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33 RESIDENTIAL ENERCY CODE 1322.1IQ4 Equation ]1-1: 'fotal ventilation rate(cfm) _ (0.02 x squsre leet of conditioned space) + [15 x (number of bedrooms+ I)] i�1104.2.1 Continuaus��entilalion. A minimum of 50 percent of the total�•entilation ratet but nol less than 40 cfm, sha}I be provided, on a conlinuous rate average for each one-hour period according to Tab)e N]J 04.2 or Equation ))-2. The p�rtion of the mechanical ventifalion system that is intended to be coniinuous may have automavc cycling controls providing the average Bow rale for each hour meeting the requirements of Section N I]04.2.]. Equation ]1-2: Caniinuous ventilation (cfm) = total ventilation raiel2 N]104.2.1.1 Ventilation rate. The conlinuous venti}aiion system shall be balanced in accordance wiih Section N1104.4.2. Exception: Jf the Ioca1 ventilation requiremenis according ia iRC Section R303.3 are being met by the continuous ventilation system, it sha11 be capable of operating at a rate not more than 100 percent greater 2han required by 5ection N 1]04.2.]. NI�04.2.2 ]ntermittent venlilation. The difference betv��een the ��tal ventilation rate and the continuous ventilation rate shall be based on flow•rates as designed or as installed. Table \1 l 04.2 Total and Cantinuous Ventilation Rates (in cfm) Number af Bcdrooms � 2 3 �1 j �2 Conditioned space' (in sq. Total: Total/ Total/ Totall Total! Totai; ft.l Continuous Continuous Continuous Continuaus Continuous Conlinuous 1Q00-150Q 60/40 75/40 90/45 IOSl53 120/60 135/68 1501-2D00 70,'40 85l43 100/50 }15/58 ]30/65 I45C13 2001-2540 80,'40 95146 I10/55 125/63 140!70 ]55/78 ZSOI-3004 90/45 l05/53 120J60 )35168 150/75 )65/83 30b}-3500 100/50 l I 5/58 130/65 1 3 160l80 175/68 �3501-4000 110155 ]25I63 140/')p 155/78 170185 185/93 Copyright m20D9 by the Revisor of tiistules, State oTMinnesota All Righ�s Resen•ed.