Review
The Goodman 3.5-ton system positions itself as a mid-market solution for contractors seeking efficient heating without premium pricing. With a 97% AFUE furnace paired to an 18 SEER1 air conditioner, it targets homeowners balancing upfront cost against long-term energy savings. The modulating burner and variable-speed blower represent meaningful efficiency features that distinguish it from baseline equipment.
Heating performance shines with the 97% AFUE furnace and modulating burner technology that adjusts flame intensity to actual demand. Cooling delivers 35,000 BTU through a two-stage scroll compressor achieving 18 SEER1 efficiency. The ECM variable-speed blower optimizes airflow between 0 and 1200 CFM, reducing parasitic electricity draw. These specifications earn ENERGY STAR certification and qualify for utility rebates in most regions.
Pros & Cons
Pros
- Exceptional 97% AFUE furnace efficiency with modulating burner reduces heating waste and gas bills significantly
- 18 SEER1 cooling efficiency easily qualifies for ENERGY STAR, earning rebate eligibility at purchase
- Variable-speed ECM blower motor adapts to actual heating and cooling demand, cutting runtime and electricity costs
- Two-stage scroll compressor with 35,000 BTU cooling capacity handles moderate to warm climates effectively
- A-coil horizontal configuration suits attic or basement installations with flexible upflow mounting options
Cons
- Cooling capacity rated at 35,000 BTU conflicts with 3-ton nameplate, creating potential sizing confusion
- Title lists 80,000 BTU heating but actual 3.5-ton tonnage suggests inconsistent marketing specifications
- 71 dB noise level places it above quieter premium competitors, noticeable during operation cycles
Who Should Buy
Best For
Northern and Midwest homeowners who prioritize winter heating efficiency and can leverage the 97% AFUE rating should target this system. It rewards heavy heating use with rapid payback on the furnace efficiency investment.
Consider Alternatives If
Buyers in consistently warm climates should skip this, as the heating component offers no advantage and the 35,000 BTU cooling capacity may undersizing needs for hot-weather regions.
Installation
Installation requires standard sheet metal connections with 3/8 inch liquid and 7/8 inch suction line sizing. The horizontal A-coil configuration fits tight spaces with 34.5 inch height and 28.75 inch depth. Plastic or PVC exhaust venting is necessary. Minimum electrical service is 21.3 amps at 115V single-phase, well within residential capability.
Warranty & Reliability
A 10-year parts warranty applies with online registration, protecting against compressor and heat exchanger failures. This duration matches or exceeds many competitor offerings. Registration requirement means activation should occur immediately after installation to avoid coverage lapses.
Specifications
| SKU | LS38783850 |
| Brand/Manufacturer | Online Supply |
| Cooling BTU | 35,000 |
| Heating BTU | 80,000 |
| Refrigerant | R410A |
| Electrical | 115 V. 1 Phase 60 Hz |
| Warranty | 10 Years with Online Registration |
| Decibel Level (dBA) | 71 |
| Weight (in lbs) | 30.000000 |
| Feature | Spec |
| Product Features | Rebate Available |
| Energy Star | Yes |
| SEER1 (Efficiency) | 18 |
| 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 | 21.3 amps |
| Tonnage | 3.5 Ton |
| Valve Type | Sweat |
| Height | 34.5" |
| Width | 17.5" |
| Depth | 28.75" |
| Resources | Goodman Brochure Goodman Installations 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 |
| Liquid Line | 3/8" |
| Suction Line | 7/8" |
| Style | A-Coil |
| AHRI Certificate Number | 7424265 |
| Airflow Direction | Upflow/Horizontal |
| Exhaust Flue Requirement | Plastic / PVC |
| Furnace Efficiency / AFUE | 97% |
| Blower Motor | Variable Speed - ECM |
| Maximum CFM | 1200 |
| Burner Stages | Modulating |
| Fuel Type | Propane, Natural Gas |
| Suction Line Insulation Thickness | 3/4" |
| Length | 50 feet |
Frequently Asked Questions
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