Review
Goodman's dual-fuel 3-ton/5-ton combination system targets contractors and homeowners serious about heating efficiency without sacrificing summer cooling. Branded through Online Supply and backed by substantial documentation, this upflow A-coil configuration integrates into attic or basement installations where space permits. The 80,000 BTU furnace and 34,800 BTU cooling capacity establish it as a heavyweight solution for larger homes or cold-weather regions where winter demands dominate annual operating hours.
Performance numbers justify attention to efficiency shoppers. The furnace delivers 96% AFUE, meaning 96 cents of every heating dollar converts to usable warmth, reducing winter utility bills in measurable ways. Cooling efficiency reaches 16 SEER1 against the advertised 15 SEER baseline, hitting Energy Star qualification. The scroll compressor operates at 73.5 decibels, keeping noise within residential comfort bands. Two-stage burners and a variable-speed ECM blower prevent overshooting setpoints, improving comfort precision and part-load efficiency.
Pros & Cons
Pros
- 96% AFUE furnace efficiency reduces heating costs significantly in winter-heavy climates
- 16 SEER1 cooling rating beats the 15 SEER promise, matching Energy Star standards
- Two-stage burner and variable-speed ECM blower optimize comfort across partial-load conditions
- Scroll compressor with R410A/R22 compatibility offers reliable, quiet operation at 73.5 dB
- Lifetime heat exchanger warranty provides genuine peace of mind on furnace longevity
Cons
- 5-ton cooling capacity oversizes most residential applications, wasting money on unnecessary tonnage
- Single-stage condenser cannot modulate cooling capacity, reducing efficiency in mild weather
- Spec sheet lists confusing tonnage mismatch: title claims 3 ton but specs show 5 ton
Who Should Buy
Best For
Cold-climate homeowners in zones 5 and colder who heat with natural gas or propane and need simultaneous AC cooling. This system rewards customers with high heating days annually and those planning to stay in the home long enough to recoup furnace efficiency gains.
Consider Alternatives If
Mild-climate buyers and those seeking a cooling-primary system should explore single-stage compressors with lower tonnage ratings, as this 5-ton unit will short-cycle and waste energy.
Installation
Installation demands 115V single-phase 60Hz power with a 30-amp maximum breaker and 18.7-amp minimum. Upflow orientation suits attics or closets with 34.5-inch height clearance. Suction line insulation rated 3/4 inch thickness and 50-foot maximum length protect refrigerant quality. PVC exhaust flue on the right side accommodates flexible, modern venting. Proper ductwork matching 1600 CFM maximum airflow ensures system realizes rated efficiency.
Warranty & Reliability
Goodman delivers lifetime coverage on the heat exchanger, the furnace's most expensive component, protecting against catastrophic failure decades ahead. Ten-year parts warranty requires online registration but covers compressors, blowers, and controls. This combination ranks among industry-leading protections, reflecting manufacturer confidence in assembly quality and component longevity.
Specifications
| SKU | LS38783850 |
| Brand/Manufacturer | Online Supply |
| Cooling BTU | 34,800 |
| Heating BTU | 80,000 |
| Refrigerant | R410A or R22 |
| Electrical | 115 V. 1 Phase 60 Hz |
| Warranty | Lifetime Heat Exchanger and 10 Years Parts with Online Registration |
| Decibel Level (dBA) | 73.5 |
| Weight (in lbs) | 30.000000 |
| Feature | Spec |
| Energy Star | Yes |
| SEER1 (Efficiency) | 16 |
| Condenser Stages | Single Stage |
| Compressor Type | Scroll |
| Liquid Valve Size | 3/8" |
| Suction Valve Size | 7/8" |
| Max Breaker Size | 30 amps |
| Min. Breaker Size | 18.7 amps |
| Tonnage | 5 Ton |
| Height | 34.5" |
| Width | 21" |
| 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 | 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 | 7368835 |
| Airflow Direction | Upflow/Horizontal |
| Exhaust Flue Requirement | Plastic / PVC |
| Furnace Efficiency / AFUE | 96% |
| Blower Motor | Variable Speed - ECM |
| Maximum CFM | 1600 |
| Flue Location | Right |
| Burner Stages | Two |
| Fuel Type | Propane, Natural Gas |
| Suction Line Insulation Thickness | 3/4" |
| Length | 50 feet |
Frequently Asked Questions
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