The first one has been used in automobile painting room, iron plate heating and other industries that need heating and drying, and then the market of health care products has gradually warmed up, and it has been used in health care products. However, with the appearance of plate heaters, tube heaters are gradually eliminated. Because the local temperature of the tube heater is particularly high, it feels uneven when used; Secondly, as the temperature rises, the peak value of its radiation band will become shorter, so what you enjoy is not far infrared but middle infrared, which is not consistent with the infrared band radiated by human body; In addition, its red visible light is dazzling, which is not good for eyes. Therefore, from the perspective of decoration, sheets are better. However, there are also good and bad films, and its emissivity and whether there is electromagnetic radiation have become the criteria for judging good or bad. Finally, the last two you said should be of the same kind, but the last one is called fancy. As long as infrared rays are used as the heat source, they are all far-infrared heating plates or full-spectrum infrared heating plates. Other energy houses, spectrum houses, steaming houses and biological waves are basically just various names.