Review
The Goodman 3 Ton Upflow Gas Furnace and Air Conditioner System represents the midrange efficiency sweet spot for residential HVAC. At $736, it positions itself as an accessible upgrade path for homeowners tired of aging equipment but unwilling to jump to premium brands. This matched pair carries genuine engineering: a 96% AFUE furnace paired with an 18 SEER2 air conditioner, both certified by AHRI. Online Supply's retail pricing makes this competitive against local contractor quotes.
Performance specs tell a practical story. The furnace delivers 100,000 BTU of heating output with two-stage burner operation, meaning it modulates down to part capacity most of the time. The air conditioner produces 35,000 BTU cooling with a scroll compressor and two-stage design, hitting that 18 SEER2 rating with R410A refrigerant. The variable-speed ECM blower hits 2000 CFM maximum, adapting airflow rather than running full-blast constantly. This approach cuts utility bills 15-25% versus single-stage equipment.
Pros & Cons
Pros
- 96% AFUE furnace efficiency reduces heating costs significantly compared to 80-85% systems common in older homes
- 18 SEER2 cooling efficiency qualifies for Energy Star certification and rebates in many utility territories
- Variable-speed ECM blower motor adjusts output automatically, improving comfort and reducing runtime waste
- Two-stage burner and two-stage compressor enable efficient partial-load operation 80% of the year
- Lifetime heat exchanger warranty protects against the costliest potential failure point
- A-coil design fits in attics and basements, accommodating upflow and horizontal configurations
Cons
- 71 dB noise level during cooling is moderately loud, noticeable near a bedroom or living space
- Tonnage mismatch noted in specs, 3 ton claimed but 3.5 ton listed, may indicate SKU confusion
- Requires 21.3 to 35 amp breaker, forcing some panel upgrades in older homes with limited capacity
Who Should Buy
Best For
Homeowners in northern climates replacing furnaces from the 1990s or early 2000s will see immediate monthly savings. Contractors stocking matched systems for quick turnarounds benefit from the predictable performance and AHRI certification number 7368836.
Consider Alternatives If
Budget-conscious buyers seeking equipment under $600 or anyone needing a whisper-quiet system should explore alternatives, as this unit prioritizes efficiency over silent operation.
Installation
Installation demands standard HVAC skills and materials. The unit requires 115V, 1-phase power with 21.3 to 35 amp breaker sizing, necessitating panel upgrades in older homes. Plastic PVC exhaust venting is required for the furnace. Suction and liquid lines measure 7/8 inches and 3/8 inches respectively, with 50-foot insulated line sets available. The A-coil measures 34.5 inches tall, 21 inches wide, and 28.75 inches deep, fitting most attics and closets.
Warranty & Reliability
Goodman backs the heat exchanger for the life of the system, meaning zero cost if internal corrosion occurs, the number-one furnace failure point. Parts carry 10-year coverage with online registration required. This two-tier structure protects your investment while encouraging proper maintenance. Labor remains the buyer's responsibility after year one.
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 | Lifetime Heat Exchanger and 10 Years Parts 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 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 | 7368836 |
| Airflow Direction | Upflow/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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