Cooling Tunnels Potential Design, Inc. designs, fabricates, and installs high capacity, forced convection stainless steel cooling tunnels for the chocolate industry. Project Gallery: Home | Custom Conveyance | Rotary Roasters | Storage Silos | Cooling Tunnels | Low Emission Grain/Nut Dryers | Brochure | Contact Us Contactors Licencse # 695804 Website © 2009 Potential Design Inc. All Rights Reserved.