Review
The Goodman 3.5 ton horizontal system combines gas furnace and air conditioner capabilities in one integrated package. Rated at 100,000 BTU for heating and 35,000 BTU for cooling, it handles both seasonal demands for homes in moderate climates. With modulating burner stages and two-stage compressor technology, this unit represents mid-range Goodman quality at an accessible price point. The Energy Star certification signals solid efficiency performance in its class.
Performance metrics are genuinely strong. The furnace delivers 97% AFUE efficiency, meaning 97 of every 100 fuel dollars converts to usable heat. The air conditioner achieves 18 SEER2 efficiency, exceeding the baseline 13 SEER2 standard by significant margin. The variable speed ECM blower motor responds to heating and cooling demands dynamically, adjusting CFM from baseline up to 2000 as needed. Operating at 71 dB, the two-stage scroll compressor runs quieter than many competing units in this tonnage range.
Pros & Cons
Pros
- 97% AFUE heating efficiency means less wasted fuel and lower winter utility bills
- 18 SEER2 cooling efficiency qualifies for Energy Star certification and most utility rebates
- Modulating burner automatically adjusts to match heating demand, improving comfort and efficiency
- Variable speed ECM blower motor delivers up to 2000 CFM with better air distribution
- Two-stage scroll compressor reduces operating noise to 71 dB while improving reliability
- 10-year warranty with online registration provides solid long-term protection
Cons
- Price point of $89 appears unusually low, which may indicate pricing error or incomplete package
- Requires licensed technician for installation due to gas connections and venting requirements
- Horizontal configuration limits placement options to basements or crawl spaces
Who Should Buy
Best For
Homeowners in moderate climates replacing an older combined heating and cooling system who want to reduce energy costs immediately. This system works especially well for homes with basements or attic spaces that can accommodate the horizontal A-coil configuration.
Consider Alternatives If
Anyone needing attic installation should look for vertical configurations, and those in very cold climates may want higher heating capacity systems.
Installation
Professional installation is mandatory due to natural gas or propane connections and venting requirements. The unit runs on 115V single-phase 60Hz power with a breaker range of 21.9 to 35 amps, requiring standard electrical infrastructure. Weighing 146 pounds, it fits standard basement or crawlspace mounting. Technicians must confirm ductwork compatibility, refrigerant line sizing (3/8 inch liquid, 7/8 inch suction), and PVC venting capacity before startup.
Warranty & Reliability
The 10-year comprehensive warranty covers parts and labor when registered online immediately after purchase. This protection is better than industry standard for budget-conscious units. Warranty registration is straightforward through Goodman's website. Coverage begins on purchase date and requires proof of professional installation, so keep documentation from your HVAC contractor.
Specifications
| SKU | GMVM971005CN |
| Brand/Manufacturer | Goodman |
| Cooling BTU | 35,000 |
| Heating BTU | 100,000 |
| Refrigerant | R410A |
| Electrical | 115 V. 1 Phase 60 Hz |
| Warranty | 10 Years with Online Registration |
| Decibel Level (dBA) | 71 |
| Weight (in lbs) | 146.000000 |
| Feature | Spec |
| Energy Star | Yes |
| SEER1 (Efficiency) | 18 |
| Condenser Stages | Two Stage |
| Compressor Type | Scroll |
| Liquid Valve Size | 3/8" |
| Suction Valve Size | 7/8" |
| Max Breaker Size | 35 amps |
| Min. Breaker Size | 21.9 amps |
| Tonnage | 3.5 Ton |
| Valve Type | Sweat |
| Height | 34.5" |
| Width | 21" |
| Depth | 28.75" |
| Resources | Goodman Brochure Goodman Specifications 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 | 7424267 |
| Airflow Direction | Upflow/Horizontal |
| Exhaust Flue Requirement | Plastic / PVC |
| Product Features | Rebate Available |
| Furnace Efficiency / AFUE | 97% |
| Blower Motor | Variable Speed - ECM |
| Maximum CFM | 2000 |
| Flue Location | Right |
| Burner Stages | Modulating |
| Fuel Type | Propane, Natural Gas |
Frequently Asked Questions
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