1. Introduction
This manual provides comprehensive instructions for the safe and efficient operation, assembly, and maintenance of your oneinmil Electric Fireplace with Mantel. Designed to provide warmth and visual ambiance, this unit features a realistic 3D flame effect and a 1500W heater. Please read all instructions carefully before assembly and use.

Image: The oneinmil Electric Fireplace with Mantel, showcasing its design and flame effect in a home environment.
2. Important Safety Information
To reduce the risk of fire, electric shock, or injury, adhere to the following safety precautions:
- Read all instructions before using this fireplace.
- Do not operate any fireplace with a damaged cord or plug, or if the heater has malfunctioned or been dropped/damaged in any manner.
- Do not use outdoors. This fireplace is intended for indoor use only.
- Avoid placing the power cord under carpeting or covering it with throw rugs, runners, or similar coverings. Arrange the cord away from traffic areas to prevent tripping.
- To disconnect the fireplace, turn controls to the OFF position, then remove the plug from the outlet.
- Always unplug the fireplace when not in use.
- Do not insert or allow foreign objects to enter any ventilation or exhaust opening as this may cause an electric shock or fire, or damage the fireplace.
- This fireplace is hot when in use. To avoid burns, do not let bare skin touch hot surfaces.
- Keep combustible materials, such as furniture, pillows, bedding, papers, clothes, and curtains at least 3 feet (0.9 m) from the front of the fireplace.
- The fireplace is equipped with an overheating protection device that automatically cuts out if the temperature exceeds 80°C. It will restart after cooling down.
3. Package Contents
Your oneinmil Electric Fireplace with Mantel is shipped in two separate packages for safe delivery. Please ensure you have received both packages and all components before beginning assembly.
- Package 1: Mantel components
- Package 2: Electric Fireplace Insert
- Assembly Hardware (screws, dowels, etc.)
- Instruction Manual

Image: Visual representation of the product being delivered in two separate packages, indicating that they may arrive at different times.
4. Assembly Instructions
Assembly of the oneinmil Electric Fireplace with Mantel is designed to be straightforward. Detailed assembly guidelines with illustrated steps are included in your package. It is recommended to have a second person assist with assembly due to the size and weight of the components.
- Unpack all components from both packages and verify against the parts list in the included manual.
- Identify and separate the mantel pieces from the fireplace insert.
- Follow the step-by-step instructions provided in the assembly manual to construct the mantel frame.
- Once the mantel is assembled, carefully insert the electric fireplace unit into the designated opening.
- Secure the fireplace insert according to the manual's instructions.
- Place the assembled unit in its desired location, ensuring it is on a stable, level surface and away from combustible materials.

Image: An exploded view illustrating the ease of assembly, showing the separate fireplace insert and its integration into the mantel structure.
5. Operating Instructions
Your electric fireplace offers both realistic flame effects and a heating function, which can be operated independently.
5.1. Powering On/Off
- Plug the power cord into a standard 120V AC outlet.
- Locate the control panel on the fireplace insert (typically on the top right or front).
- Press the main power button to turn the unit on or off.
5.2. Flame Effect Operation
The 3D realistic flame effect can be enjoyed with or without the heating function.
- Press the flame button on the control panel to activate the flame effect.
- Some models may offer adjustable flame brightness settings. Refer to your specific manual for details.
5.3. Heating Function Operation
The 1500W heater provides efficient warmth for your room. The heater and flame can work separately.
- Press the heater button (often labeled with a fan or heat icon) to turn on the heating element.
- The unit features a 1500W one-touch heating switch.
- Adjust the thermostat (if available) to your desired temperature. The heater will cycle on and off to maintain the set temperature.
- The fireplace operates with low noise, contributing to a quiet and comfortable environment.

Image: The electric fireplace demonstrating its heating capability, with warm air currents illustrated, highlighting that the heater and flame can operate independently.

Image: A child sleeping near the fireplace, illustrating the low-noise operation feature, which contributes to a peaceful environment.
6. Care and Maintenance
Regular maintenance ensures the longevity and optimal performance of your electric fireplace.
- Cleaning: Always unplug the fireplace before cleaning. Use a soft, damp cloth to wipe down the exterior surfaces. Do not use abrasive cleaners or sprays.
- Glass Panel: Clean the glass panel with a soft cloth and a glass cleaner. Do not use abrasive cleaners.
- Ventilation Openings: Keep the ventilation openings clear of dust and debris to ensure proper airflow and prevent overheating. Use a vacuum cleaner with a brush attachment to gently clean these areas.
- Storage: If storing the fireplace for an extended period, unplug it and store it in a dry, dust-free location.
7. Troubleshooting Guide
If you encounter issues with your electric fireplace, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Fireplace does not turn on. | No power to the unit; power switch off; circuit breaker tripped. | Ensure the unit is plugged into a working outlet. Check the main power switch. Reset the household circuit breaker if necessary. |
| No heat output. | Heater switch off; thermostat set too low; overheating protection activated. | Ensure the heater function is turned on. Increase the thermostat setting. If overheating protection activated, unplug the unit, allow it to cool for 15-20 minutes, then plug back in. |
| Flame effect not working. | Flame effect switch off; LED bulb issue. | Ensure the flame effect button is pressed. If the issue persists, contact customer support. |
| Unusual noises. | Dust in fan; loose components. | Unplug the unit and gently clean the fan area. If noise persists or is significant, discontinue use and contact customer support. |
8. Product Specifications
| Feature | Specification |
|---|---|
| Brand | oneinmil |
| Model Name | 43" Electric Fireplac (CB302) |
| Product Dimensions | 13.6"D x 42.5"W x 37.2"H |
| Material | Wood (P2, PB, MDF boards), Cold rolled plate |
| Finish Type | Painted |
| Installation Type | Freestanding |
| Heat Output | 1500 Watt Hours |
| Power Consumption | 1500 Watts |
| Special Feature | Flame Effect, TV Stand |
| Style | Farmhouse |
| Color | White |
| Room Type | Living Room |
| Ventilation Type | Vent Free |
| Item Weight | 80 Pounds |
| UPC | 724156681004 |
9. Warranty and Customer Support
oneinmil is committed to providing quality products and customer satisfaction. While specific warranty details are not provided in the product listing, general support and return policies are typically available.
- Returns: This product typically offers a 30-day easy returns policy. Please refer to your purchase platform's return policy for specific terms and conditions.
- Customer Support: For any questions, concerns, or assistance with assembly, operation, or troubleshooting, please contact oneinmil customer support through the retailer's platform or the contact information provided in your product packaging.