Profile: Imperial Mfg., Inc. offers quality engineered cold storage and insulated structures. The R-Plus Cold Storage Doors are available in two categories- swing and sliding. Door panels are foamed in place poly-urethane injected for the highest insulating values in the industry. Larger doors are built in sections and cam-locked together on site.Super Insulated Structures are specifically engineered for extreme climates. These super insulated structures are equally well suited for the high winds, tropical heat and rains. We also provide Heatcraft refrigeration equipments.