The customer clearly stated that they needed a large-scale steam boiler suitable for food processing, which must meet the requirements of cleanliness, stable pressure and high efficiency. Combined with the local fuel supply situation in Afghanistan, after comparing our two main types of boilers, our company recommended the more suitable oil-gas fired steam boiler — this boiler has the advantages of high thermal efficiency, simple operation and no need for a large area for fuel storage. Although the biomass boiler has the advantage of low fuel cost, it has higher requirements for fuel storage and site space, so it is not the optimal choice for the customer.