A world leader in variable retention time (VRT) and single retention time (SRT) carton tunnels, GEA Intec LLC offers its box-freezer designs and up-fits. Utility savings has been a focused advantage of Intec's systems, versus blast-cells, since its inception in 1980. In furthering that advantage, Intec has developed software which communicates with the systems engine room to modulate power requirements and produce refrigeration only when needed.