A Mill electric heater heats well. Thanks to the sleek design, the Mill heater matches well with different types of interior. Which Mill electric heater you choose depends on where you place it. You can choose from a freestanding model or a Mill convection heater on the wall. This depends on how large the room is and what you prefer. Some Mill electric heaters have WiFi. That way, you can control the heater via an app. This means your room is always nice and warm.