Votator's high efficiency and productivity results from a simple concept, heat or cool continuously moving product by providing a large heat transfer surface for a small amount of product in a confined space. Inside a mutator shaft rotates within a tube. The product passes through an annulus formed by the shaft and heat transfer tube. Heating or cooling medium flows in a jacket. The unit is insulated to minimize energy loss and protect personnel. A stainless steel cover protects the insulation. The rotating shaft has blades which continuously scrape product film from the heat transfer tube wall, thereby enhancing heat transfer and agitating the product to produce a homogenous mixture. The unit has a 10HP, 230/460V drive. FOB Lake City, PA.