Nestler NTH series Thermic Fluid Heaters are offered in capacities ranging from 1 lac kcal/hour to 30 lac kcal/hour. They employ a 3-pass design with high efficiency, having one radiant and three consecutive heat transfer areas, thus eliminating the need of an economiser. The design includes a double-walled (2-shell) construction that provides for insulation as well as the pre-heating of air, thereby aiding combustion. Nestler Thermic Fluid Heaters offer benefits of high coil heat transfer area and a high furnace volume that results in a longer life for the thermic fluid since degradation does not occur.