Tjernlund FB3F Fireplace Blower

The FB3F is designed with a compact 15.25-inch width, 3.75-inch height, and 5-inch depth to accommodate most standard fireplace inserts. We recommend measuring your existing blower cavity before purchasing to ensure it fits comfortably within your specific model's housing.

The pre-wired thermal switch monitors the temperature of your fireplace insert. Once the unit reaches the set range between 90°F and 140°F, the fan automatically engages to circulate heat, and it shuts off once the insert cools down, preventing you from running the fan unnecessarily.

Yes, the unit includes a manual speed control dial. This allows you to fine-tune the airflow to match your heating needs, whether you want a gentle breeze or maximum circulation for a larger room.

The FB3F is designed for straightforward installation, coming pre-wired with the thermal switch and speed control. While it is a DIY-friendly project, you should ensure you are comfortable working with basic electrical components and have adequate clearance in your insert's blower compartment.

This blower provides an airflow of 330 CFM (cubic feet per minute). This is robust enough to significantly improve heat distribution in larger living spaces, helping to push warm air further into the room than natural convection alone.