A high-efficiency steam boiler for sterilizing mushroom propagation bags uses a steam drum with 3 tube bundles, enhanced by stainless steel sheets and fins to maximize heat transfer. Positioned atop a biomass-fueled stove, it operates at 3 bars and 150°C, ensuring effective sterilization. ACF tubes boost performance, enhancing fluid mixing and contact area. Successfully implemented in multiple provinces, it offers efficiency, adaptability, and potential for agricultural innovation.