Review
The Goodman 3.5 ton gas furnace and air conditioner system sits squarely in the mainstream market, offering proven reliability with respectable efficiency credentials. Manufactured by Goodman and distributed through Online Supply, this upflow-configured unit combines a 100,000 BTU furnace with 42,000 BTU cooling capacity in a single package. The 14 SEER rating and 80% AFUE efficiency reflect current industry standards rather than premium performance, making it attractive to contractors and homeowners balancing capability with cost constraints.
Performance specs reveal a competent workhorse rather than a efficiency champion. The system delivers 42,000 BTU of cooling capacity with a single-stage scroll compressor using R410A refrigerant. Two-stage burner operation and variable-speed blower motor reaching 2,000 CFM maximum provide adaptive comfort, adjusting output based on demand. The 80% AFUE heating efficiency is respectable but trails modern condensing furnaces. Electrical requirements remain modest at 120V single-phase with 22 to 35 amp breaker sizing, simplifying installation in standard residential panels.
Pros & Cons
Pros
- 14 SEER cooling efficiency provides solid energy savings compared to older systems, reducing cooling costs by 20-30% versus 10 SEER units
- Two-stage burner and variable-speed blower motor deliver comfort and efficiency gains, cycling down during moderate weather to reduce runtime
- 80% AFUE meets modern heating standards with dual fuel capability supporting both natural gas and propane
- Compact A-coil design fits tight attic spaces, measuring 34.5 inches tall with 21-inch width
- 10-year warranty with online registration provides meaningful coverage for residential applications
Cons
- 80% AFUE is not high-efficiency, mid-tier at best, missing out on 95%+ AFUE available in modern alternatives
- Single-stage condenser limits ability to modulate cooling capacity, running at full output even during mild weather
- 73 dB noise level ranks moderately loud, potentially noticeable in quiet neighborhoods or near bedrooms
Who Should Buy
Best For
Budget-conscious homeowners replacing systems in attics or utility closets who want a reliable, mid-efficiency solution without premium pricing. Contractors seeking dependable equipment for rental properties or client budgets under $5,000 will appreciate the balance of capability and cost.
Consider Alternatives If
Buyers in high-heat climates or those seeking maximum long-term energy savings should look at 16+ SEER systems with variable-capacity compressors, or homeowners prioritizing whisper-quiet operation may find the 73 dB level distracting.
Installation
Upflow A-coil configuration fits standard attic or utility closet installations with overall dimensions of 34.5 inches height, 21 inches width, and 28.75 inches depth. Liquid and suction lines measure 3/8 inch and 7/8 inch respectively, with pre-insulated suction line at 3/8 inch thickness. Metal flue exhausting is required. Variable-speed blower motor and two-stage gas operation require modern thermostats. Professional HVAC installation is strongly recommended for refrigerant charging and safety compliance.
Warranty & Reliability
Goodman provides 10-year parts warranty when registered online, covering compressor and major components. Registration is straightforward and extends protection beyond basic coverage. This warranty is typical for mid-tier systems but does not include labor costs. Extended warranty options may be available through distributors, and many contractors offer service plans bundled with installation.
Specifications
| SKU | LS38783830 |
| Brand/Manufacturer | Online Supply |
| Cooling BTU | 42,000 |
| 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) | 30.000000 |
| Feature | Spec |
| 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 |
| Tonnage | 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 |
| Liquid Line | 3/8" |
| Suction Line | 7/8" |
| 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 | 3/8" |
| Length | 30 feet |
Frequently Asked Questions
Affiliate disclosure: IndustrialRank earns a commission on qualifying purchases at no extra cost to you. We only recommend products we have independently reviewed.