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' ' 2 1C4',V1JViC LILL-11V+ continuous may have automatic'crcling controls providing the average flow rate for each hour meeting the requirements of Section N1104.2.1. 39 01 `1 '- c." Equation 11-2: j Continuous ventilation(cfm) = total!ventilation rate/2 N1104.2.1.1 Ventilation rate. The continuous ventilation system shall be balanced in accordance with Section N1104.4.2. Exception: If the local ventilation req k irements according to IRC Section R303.3 are being met by the continuous ventilati 1 system, it shall be capable of operating at a rate not more than 100 percent greater plan required by Section N1104.2.1. N1104.2.2 Intermittent ventilation. The difference between the total ventilation rate and the continuous ventilation rate shall be based on flow rates as designed or as installed. Table N1104.2 Total!and Continuous Ventilation Rates (in cfm) Number of Bedrooms 1 2 i 3 4 5 62. Conditioned space' (in sq. Total/ Total` Total/ Total/ Total/ Total/ ft:) Continuous Continuous Continuous Continuous Continuous Continuous 1000-1500 60/40 75/40` 90/45 105/53 120/60 135/68 1501-2000 70/40 ^85/43 100/50 115/58 130/65 145/73 2001-2500 80/40 95/48 110/55 125/63 140/70 155/78- 2501-3000 55/782501-3000` 90/45 105/53 •v) 135/68 150/75 165/83 3 001-3 500 100/50 115/58r130/65 145173 160/80 175/88 3501-4000 110/55 125/63 140/70 - 155/78 170/85 185/93 4001-4500 120/60 135/68 150/75 165/83 180/90 195/98 4501-5000 130/65 145/73 160/80 175/88 190/95 205/103 5001-5500 140/70 155/78 170/85 185/93 200/100 215/108 5501-60002 150/75 165/83 180/90 195/98 210/105 225/113 ' Conditioned space includes the basement 2 If conditioned space exceeds 4000 sq. Ift, or there are more than 6 bedrooms, use Equation 11-1 from Section N1104.2 to calculate total ventilation rate. Copyright 0200 by the Revisor of Statutes,State of Minnesota.All Rights Reserved.