Dry mortar industry – Energy savings ! Tema Fluid bed dryer/ cooler: The drying air supply temperature and the product exit temperature are maintained at constant, economical levels, resulting in lower energy costs. The cooler area normally represents about half the size of the unit, and in the dry mortar industry cooling is usually required. The exhaust from the cooler area can be recycled to the dryer area so that excess heat energy in the product is reclaimed in the dryer. A fluid-bed dryer/cooler will always be smaller for a given throughput than a rotary drum installation.