Proovers or Proofing Cabinets from the National Catering Equipment - all for commercial use. All Proovers or Proofing Cabinets are designed for use in commercial kitchens and foodservice environments. Browse our Proovers or Proofing Cabinets below, or use the categories on the left hand side to navigate, or use the search bar above to enter a specific product code or product name.