The ICAVI Thermal Fluid Heater (IAFT) aims to meet the demand for using biomass burning to heat thermal fluids, operating at high temperature ranges, with high thermal efficiency and low operating costs. This equipment provides heat to the thermal oil (mineral or synthetic) transferring thermal energy to the industrial process, with the great advantage of thermal stability and the burning of fuels with a high degree of humidity and with the objective of providing security to meet peaks of production, thus ensuring the expected efficiency throughout the entire period of operation.