Review
The Goodman 3-ton downflow gas furnace and air conditioner system represents a practical middle ground in the residential HVAC market. Priced at $504, this combo unit targets homeowners and contractors seeking reliable equipment without premium pricing. Goodman maintains strong presence in contractor networks for good reason: their systems deliver consistent performance. This particular model emphasizes efficiency, carrying both Energy Star certification and respectable seasonal ratings that should appeal to cost-conscious buyers.
Performance specs tell an encouraging story. The furnace achieves 96% AFUE, meaning 96 cents of every heating dollar converts to home warmth, with 100,000 BTU capacity for adequate winter heating. Cooling delivers 18 SEER1 efficiency with a two-stage scroll compressor, variable-speed ECM blower motor, and plastic PVC exhaust compatibility. The unit operates at 71 dB, uses R410A refrigerant, and requires standard 115V single-phase 60Hz power with 21.3 to 35 amp breaker sizing. These specs align with modern efficiency standards.
Pros & Cons
Pros
- 96% AFUE furnace efficiency minimizes heating fuel waste and reduces winter utility bills significantly
- 18 SEER1 cooling rating exceeds Energy Star requirements for optimal air conditioning performance
- Two-stage compressor and variable-speed ECM blower motor optimize comfort across partial and full load conditions
- 100,000 BTU heating capacity handles cold climates with adequate sizing for most residential applications
- 10-year warranty with online registration provides solid long-term protection at this price tier
Cons
- Product listing shows conflicting tonnage data: title states 3 ton while specs list 3.5 ton, creating confusion
- 35,000 cooling BTU appears undersized relative to the 3.5 ton rating, suggesting potential specification error
- 71 dB noise level runs slightly loud during operation, noticeable in quieter neighborhoods or bedrooms
Who Should Buy
Best For
Homeowners replacing 15+ year old furnace and AC units who prioritize efficiency savings over premium features, or budget-conscious contractors needing dependable residential combo systems for modest-sized homes in moderate to cold climates.
Consider Alternatives If
Anyone requiring a true 3-ton system should verify actual cooling capacity, and buyers in noise-sensitive environments may prefer units rated below 70 dB.
Installation
This downflow A-coil configuration suits attic or basement installations where gravity-assisted airflow works naturally. Copper line sets feature 3/8 inch liquid and 7/8 inch suction ports with 3/4 inch insulation thickness and 50-foot maximum length. Standard sweat valve connections require basic soldering skills or professional service. Electrical installation demands only standard 120V power. Most contractors complete installation in one day with proper staging.
Warranty & Reliability
Online registration unlocks a 10-year parts and compressor warranty, placing this system in the solid mid-tier protection category. Coverage extends through typical system lifespan for residential use. Registration is straightforward and necessary to activate benefits. This warranty assumes proper installation and maintenance per Goodman specifications.
Specifications
| SKU | LS38783850 |
| Brand/Manufacturer | Online Supply |
| 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) | 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 | 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 | Downflow/Horizontal |
| Liquid Line | 3/8" |
| Suction Line | 7/8" |
| Style | A-Coil |
| AHRI Certificate Number | 7368844 |
| Airflow Direction | Downflow/Horizontal |
| Exhaust Flue Requirement | Plastic / PVC |
| Furnace Efficiency / AFUE | 96% |
| Blower Motor | Variable Speed - ECM |
| Maximum CFM | 2000 |
| Burner Stages | Two |
| Fuel Type | Propane, Natural Gas |
| Suction Line Insulation Thickness | 3/4" |
| Length | 50 feet |
Frequently Asked Questions
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