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EXHAUST SYSTEMS <br /> TABLE M1507.3.3(1) <br /> CONTINUOUS WHOLE-HOUSE MECHANICAL VENTILATION SYSTEM AIRFLOW RATE REQUIREMENTS <br /> DWELLING UNIT NUMBER OF BEDROOMS <br /> FLOOR AREA 0-1 2-3 4-5 6-7 >7 <br /> (square feet) Airflow in CFM <br /> <1,500 30 45 60 75 90 <br /> 1,501-3,000 45 60 75 90 105 <br /> 3,001-4,500 60 75 90 105 120 <br /> 4,501-6,000 75 90 105 120 135 <br /> 6,001-7,500 90 105 120 135 150 <br /> >7,500 105 120 135 150 165 <br /> For SI: 1 square foot=0.0929 m2,1 cubic foot per minute=0.0004719 m3/s. <br /> TABLE M1507.3.3(2) <br /> INTERMITTENT WHOLE-HOUSE MECHANICAL VENTILATION RATE FACTORSa,b <br /> RUN-TIME PERCENTAGE IN EACH 4-HOUR 25% 33% 50% 66% 75% 100% <br /> SEGMENT <br /> Factors 4 3 2 1.5 1.3 1.0 <br /> a. For ventilation system run time values between those given,the factors are permitted to be determined by interpolation. <br /> b. Extrapolation beyond the table is prohibited. <br /> TABLE M1507.4 <br /> M1507.4 Local exhaust rates. Local exhaust systems shall MINIMUM REQUIRED LOCAL EXHAUST RATES FOR <br /> be designed to have the capacity to exhaust the minimum air ONE-AND TWO-FAMILY DWELLINGS <br /> flow rate determined in accordance with Table M1507.4. AREA TO BE EXHAUST RATES <br /> EXHAUSTED <br /> Kitchens 100 cfm intermittent or 25 cfm continuous <br /> Bathrooms-Toilet Mechanical exhaust capacity of 50 cfm <br /> Rooms intermittent or 20 cfm continuous <br /> For SI: 1 cubic foot per minute=0.0004719 m3/s. <br /> (.7 I/ <br /> t y "r <br /> 488 2015 INTERNATIONAL RESIDENTIAL CODE® <br /> INTERNATIONAL CODE CO l!N C I C Copyright C 2014 ICC.ALL RIGHTS RESERVED.Accessed by Jeff Heilman on May 19,2016 4:05:41 PM pursuant to License Agreement with ICC.No further reproduction or <br /> distribution authorized.ANY UNAUTHORIZED REPRODUCTION OR DISTRIBUTION IS A VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE <br /> AGREEMENT,AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER. <br />