... :1. counter flow small pellet cooler is mainly to cool 2-8mm dimension biomass pellets, when outlet from ... cold air goes inside of cooler from bottom to top, hot pellets goes to cooler from top to bottom, as time goes on, ... reduce pellet broken , if cold air also go to cooler from top, which same as pellets, then ... more than 6000 sets per year , greatly welcome to ask me for details., we have big discount ...