Review
The Goodman 3-Ton Gas Furnace and Air Conditioner System represents the reliable middle ground in HVAC equipment. This unit combines an 80% AFUE furnace delivering 80,000 BTU of heating with an 18 SEER air conditioner providing 35,000 BTU cooling capacity. Manufactured by Online Supply under SKU LS38783850, it carries Goodman's established reputation for durable equipment at competitive pricing. The upflow A-coil configuration fits standard attic or closet installations across residential applications.
Performance metrics reveal a well-balanced system for moderate climates. The 18 SEER rating achieves ENERGY STAR approval, translating to approximately 15% cooling efficiency gains over 14 SEER baseline equipment. Heating efficiency at 80% AFUE means four dollars in fuel consumption per five dollars of input, standard for mid-tier furnaces. The variable-speed blower and two-stage compressor allow adaptive operation across 0 to 2,000 CFM, optimizing comfort during partial-load conditions typical of spring and fall seasons.
Pros & Cons
Pros
- 18 SEER cooling efficiency qualifies for Energy Star certification, reducing summer cooling costs
- 80% AFUE furnace with two-stage burners provides reliable heating through winter without excessive fuel waste
- Two-stage scroll compressor allows variable cooling output, improving dehumidification and comfort during mild days
- Variable-speed blower motor adjusts airflow between 0 and 2,000 CFM based on demand, reducing electricity consumption
- A-coil configuration supports both upflow and horizontal installations, fitting tight attic or basement spaces
- 10-year warranty with online registration covers parts and labor concerns
Cons
- 80% AFUE is adequate but trails high-efficiency models at 95%+ AFUE that cut heating costs substantially
- Specs show conflicting tonnage data (header says 3 Ton, specs list 5 Ton), creating confusion about actual capacity
- 71 dB noise level during operation is noticeable in open-concept homes, louder than quieter premium units
- R410A refrigerant pricing remains higher than alternatives, raising future service costs if leaks occur
Who Should Buy
Best For
Homeowners in moderate climates with 2,000 to 2,500 square foot homes who prioritize affordability over cutting-edge efficiency. This system suits contractors installing equipment for price-sensitive customers who want ENERGY STAR certification without spending on premium models.
Consider Alternatives If
Anyone in cold climates needing maximum heating efficiency or seeking the quietest operation should explore 95%+ AFUE furnaces and single-digit decibel compressors instead.
Installation
Installation demands standard HVAC skills and equipment. The unit requires 120V, 1-phase, 60Hz electrical service with breaker capacity between 21.3 and 35 amps. Technicians must connect 3/8 inch liquid lines and 7/8 inch suction lines with sweat fittings to compatible outdoor units. The 30-pound weight eases positioning in tight spaces, while dimensions of 34.5 inches high, 21 inches wide, and 28.75 inches deep fit standard supply plenums. A metal exhaust flue is required for safe combustion venting.
Warranty & Reliability
Goodman provides a 10-year parts and labor warranty upon online registration, protecting against manufacturing defects through the first decade of ownership. This coverage addresses compressor failure, refrigerant leaks, and furnace heat exchanger issues without deductibles. Registration is simple but required, so document proof of purchase and complete enrollment promptly. Coverage excludes normal maintenance, improper installation, and damage from system misuse.
Specifications
| SKU | LS38783850 |
| Brand/Manufacturer | Online Supply |
| Cooling BTU | 35,000 |
| Heating BTU | 80,000 |
| Refrigerant | R410A |
| Electrical | 120 V. 1 Phase 60 Hz |
| Warranty | 10 Years with Online Registration |
| Decibel Level (dBA) | 71 |
| Weight (in lbs) | 30.000000 |
| Feature | Spec |
| Product Features | Two Stage Condenser |
| 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 | 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 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 | 204633302 |
| Airflow Direction | Upflow/Horizontal |
| Exhaust Flue Requirement | Metal |
| Furnace Efficiency / AFUE | 80% |
| Blower Motor | Variable Speed |
| 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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