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. � <br /> TABLE 3-1 <br /> MINIMUM SOURCE Sr ECIFIC VENTILATIO�`1 CAPACITY REQUIREMENTS <br /> Bathroems Kitchens <br /> Intermittently Operating 50 cfm 100 cfm <br /> Continuous operation 20 cfm 25 cfm <br /> TABLE 3-2 <br /> VENTILATION RATES FOR ALL GROUP R OCCUPANCIES FOUR STORIES AND LESS' <br /> Minimum and Maximum Ventilation Rates: Cubic Feet Per Minute (CFM) <br /> oor � Bedrooms ...^�=` �"<'#��< -,''�-�.t"�. <br /> �Area,R' � 2�or less � 3 . 4 �� � � 5? "'�%� 6�r '';� ��,a��g� <br /> Min. Max. Min. Max. Min. Max. Min. Max. Min. Max. Min. Max. Min. Max. <br /> �500 50 75 65 98 80 120 95 143 110 165 125 188 140 210 <br /> 500-1000 55 83 7.� 105 85 128 100 150 115 173 130 195 145 218 = <br /> 1001-1500 60 90 75 113 90 135 105 158 120 180 135 203 150 225 <br /> 1501-2000 65 98 80 120 95 143 110 165 125 188 140 210 155 233 <br /> 2001-2500 70 105 85 128 100 150 115 173 130 195 145 218 160 240 <br /> 2501-3C'JO 75 113 90 135 105 158 120 180 �35 203 150 225 165 248 <br /> 30013500 80 120 95 146 110 165 125 188 i40 210 155 233 170 255 <br /> 3501-4000 85 128 100 150 115 173 130 1�5 145 216 160 240 175 263 <br /> 4001-5000 95 143 110 165 125 186 140 210 155 233 170 255 185 278 <br /> 5001-6000 105 158 120 180 135 203 150 225 165 248 180 270 195 293 <br /> G001-7000 115 173 130 195 145 218 160 240 175 263 190 285 205 308 <br /> 7001-8000 125 188 140 210 155 233 170 255 185 278 200 300 215 323 <br /> 8001-9000 135 203 150 225 16`.i 248 180 270 195 293 210 315 225 336 <br /> >9000 145 218 160 240 17:i 263 190 285 205 308 220 330 235 353 <br /> ` For residences ihat exceed S bedrooms, increase tho minimum requirement iisted for 8 bedrooms by an <br /> additional 15 CFM per bedroom. The maximum CFM is equal to 1.5 times the minimum. <br /> TABLE 3-3 <br /> PRE�CRIPTIVE EXHAUST DUCT SfZiNG <br /> Fan Tested CFM Min. Flex Max. Length Min. Smooth Max. Length Maximum <br /> C� 25"W.G. Diameter Feef ` ;; Diameter ' Feei 'Elbows •' <br /> 50 4 inch 25 4 inch 70 3 <br /> 50 5 inch 90 5 inch 100 3 <br /> 50 6 inch iJo Limit 6 inch No Limit 3 <br /> 80 4 inchz NA 4 inch 20 3 <br /> 80 5 inch 15 5 inch 100 3 <br /> 80 6 inch 90 6 inch No Limit 3 <br /> I100 5 inch= NA 5 inch 50 3 , <br />� 100 6 inch 45 6 inch No Limit 3 <br /> 125 6 inch 15 6 inch No Limit 3 <br /> 125 7 i��ch 7C 7 inch No Limit 3 <br /> 1. For each additional elbow subtract 10 feet from lengih. <br /> 2. Flex ducts of this diameter are not permitted with fans of this size <br /> SI1� <br />