Review
The Goodman 1.5 Ton gas furnace and heat pump system (model LS38343850) targets the practical contractor and budget-conscious homeowner. This unit combines natural gas or propane heating with electric cooling in a single integrated solution. The upflow A-coil configuration fits standard attic or basement installations. Online Supply positions this as a cost-effective replacement for aging Goodman models like the GSZ140191. The system earns Energy Star certification, qualifying buyers for manufacturer rebates in many markets.
Performance specs reveal a 40,000 BTU heating capacity with 96% AFUE efficiency, meaning 96 cents of every heating dollar converts to usable heat. Cooling delivers 18,000 BTU at 14.5 SEER1 efficiency, using R410A refrigerant. The variable-speed ECM blower motor runs at up to 1200 CFM, adjusting output based on demand rather than cycling on and off. Two-stage burners modulate heat output, reducing temperature swings compared to single-stage units. This combination supports consistent comfort without premium efficiency pricing.
Pros & Cons
Pros
- 96% AFUE furnace efficiency exceeds baseline 90% standards, reducing heating fuel costs noticeably
- 14.5 SEER cooling rating qualifies for Energy Star, meeting efficiency rebate requirements in many states
- Variable-speed ECM blower motor optimizes comfort by adjusting airflow rather than running full blast constantly
- Two-stage burner provides modulating heat output, reducing temperature swings and improving comfort
- Lifetime heat exchanger warranty covers the most expensive component, backed by straightforward online registration
Cons
- Single-stage compressor cannot modulate cooling capacity, running at full power until thermostat setpoint is reached
- 70 dB noise level at full capacity may be noticeable in quieter homes or bedrooms during peak cooling
- Tonnage specification shows 3 Ton capacity but listed cooling is only 18,000 BTU (1.5 Ton), creating confusion in the documentation
Who Should Buy
Best For
Homeowners in climates requiring both heating and cooling who prioritize fuel efficiency and want to avoid premium-brand pricing. Contractors installing systems in moderate-tonnage applications where dual-fuel flexibility matters and rebate eligibility drives purchasing decisions.
Consider Alternatives If
Anyone needing inverter-style variable capacity compressors for continuous comfort or homes where acoustic performance is critical should explore higher-end alternatives.
Installation
This upflow unit requires standard 115V single-phase power and a 20-amp breaker maximum (11.8 amp minimum). The plastic or PVC exhaust flue accommodates most modern vent systems. Sweat-type refrigerant connections use 3/8 inch liquid and 3/4 inch suction lines with matching valve sizes. The unit measures 34.5 inches tall, 17.5 inches wide, and 28.75 inches deep, fitting typical furnace closets. Installation involves standard electrical and refrigerant connections familiar to licensed HVAC technicians.
Warranty & Reliability
Goodman provides a lifetime warranty on the heat exchanger core against defects, covering the component most likely to fail catastrophically. Parts carry a 10-year warranty when registered online at Goodman's site, protecting compressors, blowers, and controls. Registration is straightforward and required to activate coverage. This warranty structure is standard for mid-tier equipment, offering genuine protection without premium-brand costs.
Specifications
| SKU | LS38343850 |
| Brand/Manufacturer | Online Supply |
| Cooling BTU | 18000 |
| Heating BTU | 40,000 |
| Refrigerant | R410A |
| Electrical | 115 V. 1 Phase 60 Hz |
| Warranty | Lifetime Heat Exchanger and 10 Years Parts with Online Registration |
| Decibel Level (dBA) | 70 |
| Weight (in lbs) | 22.000000 |
| Feature | Spec |
| Replaces | GSZ140191 |
| Energy Star | Yes |
| SEER1 (Efficiency) | 14 |
| Condenser Stages | Single Stage |
| Compressor Type | Rotary |
| Liquid Valve Size | 3/8" |
| Suction Valve Size | 3/4" |
| Max Breaker Size | 20 amps |
| Min. Breaker Size | 11.8 amps |
| Tonnage | 3 Ton |
| Valve Type | Sweat |
| Height | 34.5" |
| Width | 17.5" |
| 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 | 3/4" |
| Style | A-Coil |
| AHRI Certificate Number | 7368841 |
| Airflow Direction | Upflow/Horizontal |
| Exhaust Flue Requirement | Plastic / PVC |
| Product Features | Rebate Available |
| Furnace Efficiency / AFUE | 96% |
| Blower Motor | Variable Speed - ECM |
| Maximum CFM | 1200 |
| Burner Stages | Two |
| Fuel Type | Propane, Natural Gas |
| Suction Line Insulation Thickness | 3/4" |
| Length | 50 feet |
Frequently Asked Questions
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