Mixing is recognized to have a significant impact on reburning performance. Current approaches to represent mixing range in complexity from distributed addition of reagents to three-dimensional computational fluid-dynamics modeling. This work demonstrates that an approach that combines rc burning chemistry with a distributed addition of reagents in the mixing area can be used to describe the main features of reburning. The characteristic feature of the model is utilization of the integrated approach to describe the reburning process. This approach includes: (1) evaluation of mixing characteristics of the combustion facility under investigation by using a single jet in doss-flow or CFD modeling: (2) utilization of plug now reactors to describe processes that occur in the boiler; (3) the distributed addition of reagents; and (4) the inverse-mixing approach. The model is validated against experimental data obtained in five combustion facilities ranging in scale from bench-to large pilot-scale.