-A convection style direct fired heater offers the user the benefits of a direct fired heater, while eliminating some of the drawbacks associated with radiant heat transfer.

-Radiant heat transfer can be undesirable in certain temperature sensitive applications, as radiant heat transfer tends to be more intense and unevenly distributed around the coil surface.

-Sigma Thermal's convection style direct fired heater utilizes a separate combustion chamber and flue gas recirculation to reduce combustion chamber temperatures to 1,400F, thereby minimizing the impact of radiant heat transfer to the process coil.

-Row by Row Sizing Method : Allows for accurate prediction and precise control of heat flux and film temperatures on each individual tube row.

-Coil Configuration Flexibility : Coil flow path and metallurgy are engineered for each customer’s process requirements. Extensive experience in process coil design for multi-phase fluids, viscous hydrocarbons, suspended solids, and various gaseous mixtures.

-Fuel Source Flexibility : Standard or engineered burner configurations for use with both traditional and alternative fuel sources. BACT burners available to meet all emission requirements. (i.e. Low NOx)

-Efficiency : Base efficiencies can exceed 90% (LHV Basis) depending on process inlet temperature, and with an optional economizer can exceed 93% (LHV basis).

-Advanced Control Systems : Complete control systems engineered to optimize system safety and performance. Simple to operate and cost effective standard panels, with full process automation and PLC based combustion control / BMS as available options.