Polyurethane insulated panels can be used for various applications, such as pre-fabricated steel buildings, warehouse, walk-in cold storages, cleanroom, farm, food processing plant and etc. It require less maintenance than concrete and brick structure; repainting is not required. It is more economical and environmental friendly. DYD Refrigeration Systems, Inc. Head Office located at Unit B 7th flr. DN Corporate Center 1388 Quezon Ave. Brgy. South Triangle, Quezon City.