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    Kitchen Exhaust Hoods: Inspect Every 6 Months

    By John Wilmowski

    Your job is to replace the kitchen suppression system links every six months, but chances are, nobody is inspecting the hood. While on the service call, why not add a hood inspection and increase revenue?The exhaust hood is a steel canopy located directly over the cooking appliances and is sized and configured to remove grease-laden vapors. The seams, joints, and any penetrations of the hood enclosure must have a liquid- tight, continuous external weld or listed adapters providing an equivalent seal so the grease doesn’t escape. The filter support frames attached inside the hood are welded or sealed, so they are grease-tight. All penetrations are required to be sealed by welding or listed devices, such as Seal-Fast Hood Adapters. All these features ensure grease stays within the hood and doesn’t become a safety concern.The hood is also where the grease removal devices are located. Only grease filters that are listed for use with commercial cooking operations are permitted in the hood. Listed filters are constructed of non-combustible material, such as steel or aluminum, and are of rigid construction that will not distort or crush during normal operation, handling, and cleaning. The filters are installed on runners that are typically at least a 45-degree angle from the horizontal. Gaps beside filters are filled with filter spacers to ensure proper air flow. This design allows exhaust gases to pass through the grease filters while permitting easy access for removal of the filters.Hoods are typically constructed so the grease filters only fit one way. The filters are intended to direct the grease toward a grease drip tray, located at the lower edge of the filters. The drip tray collects grease and is sized relative to the hood and filters. Grease drip trays are sloped to drain grease into metal containers that are typically one gallon or less and are emptied periodically. Removing the grease reduces the fire hazard.

      Grease Filters Missing or Damaged Replace
      Grease Filter Spacers Missing or Damaged Replace
      Filter Locking Handles Missing or Bent Replace
      Link Brackets Bent or Broken Replace
      Penetrations for Piping and Conduit Not Sealed Install Seal-Fast Adapters
      Other Hood Penetrations Not Sealed Install Seal-Fast Adapters
      Abandoned or Open Penetrations Not Sealed Install Seal-Fast Adapters
      Conduit Fittings Loose or Broken Replace or Tighten
      Conduit Hangers Missing or Loose Replace or Tighten
      Hanger Fasteners Missing or Loose Replace or Tighten*
      Hood Light Fixture No Globe or Cage Replace
      Non-Listed Adapter Not Sealed Replace with Seal-Fast Adapters**

    *Install fasteners using listed Quick Mount fastener installation tool (P/N QMTOOL)
    **Cut new holes in hood using Holecutting System (P/N HCSM or HCSD)

    Inspecting kitchen hoods every six months helps ensure safety for your customers’ kitchens. Each item in the inspection checklist is a safety issue or could become one if left unattended. Download a copy of the Kitchen Hood Inspection Checklist and use it during your next service call to change out links. You’ll be helping your customer improve safety while increasing your revenue.

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