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GENERAL INFORMATION LISTINGS: Metal-Fab Model IPIC Grease Ducts are listed by Underwriters Laboratories, Inc. (UL File No. MH8251) and are intended to be assembled in accor- dance with these following installation instructions and installed to meet the requirements of the National Fire Protection Association (NFPA) "Standard for the Installation of Equipment for the Removal of Smoke and Grease-Laden Vapors from Commercial Cooking Equipment." Metal-Fab Model IPIC Series 4G Grease Duct (6" thru 36" diameter) has been evaluated by SBCCI PST & ESI report no 9666, ICBO ES report no. 5301 and BOCA ES report no. 9637 for use as an alternative to a two hour fire rated shaft enclosure when installed in accordance with these installation instructions and National Fire Protection Association (NFPA 96), "Standard for Ventilation Control and Fire Protection of Commercial Cooking Operations". Model IPIC Series 4G Grease Duct is compliant with BOCA National Building Code, International Mechanicat Code, Standard Building Code Standard Mechanical Code and the IC80 Uniform Mechanical Code and International Mechanical Code. Construction details are per UL File MH8251 for duct assem- biy and suppo~ts and R15388 for Through Penetrating Products Firestop through 24" diameter and further tested in accordance to ASTM E814 through 36" diameter. Testing performed as prescribed by ICBO AC121, including zero clearance fire test, ASTM E119-88, "Fire Tests of Building Construction, Materials and ASTM E814, "Tests of Through Penetration Firestops". APPLICATION: Grease Ducts are suitable for use in commercial installations using exhaust system components for the removai of smoke and grease-laden vapors. System installation specifications are as described in the National Fire Protection Association No. 96. Grease duct systems must be installed to conform to these instailation instructions. Grease Duct systems are not to be interconnected with any other building ventilation or exhaust system. Model IPIC Series 4G Grease Ducts may be installed without requiring a fire-rated enclosure when installed in accordance with a Through-Penetration Firestop, CAJ7006, described in UL's Fire Resistance Directory through 24" diameter and further tested in accordance to ASTM E814 through 36" diameter. GREASE DUCT INSTALLATIONS REQUIRE PROVISIONS FOR CLEANING THE INTERIOR OF THE DUCT. NFPA 96 CLEANOUT REQUIREMENTS ARE AS FOLLOWS: 1. A cleanout must be provided at each change of direction except were the entire length of the duct can be inspected and cleaned from either the hood or the discharge end. 2. On horizontal duct runs, at least one (1) 20" (508) diameter opening must be provided. Where the duct is smaller than 20" (508) diameter, openings large enough to permit cleaning at intervals of no more than 12' (3.66m) are required. 3. Openings may be at the side or the top of the duct whichever is more accessible. When the opening is on the side of the duct, the lower edge of the opening must be at least 1 1/2" (38) above the bottom OD of the duct. For Mode~ IPIC Grease Duct, this is accomplished by the use of the Grease Manifold Tee(IPICGM~ and the Cieanout Cap (IPICTCN) 4. On vertical duct where personnel entry is possible, access must be from the top of the riser. Where entry is rot possible, access must be provided at each floor. System size and capacity information can be obtained from: (1) Chapter 31, ASHRAE Handbook "Fundamentals Vol.," or (2) Chapter 3, "Air Pollution Engineering manual of the U.S. Environmental Protection Agency." 1973. GREASE DUCT ENVIRONMENT: Model IPIC Series 4G Grease Ducts are intended for use in either noncombustible or combustible surroundings. This Grease Duct System is not to be fully enclosed with combustible material. The duct instailation shall be per NFPA96 Standard for Ventilation Control and Fire Protection of Commercial Cooking Operations, or other local codes. Duct systems serving a Type I hood shall be constructed and installed so that grease cannot collect in any portion thereof. The duct system shall slope no less then 3" vertical in 100ft. horizontal toward the hood or toward an approved grease reservoir. ' When a duct 36 inches or smaller penetrates a 6re-rated ceiling, wall or floor, they shall be protected with a Through-Penetration Firestop Protection System equivalent to the fire-resistance rating of the assembly being penetrated (Model PIC PPK). For ducts 6" through 36" diameter, as specified in listing section above, additional enclosure may not be required. Consult local code authority. This duct Through-Penetration Firestop protection System shali be installed in accordance with the conditions of the classification and the manufac- turer's instructions, and shall be acceptable to the authority having jurisdiction (See Figure 45). CLEARANCES: Model IPIC Series 4G Grease Ducts have been tested and approved for zero clearance to combustibles as per ICBO acceptance criteria AC21 (Ref. ICBO repo~t no. 5301) and also evaluated by BOCA Report No. 96-37 and SBCCI Report No. 9666 as a method for reducing required clearances to com- bustible materials to zero when constructed in accordance with the reports and the installa6on instructions. This Grease Duct System is not to be fully en- closed with combustible materiai.The installation of the grease duct must comply with the installation requirements of the NFPA Standard of Ventilation Con- trol and Fire Protection of Commercial Cooking Operations, NFPA 96. NOTE: Dimensions in these instructions are in American Standard (feet and,inches), with metric (mm) in parenthesis uniess stated otherwise.