An oil-fired thermic fluid heater with a capacity of 200,000 kcal/hr is a heating system that uses oil as a fuel source to heat a heat transfer fluid, such as thermal oil, which is circulated through the system to transfer heat to the end application. The heater system consists of a combustion chamber where oil is burned to generate heat, a heat exchanger that transfers the heat generated to the heat transfer fluid, and a circulation pump that circulates the fluid through the system.