What should I do if there's a smell when I first use the heater?

When first running the heater, there may be an odor, which is normal as the heater has a surface coating on the internal parts. For the first several hours of operation, this coating reacts with the internal parts to permanently protect them. The odor is safe, but if you are sensitive to it, it is recommended to run the heater in a well-ventilated area until the odor dissipates.