A safe distance from a baseboard heater will depend on the type and size of the heater you are using. In general, it is recommended to keep flammable materials, such as curtains, bedding, and clothing, at least 3 feet away from a baseboard heater to prevent fires. It is also a good idea to keep furniture and other objects at least 1 foot away from the heater to allow for good air circulation and to prevent overheating.
Additionally, it is important to make sure that baseboard heaters are placed on the floor and not on tables or other furniture. This can help to prevent accidents and ensure that the heaters are used safely. It is always a good idea to read and follow the instructions for your baseboard heater and to make sure that it is installed and used properly to avoid any potential hazards.