Review
The Goodman 3.5 ton gas furnace and air conditioner system sits squarely in the middle market for residential HVAC. With a 96% AFUE furnace and 13 SEER cooling unit, this upflow A-coil configuration targets contractors and homeowners seeking efficient replacements without premium pricing. The system uses R410A or R22 refrigerant and includes a multi-speed blower motor rated for 2000 CFM maximum airflow, delivering flexible temperature management across seasons.
Heating performance centers on the 100,000 BTU single-stage burner, which produces reliable warmth but lacks modulating capability for low-load efficiency gains. The 42,000 BTU cooling capacity with single-stage reciprocating compressor operates at 75 dB, which some users find audible during peak operation. Electrical requirements run straightforward: 115V single-phase 60 Hz with a minimum 23.9 amp and maximum 40 amp breaker. The 3/8-inch suction line insulation and corresponding liquid line sizing follow industry standards for the tonnage class.
Pros & Cons
Pros
- 96% AFUE furnace efficiency translates to lower heating bills compared to older 80-85% units
- 13 SEER cooling efficiency is respectable for single-stage operation in standard applications
- 100,000 BTU heating capacity handles most residential heating demands without oversizing
- Multi-speed blower motor provides flexible airflow control across varying load conditions
- 10-year warranty with online registration offers meaningful protection for the investment
- PVC exhaust flue compatibility simplifies installation in modern homes with plastic ductwork
Cons
- Single-stage burner and compressor prevent variable modulation, reducing efficiency in partial-load scenarios
- 75 dB noise level is noticeably louder than variable-speed competitors during operation
- Not ENERGY STAR certified, disqualifying homeowners from certain rebate programs
- Reciprocating compressor is louder and less efficient than scroll or rotary options
- Tonnage mismatch in specs (advertised as 3.5 ton but listed as 5 ton) creates confusion
Who Should Buy
Best For
Budget-conscious homeowners replacing failing systems who prioritize heating efficiency and want proven Goodman reliability without paying for variable-stage technology. Contractors managing cost-conscious residential projects where mid-tier efficiency meets customer expectations.
Consider Alternatives If
Homeowners chasing ENERGY STAR rebates, those in noise-sensitive environments, or anyone seeking variable-speed modulation should explore higher-tier Goodman models or competitors like Lennox or York.
Installation
Installation follows conventional upflow configuration with right-side flue location and plastic PVC exhaust compatibility. The unit measures 34.5 inches tall, 21 inches wide, and 28.75 inches deep, fitting standard equipment closets and utility spaces. Sweat-type valve connections require basic soldering skills or professional HVAC service. Multi-speed blower wiring integrates with most modern thermostats, simplifying controls setup during replacement projects.
Warranty & Reliability
Goodman provides a 10-year parts warranty upon online registration, protecting against premature compressor or furnace failures. This coverage is industry-standard for mid-tier equipment and covers labor at authorized dealers in most regions. Registration is mandatory to activate the full warranty term, so documentation must be completed immediately after installation to avoid coverage gaps.
Specifications
| SKU | LS38783830 |
| Brand/Manufacturer | Online Supply |
| Cooling BTU | 42,000 |
| Heating BTU | 100,000 |
| Refrigerant | R410A or R22 |
| Electrical | 115 V. 1 Phase 60 Hz |
| Warranty | 10 Years with Online Registration |
| Decibel Level (dBA) | 75 |
| Weight (in lbs) | 30.000000 |
| Feature | Spec |
| Energy Star | No |
| SEER1 (Efficiency) | 13 |
| Condenser Stages | Single Stage |
| Compressor Type | Reciprocating |
| Liquid Line | 3/8" |
| Suction Line | 7/8" |
| Liquid Valve Size | 3/8" |
| Max Breaker Size | 40 amps |
| Min. Breaker Size | 23.9 amps |
| Tonnage | 5 Ton |
| Valve Type | Sweat |
| Height | 34.5" |
| Width | 21" |
| Depth | 28.75" |
| Resources | Goodman Brochure Goodman Installation Instructions Goodman Parts Manual Goodman Service Manual Goodman Specifications 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 |
| Style | A-Coil |
| Airflow Direction | Upflow/Horizontal |
| Exhaust Flue Requirement | Plastic / PVC |
| Furnace Efficiency / AFUE | 96% |
| Blower Motor | Multi Speed |
| Maximum CFM | 2000 |
| Flue Location | Right |
| Burner Stages | Single |
| Fuel Type | Gas |
| Suction Line Insulation Thickness | 3/8" |
| Length | 30 feet |
Frequently Asked Questions
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