1. General Information
The Duluth Forge Ventless Liquid Propane Gas Stove, Model QSL250T, is designed to provide efficient heating for spaces up to 1,100 square feet. This unit features a large viewing area with realistic hand-painted ceramic fiber logs and a dual burner system that produces two rows of flames. Its vent-free technology ensures 99.9% efficiency, eliminating the need for an outside duct or chimney. The built-in thermostatic control allows for precise temperature management, cycling the heater on and off to maintain your desired room temperature.
Key Features:
- Heat Output: 25,000 BTU, capable of heating up to 1,100 sq. ft.
- Fuel Type: Operates on Liquid Propane.
- Control: Thermostatic control with variable heat settings.
- Logs: 5 improved realistic hand-painted ceramic fiber logs.
- Efficiency: 99.9% efficient, vent-free design.
- Safety: Equipped with an Oxygen Depletion Sensor (O.D.S.) for automatic shut-off.
- Ignition: Battery-assisted Piezo ignition for easy startup.
- Construction: Solid steel construction for durability.

Image: The Duluth Forge Ventless Liquid Propane Gas Stove, Model QSL250T, displayed in a modern living room. The stove is black with a large viewing area showing realistic flames and logs, positioned between a wooden cabinet and an armchair.
2. Safety Information
WARNING: This product can expose you to chemicals including Carbon Monoxide, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
Always read and follow all instructions and warnings provided in the complete manual before installation and use. Improper installation, adjustment, alteration, service, or maintenance can cause property damage, personal injury, or loss of life.
Important Safety Features:
- Oxygen Depletion Sensor (O.D.S.): This stove is equipped with an O.D.S. system that automatically shuts off the unit if oxygen levels in the room fall below a safe threshold.
- Vent-Free Design: While vent-free, ensure adequate ventilation as per local codes and manufacturer guidelines.
- Clearances: Maintain proper clearances from combustible materials as specified in the full installation manual.
3. Setup
The Duluth Forge Ventless Liquid Propane Gas Stove is designed for maximum pre-assembly to simplify installation. However, some assembly is required, and not all parts needed to connect the gas line are included and must be purchased separately. Professional installation is recommended to ensure proper and safe operation.
Installation Steps (Summary):
- Unpacking: Carefully remove all components from the packaging. Inspect for any damage.
- Placement: Choose a suitable location that adheres to all local codes and manufacturer's clearance requirements for vent-free appliances. Ensure the surface is level and non-combustible.
- Gas Line Connection: Connect the liquid propane gas supply line to the unit. This step often requires additional parts not included with the stove and should be performed by a qualified professional.
- Log Placement: Arrange the ceramic fiber logs according to the diagrams in the detailed manual to ensure proper flame distribution and appearance.
- Battery Installation: Install one AAA battery for the electric Piezo ignition system.
- Leak Test: After connecting the gas line, perform a leak test using a non-corrosive leak detection solution to ensure all connections are secure.

Image: A detailed view of the stove's interior, showcasing the arrangement of the hand-painted ceramic fiber logs over the burner, with a realistic ember bed effect.
4. Operating Instructions
The Duluth Forge Ventless Liquid Propane Gas Stove features easy-to-use controls for ignition and temperature management.
Ignition Procedure:
- Ensure Gas Supply: Verify that the main gas supply valve to the stove is open.
- Pilot Light: Locate the control knob. Push and turn the knob to the "PILOT" position. Hold it down for approximately 30-60 seconds to allow gas to flow to the pilot.
- Ignite Pilot: While holding the knob down, press the Piezo igniter button repeatedly until the pilot flame ignites. Continue to hold the control knob down for another 30 seconds after ignition to ensure the thermocouple is heated.
- Main Burner: Slowly release the control knob. If the pilot remains lit, turn the knob to the desired heat setting (e.g., "LOW" to "HIGH"). The main burners will ignite.
- Thermostatic Control: For thermostatic operation, set the control knob to the desired temperature. The stove will cycle on and off automatically to maintain this temperature.
Shut-Down Procedure:
- Temporary Shut-off: To temporarily turn off the main burners while keeping the pilot lit, turn the control knob to the "PILOT" position.
- Complete Shut-off: To completely turn off the stove, turn the control knob to the "OFF" position and close the main gas supply valve.

Image: The gas stove operating, with bright, realistic flames emanating from the ceramic logs, providing both warmth and visual ambiance.
5. Maintenance
Regular maintenance ensures the safe and efficient operation of your Duluth Forge Ventless Liquid Propane Gas Stove. Always ensure the unit is completely cool and the gas supply is turned off before performing any maintenance.
Recommended Maintenance:
- Cleaning: Periodically clean the exterior surfaces with a soft, damp cloth. Do not use abrasive cleaners. The vent-free design means no chimney cleaning is required.
- Pilot and Burner Inspection: Annually inspect the pilot and main burners for any obstructions or signs of wear. Ensure the flame is blue and steady.
- Log Inspection: Check the ceramic logs for any cracks or deterioration. Replace if necessary to maintain optimal performance and appearance.
- Gas Connections: Periodically check all gas connections for leaks using a leak detection solution.
- Professional Service: It is recommended to have the unit inspected and serviced by a qualified gas appliance technician at least once a year.
6. Troubleshooting
If you encounter issues with your Duluth Forge Ventless Liquid Propane Gas Stove, refer to the following common troubleshooting steps. For persistent problems, contact a qualified service technician.
Common Issues and Solutions:
- Pilot light will not stay lit:
- Ensure the control knob is held down long enough (30-60 seconds) after ignition to heat the thermocouple.
- Check for adequate gas supply.
- Inspect the pilot assembly for dirt or obstructions.
- Main burner will not ignite:
- Verify the pilot light is lit and strong.
- Ensure the control knob is turned past the "PILOT" position to a heat setting.
- Check for obstructions in the main burner ports.
- Unit shuts off unexpectedly:
- The Oxygen Depletion Sensor (O.D.S.) may have activated due to low oxygen levels. Ensure proper ventilation.
- Check for proper gas pressure.
- Ensure the unit is not overheating due to blocked air circulation.
- Unusual odors:
- A slight odor may be present during initial use as manufacturing oils burn off.
- If a strong gas odor is detected, immediately turn off the gas supply and ventilate the area. Do not operate the unit. Contact a professional.
7. Specifications
| Feature | Detail |
|---|---|
| Brand | Duluth Forge |
| Model Number | QSL250T |
| Heat Output | 25,000 British Thermal Units |
| Heating Area | Up to 1,100 sq. ft. |
| Fuel Type | Liquid Propane |
| Ventilation Type | Vent Free |
| Efficiency | 99.9% |
| Control Type | Thermostatic Control |
| Ignition Type | Battery-assisted Piezo |
| Material | Metal |
| Color | Black |
| Product Dimensions | 25 4/5” H x 32 1/4” W x 13” D (65.5cm H x 81.9cm W x 33cm D) |
| Product Weight | 56.5 lbs (25.6 kg) |
| Assembly Required | Yes |
| Included Components | Fireplace Stove, 5 Hand Painted Ceramic Fiber Logs |
8. Warranty Information
This Duluth Forge Ventless Liquid Propane Gas Stove comes with a 1-year limited warranty. For specific details regarding coverage, terms, and conditions, please refer to the warranty card included with your product or contact Duluth Forge customer support.
9. Customer Support
For technical assistance, replacement parts, or any questions regarding your Duluth Forge Ventless Liquid Propane Gas Stove, please contact the manufacturer's customer support. Refer to the product packaging or the full manual for contact details.
You can also visit the Duluth Forge Store on Amazon for additional product information and accessories.





