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NFPA 96

NFPA 96 Standard for Ventilation Control and Fire Protection of Commercial Cooking Operations 2008 Edition. Some Items That Can Be Affected by Kitchen Ventilation. Air conditioning Fire safety Ventilation/air distribution Refrigeration and food service equipment.

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NFPA 96

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  1. NFPA 96 Standard for Ventilation Control and Fire Protection of Commercial Cooking Operations 2008 Edition

  2. Some Items That Can Be Affected byKitchen Ventilation Air conditioning Fire safety Ventilation/air distribution Refrigeration and food service equipment

  3. Buildings Where Kitchen Ventilation Could Be Found. Restaurants Hotels Hospitals Retail malls Correctional facilities Single and multi-family dwellings

  4. Reasons for Kitchen Ventilation Systems Main Reason • Capture, contain and evacuate heat, smoke, odor, grease vapor and other contaminates generated by the cooking process.

  5. Reasons for Kitchen Ventilation Systems Secondary Reasons • Provide comfortable environment in the kitchen. • Enhance health and safety of personnel working in the kitchen and other building occupants.

  6. Reasons for UL Listed Exhaust Hoods Safety • Fire Containment and Prevention • Electrical Components • Materials Performance • Min. Exhaust Air Flow • Max. Supply Air Flow

  7. NFPA 96Grease Removal Devices • Grease Removal Devices • Listed grease filters, baffles, or other approved grease removal devices shall be provided • Listed filters shall be tested in accordance with UL 1046 • Mesh filters shall not be used NFPA 96 6.1 2008

  8. Baffle Filter Series of vertical baffles Usually constructed of aluminum or stainless steel Cleaned by dishwasher or by soaking and rinsing NFPA 96 requires grease filters to be listed under UL 1046 Mesh filters do not meet the requirements of 1046 Type I-Filter Style

  9. Removable Extractor Part of a UL Listed Hood Series of horizontal baffles Usually constructed of stainless steel Cleaned by dishwasher or by soaking andrinsing. Type I-Filter Style

  10. NFPA 96Grease Removal Devices • Filters (UL 1046) • Baffle • Waterwash • Mesh filters shall not be used NFPA 96 6.1 2008

  11. NFPA 96Grease Removal Devices • Filters • Shall be listed and constructed of steel or listed equivalent material • Shall be of rigid construction that will not distort or crush under normal operation • Grease filters shall be arranged so that all exhaust air passes through the grease filters. NFPA 96 6.2.3.1, .2 & .3 2008

  12. NFPA 96Grease Removal Devices • Filters • Grease filters shall be easily accessible and removable for cleaning. • Grease filters shall be installed at an angle not less than 45 degrees from the horizontal. NFPA 96 6.2.3.4 & .5 2008

  13. NFPA 96Grease Removal Devices • Filters • Shall be installed at an angle not less than 45 degrees from the horizontal NFPA 96 6.2.3.5 2008

  14. Distance between the grease removal device and the cooking surface shall be as great as possible but not less than 18” NOTE NFPA 96 6.2.1.3 For cooking equipment without exposed flame and where flue gases bypass grease removal devices, the minimum vertical distance shall be permitted to be reduced to not less than 6 in. NFPA 96Grease Removal Devices Installation NFPA 96 6.2.1.1 2008

  15. Distance between charcoal or charcoal-type broilers, including gas or electric char broiler a minimum vertical distance of 48” shall be maintained between the lower edge of the filter and the cooking surface. NOTE NFPA 96 6.2.1.4 Grease removal devices supplied as part of a listed hood assemblies shall be installed in accordance with the terms of the listing and the manufacturer’s instructions. NFPA 96Grease Removal Devices Installation NFPA 96 6.2.1.1 2008

  16. NFPA 96Grease Removal Devices • Protection • Grease removal devices shall be protected from combustion gas outlets and from direct flame impingement occurring during the normal operation of cooking appliances producing high flue gas temperatures where the distance between the grease removal device and the appliance flue outlet is less than 18 in. NFPA 96 6.2.2.1 2008

  17. NFPA 96Grease Removal Devices For distances less than 18” a steel baffle plate is required to be installed • The baffle plate shall be sized and located so that flames or combustion gases shall travel a distance of not less than 18 inches • The baffle plate shall be constructed of steel stainless or steel material. NFPA 96 6.2.2.2 & .3 2008

  18. NFPA 96Grease Removal Devices • Filters • Shall be equipped with a drip tray beneath their lower edges NFPA 96 6.2.4.1 2008

  19. NFPA 96Grease Removal Devices • Grease Drip Trays • The tray shall be kept to the minimum size needed to collect grease and • shall be pitched to drain into an enclosed metal container having a capacity not exceeding one gallon NFPA 96 6.2.4.2 & .3 2008

  20. NFPA 96Grease Removal Devices • Grease Filters Orientation • Grease filters that require a specific orientation to drain grease shall be clearly so designated, or……. Directional Arrows On Filters NFPA 96 6.2.5 2008

  21. NFPA 96Grease Removal Devices …The hood shall be constructed so that filters cannot be installed in the Wrong Orientation NFPA 96 6.2.5 2008

  22. NFPA 96Grease Removal Devices • Grease Filters • Extracted grease drains down the filters to the holes in the bottom Drain Holes

  23. NFPA 96Grease Removal Devices • Filters • Missing filters allow grease to enter the duct and plenum

  24. NFPA 96Hoods and Ducts Duct Systems

  25. NFPA 96Duct Systems • General • Cooking equipment used in processes producing smoke or grease-laden vapors shall be equipped with an exhaust system NFPA 96 4.1.1 2008

  26. NFPA 96Duct Systems • General • Ducts shall not pass through fire walls. • All ducts shall lead directly to the exterior of the building, so as not to unduly increase any fire hazard. NFPA 96 7.1.1 & .2 2008

  27. NFPA 96Duct Systems • General • Duct systems shall not be interconnected with any other building ventilation or exhaust system. NFPA 96 7.1.3 2008

  28. NFPA 96Duct Systems • General • All ducts shall be installed without forming dips or traps that might collect residues. NFPA 96 7.1.4 2008

  29. NFPA 96Openings/Clean-Outs • Openings/Clean-Outs • Openings shall be provided at the sides or at the top of the duct, whichever is more accessible, and at changes of direction • Openings shall be protected by approved access panels in accordance with the requirements of 7.4.4 NFPA 96 7.3.1 & .2 2008

  30. NFPA 96Openings/Clean-Outs • Openings/Clean-Outs NFPA 96 7.4.4 Protection of Openings Openings for the installation, servicing and inspection of listed fire protection system devices and for duct cleaning shall be provided in ducts and enclosures. NFPA 96 7.4.4.1 2008

  31. NFPA 96Openings/Clean-Outs • Openings • Enclosure openings required to reach access panels in the ductwork shall be large enough for the removal of the access panel NFPA 96 7.4.4.2 2008

  32. NFPA 96Openings/Clean-Outs • Clean-Outs • A sign shall be placed on all access panels stating the following ACCESS PANEL DO NOT OBSTRUCT NFPA 96 7.1.6 2008

  33. NFPA 96Openings/Clean-Outs • Listed grease duct shall be installed in accordance with the terms of the listing and the manufacturer’s instructions • Listed grease duct access door assemblies (access panels) shall be installed in accordance with the terms of the listing and the manufacturer’s instructions. NFPA 96 7.1.7 & 96 7.4.3.4 2008

  34. NFPA 96Openings/Clean-Outs • Access Panels • Access panels shall be of the same material and thickness as the duct • Access panels shall have a gasket or sealant that is rated for 1500° F and shall be greasetight NFPA 96 7.4.3.1 & .2 2008

  35. NFPA 96Openings/Clean-Outs • Access Panels • Fasteners, such as bolts, weld studs, latches, or wing nuts, used to secure the access panels shall be carbon steel or stainless steel and shall not penetrate duct walls NFPA 96 7.4.3.3 2008

  36. NFPA 96 Standard for Ventilation Control and Fire Protection of Commercial Cooking Operations 2008 Edition Non-combustible Material A substance that will not ignite and burn when subjected to a fire. Combustible Material Any material that will burn regardless of its auto-ignition temperature NFPA 96 3.3.36.1 & .3 2008

  37. NFPA 96 Standard for Ventilation Control and Fire Protection of Commercial Cooking Operations 2008 Edition Limited-combustible Material Refers to a building construction material not complying with the definition of noncombustible material that, in the form in which it is used, has a potential heat value not exceeding 3500 BTU/LB, where tested in accordance with NFPA 259 and includes (1) materials having a structural base of non combustible material, with a surfacing not exceeding a thickness of 1/8” that has a flame spread index not greater than ……. NFPA 96 3.3.36.2 2008

  38. NFPA 96 Standard for Ventilation Control and Fire Protection of Commercial Cooking Operations 2008 Edition Limited-combustible Material 50; and (2) materials, in the form and thickness used, other than as described in (1), having neither a flame spread index greater than 25 nor evidence of continued progressive combustion, and of such composition that surfaces that would be exposed by cutting through the material on any plane would have neither a flame spread index greater than 25 nor evidence of continued progressive combustion. NFPA 96 3.3.36.2 2008

  39. NFPA 96 Standard for Ventilation Control and Fire Protection of Commercial Cooking Operations 2008 Edition NFPA 96 2008 edition move the info on the next few slides from the body of the 2004 edition into the Annex A.

  40. NFPA 96 Standard for Ventilation Control and Fire Protection of Commercial Cooking Operations 2008 Edition Examples of Non-combustible Wall Assembly • Brick, Clay Tile, or Concrete Masonry Products • Plaster, Ceramic or Quarry Tile on Brick • Plaster on Metal Lath on Metal Studs NFPA 96 2008 Annex A.3.3.36

  41. NFPA 96 Standard for Ventilation Control and Fire Protection of Commercial Cooking Operations 2008 Edition Examples of Limited-Combustible Wall Assembly • Gypsum Board on Metal Studs • Solid Gypsum Board • 2 in. or 2 1/4 in. thick, are described in the Fire Resistance Design Manual published by the Gypsum Association, Washington, D.C. NFPA 96 2008 Annex A.3.3.36

  42. NFPA 96 Standard for Ventilation Control and Fire Protection of Commercial Cooking Operations 2008 Edition Examples of Combustible Wall Assembly • Plaster on Wood or Metal Lath on Wood • Gypsum Board on Wood Joist • Gypsum Board on Wood Studs • Plywood or Wood Sheeting on Wood or Metal Studs NFPA 96 2008 Annex A.3.3.36

  43. Where enclosures are not required, hoods, grease removal devices, exhaust fans, and ducts shall have a clearance of at least: 18” to Combustible Material 3” to Limited Combustible 0” to Non-Combustible NFPA 96 Standard for Ventilation Control and Fire Protection of Commercial Cooking Operations 2008 Edition NFPA 96 2008 Annex A Figure A.4.2(e)

  44. Where 28 Gauge sheet metal spaced out 1in. on noncombustible spacers off of combustible material is provided there shall be a minimum of 9” clearance to combustible material is allowed. Clearance to Reduction NFPA 96 2008 Annex A.3.3.36

  45. combustible 9” 28 Gauge Duct 9” 9” 9” 1” air space combustible Nail or screw 1” spacers 18” 28 gauge sheet metal 18” Duct combustible combustible 1” spacers 18” 28 gauge sheet metal 18” NFPA 96 Clearances

  46. Where 22 Gauge Sheet Metal on 1 in. Mineral Wool Bats or Ceramic Fiber Blanket Reinforced with Wire Mesh or Equivalent, Spaced out 1 in. on noncombustible spacers is provided a minimum of 3in. clearance to combustible material is allowed. Clearance to Reduction NFPA 96 2008 Annex A.3.3.36

  47. Mineral Wool 3” Combustible material 3” Mineral Wool Duct Duct Combustible material Combustible material Combustible material 1” 18” Mineral Wool 22-gauge 22-gauge 1 Spacer Mineral Wool NFPA 96 Clearances

  48. Zero clearance to limited-combustible materials shall be permitted where protected by metal lath and plaster, ceramic tile, quarry tile, other noncombustible materials or assembly of noncombustible materials, or materials and products that are listed for the purpose of reducing clearance. Clearance to Reduction

  49. NFPA 96Duct Construction/Installation • Duct Construction • Ducts shallbe constructed of and supported by carbon steel not less than • 16 gauge Steel /Galvanized steel or • 18 Gauge stainless steel NFPA 96 7.5.1.1 2008

  50. NFPA 96Duct Construction • Installation • All seams, joints, penetrations, and hood-to-duct collar connectionsShall have a liquid tight continuous external weld. NFPA 96 7.5.2.1 2008

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