Does the water heater use the quartz tube heating to have the side effect to the human body?
If it is radiation heating other things, in some applications, the infrared radiation of quartz tube has advantages
But I think the electrothermal film is better, the heat transfer of quartz is slow, the price will be expensive, and the quartz tube has no advantage in the use of heating water.
Harm is hate small, without any side effects!
