Review
The Goodman 3.5-ton horizontal system targets contractors and homeowners seeking a balanced approach to furnace and air conditioning replacement. Goodman occupies the middle tier of the HVAC market, offering solid efficiency and reliability without premium pricing. This particular unit combines a 120,000 BTU gas furnace with a 36,000 BTU air conditioning condenser, making it suitable for homes between 2,000 and 2,800 square feet depending on insulation and local climate. The horizontal configuration fits tight installation spaces where traditional vertical equipment won't work.
Performance numbers justify the upgrade path for homes with aging equipment. The 96% AFUE furnace converts nearly all fuel to usable heat, a significant jump from systems rated 78-80% AFUE that dominated the market a decade ago. The 16 SEER1 cooling rating means the AC operates at roughly 23% greater efficiency than the baseline 13 SEER standard. Variable-speed blower technology and two-stage cooling allow the system to ramp down during mild weather, reducing energy waste. Real-world testing shows homes switching from 80% AFUE furnaces typically see 15-20% winter utility reductions with this equipment.
Pros & Cons
Pros
- Exceptional heating efficiency at 96% AFUE, meaning only 4% energy loss during combustion
- 16 SEER1 cooling rating significantly outperforms the baseline 13 SEER requirement
- Two-stage burner and two-stage compressor allow the system to modulate output, reducing short cycling and improving comfort
- Variable-speed ECM blower motor optimizes airflow and reduces electricity consumption
- Lifetime heat exchanger warranty plus 10-year parts coverage with online registration provides solid long-term protection
- Energy Star certified, qualifying for utility rebates in many regions
- Scroll compressor is proven technology with low failure rates
Cons
- Requires licensed HVAC technician for installation due to gas line and venting complexity, adding $1,500 to $3,000 in labor costs
- Operates at 70.4 dB, which is moderately loud for a residential unit, especially during high-stage cooling
- Specs show SEER1 of 16 but product title claims 15 SEER, creating potential confusion about actual efficiency rating
Who Should Buy
Best For
Homeowners in climates with significant heating and cooling loads who prioritize operating cost reduction and can justify professional installation expenses. This system works well for homes moving from 10-13 year old equipment where efficiency improvements translate directly to winter and summer bill savings.
Consider Alternatives If
Renters or homeowners with rental properties should avoid this system because the high installation cost requires long ownership to break even. Budget-conscious buyers seeking the cheapest option upfront should consider single-stage alternatives, though long-term costs will be higher.
Installation
Professional installation is mandatory because improper gas line connections or venting create serious safety hazards including carbon monoxide leaks and fire risk. The unit requires 115V single-phase power with a 21.8 to 35-amp breaker, meaning most homes can connect to existing electrical service. Technicians must sweat copper connections using the provided 3/8-inch liquid and 7/8-inch suction valve sizes. Plastic PVC venting is acceptable. Budget 8 to 12 hours of labor for a complete system replacement.
Warranty & Reliability
Goodman backs the heat exchanger for your lifetime of ownership, protecting against catastrophic furnace failure. All other parts receive 10 years coverage after you register the unit online. This two-tier approach reflects Goodman's confidence in core components while acknowledging that capacitors and blower motors have shorter expected lifespans. No labor coverage is included, so repairs cost extra for service calls and technician time.
Specifications
| SKU | GMVC961205DN |
| Brand/Manufacturer | Goodman |
| Cooling BTU | 36,000 |
| Heating BTU | 120,000 |
| Refrigerant | R410A |
| Electrical | 115 V. 1 Phase 60 Hz |
| Warranty | Lifetime Heat Exchanger and 10 Years Parts with Online Registration |
| Decibel Level (dBA) | 70.4 |
| Weight (in lbs) | 156.000000 |
| Feature | Spec |
| Energy Star | Yes |
| SEER1 (Efficiency) | 16 |
| Condenser Stages | Two Stage |
| Compressor Type | Scroll |
| Liquid Valve Size | 3/8" |
| Suction Valve Size | 3/4" |
| Max Breaker Size | 35 amps |
| Min. Breaker Size | 21.8 amps |
| Tonnage | 3.5 Ton |
| Valve Type | Sweat |
| Height | 34.5" |
| Width | 24.5" |
| Depth | 28.75" |
| Resources | Goodman Brochure Goodman Install 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 | This gas appliance requires a trained technician to install. Improperly connecting gas lines or improperly connecting a gas flue or venting may result in death. By purchasing this item, you are agreeing that you are using a trained technician to install this gas appliance. We will not be responsible for any injury or property damage arising from improper service or service procedures. Whoever installs or services this unit assumes responsibility for any personal injury or property damage which may result. Many jurisdictions require a license to install this equipment. 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 |
| AHRI Certificate Number | 7368842 |
| Airflow Direction | Upflow/Horizontal |
| Exhaust Flue Requirement | Plastic / PVC |
| Product Features | Rebate Available |
| Furnace Efficiency / AFUE | 96% |
| Blower Motor | Variable Speed - ECM |
| Maximum CFM | 2000 |
Frequently Asked Questions
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