Review
The Goodman 3-ton (or 3.5-ton, per spec sheet) horizontal gas furnace and air conditioner system represents a straightforward, middle-market approach to home climate control. Manufactured by Goodman, a brand with decades of contractor presence, this unit combines an 80,000 BTU furnace with 36,000 BTU cooling capacity in a single package. It's designed for horizontal installation in attics, crawlspaces, or basements, making it flexible for various home configurations.
Performance metrics look solid across both seasons. The furnace delivers 96% AFUE (Annual Fuel Utilization Efficiency), meaning 96 cents of every heating dollar translates to warm air for your home. Cooling-side SEER 14 efficiency is respectable, particularly for a single-stage scroll compressor. The unit uses R410A or R22 refrigerant and pairs with a multi-speed blower motor capable of 1,600 CFM maximum airflow. At 73 dBA, it operates at moderate noise levels typical of this class.
Pros & Cons
Pros
- 96% AFUE furnace efficiency matches or exceeds most mid-tier competitors, reducing winter heating costs
- SEER 14 cooling efficiency is respectable for a single-stage compressor unit, delivering 36,000 BTU cooling capacity
- Multi-speed blower motor allows fine-tuned airflow control for better comfort and energy management
- Generous 10-year warranty with online registration provides solid long-term protection
- Scroll compressor design offers proven reliability and lower noise at 73 dBA
Cons
- Single-stage cooling compressor limits part-load efficiency in mild weather, compared to variable-capacity alternatives
- Spec discrepancy exists: title claims 3 tons but sheet lists 3.5 tons, creating confusion about actual capacity
- Not Energy Star certified despite good efficiency ratings, leaving potential rebates on the table
Who Should Buy
Best For
Homeowners in temperate to cold climates replacing older equipment and valuing reliability over cutting-edge technology. This system suits those seeking strong heating performance (80,000 BTU) paired with adequate cooling without premium pricing.
Consider Alternatives If
Buyers in hot climates prioritizing cooling efficiency should look at variable-capacity or two-stage units. Those wanting Energy Star certification and maximum rebate eligibility should consider alternatives.
Installation
Installation requires standard HVAC practices: refrigerant lines (3/8 inch liquid, 3/4 inch suction), electrical connection at 115V single-phase 60Hz, and compliance with local gas and electrical codes. The horizontal A-coil configuration fits tight spaces. Plastic or PVC flue venting is required. Most licensed contractors complete installations in one to two days. Ductwork sizing should match the 1,600 CFM blower capacity.
Warranty & Reliability
Goodman backs this system with 10 years coverage when registered online, which is solid protection for parts and labor. Online registration is straightforward. Coverage typically includes compressor, heat exchanger, and major components. However, verify exact terms and regional limitations, as some labor coverage varies by location and installer.
Specifications
| SKU | LS38343830 |
| Brand/Manufacturer | Online Supply |
| Cooling BTU | 36,000 |
| Heating BTU | 80,000 |
| Refrigerant | R410A or R22 |
| Electrical | 115 V. 1 Phase 60 Hz |
| Warranty | 10 Years with Online Registration |
| Decibel Level (dBA) | 73 |
| Weight (in lbs) | 35.000000 |
| Feature | Spec |
| Energy Star | No |
| SEER1 (Efficiency) | 14 |
| Condenser Stages | Single Stage |
| Compressor Type | Scroll |
| Liquid Line | 3/8" |
| Suction Line | 3/4" |
| Liquid Valve Size | 3/8" |
| Suction Valve Size | 3/4" |
| Max Breaker Size | 30 Amps |
| Min. Breaker Size | 18.7 Amps |
| Tonnage | 3.5 Ton |
| 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 |
| Style | A-Coil |
| Airflow Direction | Downflow/Horizontal |
| Exhaust Flue Requirement | Plastic / PVC |
| Furnace Efficiency / AFUE | 96% |
| Blower Motor | Multi Speed |
| Maximum CFM | 1600 |
| Flue Location | Right |
| Burner Stages | Single |
| Fuel Type | Gas |
| Suction Line Insulation Thickness | 3/4" |
| Length | 30 feet |
Frequently Asked Questions
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