work. The unit connects to standard 208/230V single-phase 60Hz electrical service with breaker sizing between 18.7 and 30 amps. Refrigerant lines come in 3/8-inch liquid and 7/8-inch suction sizes with 3/4-inch insulation, standard for residential coil pairs.
Warranty & Reliability
A 10-year parts and compressor warranty applies with online registration, a straightforward protection plan common among Goodman equipment. Online registration is required, so buyers must complete this step within the specified timeframe to activate coverage. The warranty covers manufacturing defects but excludes damage from improper installation or maintenance neglect. This coverage aligns with contractor expectations for mid-range residential furnaces.
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 |
| Airflow Direction | Upflow/Horizontal |
| Exhaust Flue Requirement | Plastic / PVC |
| Furnace Efficiency / AFUE | 96% |
| Blower Motor | Multi-Speed - ECM |
| Maximum CFM | 1600 |
| Configuration | Horizontal |
| Flue Location | Right |
| Energy Star | Yes |
| Burner Stages | Two |
| Fuel Type | 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 | 30 amps |
| Min. Breaker Size | 18.7 amps |
| Tonnage | 3.5 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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