Thank you for your advice about variability. I am trying to make something similar to a sous vide, were there is two containers, one where there is the heating element and another container were you put a bag with the food. Both containers are connected using tubes and at the beging of them there is a propulsion pump. I know it would be more eficient and better to only use one container but the teacher said we must use two.
Knowing this, could you tell me any heating element models please.