Review
Goodman's 3.5-ton gas furnace and AC combo represents the practical middle ground in residential HVAC systems. This downflow configuration paired with a 100,000 BTU furnace and 42,000 BTU air conditioner handles typical three to four-bedroom homes effectively. It's the kind of equipment contractors reach for when budget is the primary driver, yet basic performance standards still need meeting.
The 80% AFUE heating efficiency and 14 SEER cooling rating deliver adequate performance for moderate climates and average usage patterns. The two-stage gas burner modulates output for more consistent comfort than single-stage designs, while the multi-speed blower motor can ramp CFM from lower speeds up to 2000 maximum. However, these specs trail modern 95% AFUE furnaces and 16+ SEER systems by meaningful margins in energy consumption and long-term operating costs.
Pros & Cons
Pros
- Two-stage burner provides flexible heating and better comfort than single-stage alternatives
- 14 SEER cooling efficiency balances performance with affordability for most climates
- Multi-speed blower motor allows customized airflow and quieter operation than fixed-speed units
- Downflow configuration fits tight installations where upflow isn't possible
- 10-year warranty with online registration offers decent coverage for the price point
Cons
- 80% AFUE furnace is outdated by modern standards, missing out on 90%+ AFUE incentives and long-term energy savings
- 14 SEER1 rating doesn't qualify for Energy Star certification, limiting appeal to efficiency-focused homeowners
- 73 dB noise level runs louder than high-efficiency competitors, noticeable during operation
Who Should Buy
Best For
Budget-conscious homeowners and contractors installing systems in rental properties or homes where occupancy may be temporary. This unit makes sense for replacements in moderate climates where maximum efficiency ROI doesn't justify premium pricing.
Consider Alternatives If
Anyone prioritizing long-term energy savings, living in cold climates requiring high furnace efficiency, or seeking Energy Star certification for incentives or resale value.
Installation
Standard downflow installation fits most basement and utility closet applications. The 32.5-inch height, 29-inch width and depth require typical ductwork connections. Requires 208/230V single-phase 60 Hz power with 22 to 35 amp breaker sizing. Metal exhaust flue is mandatory. Scroll compressor design offers reliable field performance and straightforward service.
Warranty & Reliability
Ten-year coverage on parts and compressor with online registration provides reasonable protection against manufacturer defects. This is standard for mid-tier units but shorter than premium brands offering 12-year or lifetime compressor warranties. Registration is required, so document carefully at installation.
Specifications
| SKU | LS38783830 |
| Brand/Manufacturer | Online Supply |
| Cooling BTU | 42,000 |
| Heating BTU | 100,000 |
| Refrigerant | R410A |
| Electrical | 208 / 230 V. 1 Phase 60 Hz |
| Warranty | 10 Years with Online Registration |
| Decibel Level (dBA) | 73 |
| Weight (in lbs) | 30.000000 |
| Feature | Spec |
| Exhaust Flue Requirement | Metal |
| Furnace Efficiency / AFUE | 80% |
| Blower Motor | Multi-Speed |
| Maximum CFM | 2000 |
| Configuration | Upflow / Downflow |
| Burner Stages | Two |
| Fuel Type | Gas |
| Height | 32.5" |
| Width | 29" |
| Depth | 29" |
| Resources | Goodman Installation Manual Goodman Specifications Goodman Brochure Goodman Warranty Information Goodman Service Instructions Goodman Kit Instructions Goodman Parts Manual 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. |
| Liquid Line | 3/8" |
| Suction Line | 7/8" |
| Tonnage | 3.5 Ton |
| Style | A-Coil |
| Energy Star | No |
| SEER1 (Efficiency) | 14 |
| Condenser Stages | Single Stage |
| Compressor Type | Scroll |
| Liquid Valve Size | 3/8" |
| Suction Valve Size | 7/8" |
| Max Breaker Size | 35 amps |
| Min. Breaker Size | 22 amps |
| Suction Line Insulation Thickness | 3/8" |
| Length | 30 feet |
Frequently Asked Questions
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