These requirements cover the following recirculating systems rated 600 volts or less and intended for indoor use: a) Non-integral recirculating systems for installation in commercial establishments for the preparation of food; b) Electric commercial cooking appliances provided with integral recirculating systems intended for installation in commercial establishments for the preparation of food; and c) Vending machines provided with integral recirculating systems. These devices incorporate an air filtering system enclosed in a hooded or otherwise contained area intended to capture air from the cooking process area. The hood assembly typically includes a fan@ collection hood@ or equivalent design and an air filtering system (consisting of a grease filter with or without other filtering means). In addition@ except as noted in the Exceptions to 37.1 and 38.1@ the hood assembly includes a fire actuated damper@ and a fire extinguishing system. Recirculating systems covered by these requirements are intended for installation in accordance with: a) The Standard for Ventilation Control and Fire Protection of Commercial Cooking Operations@ NFPA 96; b) The National Electrical Code@ ANSI/NFPA 70; and c) Other codes such as the International Mechanical Code (IMC)@ and the Uniform Mechanical Code (UMC). Integral recirculating systems shall comply with the requirements for the cooking appliance as noted below@ except as modified or superseded by the requirements in this Standard. a) Commercial electric cooking appliances shall comply with the requirements in the Standard for Commercial Electric Cooking Appliances@ UL 197. b) Vending machines shall comply with the requirements in the Standard for Vending Machines@ UL 751.