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Diredions-In order to determine the makeup air,Table 501.4.1 must be fllled aut(see beiow).for most new�insbllatbns,column A will be appropriate,however,ff <br /> atmospherMztly veMed appliances w solid fuel appliances are installed,use the approprfate column. Please�ote,)f the makeup a1r quaMlty is negative,no additla�al makeup afr <br /> wfll be required for ventilatfon,if the value is positive refer to Table 501.4.2 and size the openf�.Tra�der the cfm,size of opening and type(round,recta�gular,flex or rl�id)to <br /> the last tine of section D. <br /> Table 501.4.1 <br /> PROCEDURE TO DETERMINE MAKEUP AIR QUANITY FOR EXHAUST EQUIPMENT IN DWELLINGS <br /> didonal comhustbn alr wfll be re uired for combusGon a Ilanca see KAIR method for cakulatbns <br /> pne w muRipk power One or mukipla fan- One atmospherically vent Multiple atmospherkal- <br /> vent or direct veM ap-pUanca assisted applianca and power gas or oil appflance or one solid ly vented gas or oil applh�a <br /> or no canbu:-Uon appliances vent w dMect vent appllances fuel applience or soUd fuel applfanees <br /> Column D <br /> Cotumn A Column 8 Column C <br /> i• 0.15 0.09 0.06 0.03 <br /> a)presswe factor <br /> (cfm/s� <br /> b)conditioned flqor area(sf�(indudMg �o A Q <br /> unfinished bauments) v�tv <br /> Estimated House InfllVation(cfm):(1a 577 <br /> x lbj <br /> 2.Exhaurt Gpadty <br /> a)continuous exhaustonly ventflatlon system E RV � � <br /> (dm);(not app8wele to ba-lanced ventilatlon <br /> systems sueh u NRV) <br /> b)dotfia dryer(cfm) 135 135 135 135 <br /> c)80%at largest exFwust radr�(cfml; <br /> Krtchm hood typicaly 240 <br /> (not appliable if redreubdry{systam or if <br /> powered mak�p air is electrically interlocked <br /> d)SO%of aext largat exhaust rating NOt <br /> tctm);bacn tan cy��caiy Applicable <br /> (not appliceble if recirculaUna system or if <br /> powered makeup afr Is electrically irrterlaked <br /> Totat Exhaust capacity(cfm); 375 <br /> [2a+�b+2c+2d] <br /> 3.Makeup Air Quantity(cfm) 375 <br /> a)Dotal e�aust apaNty(irom above) <br /> b)estlmated house in8ltretion(from 577 <br /> above) <br /> Makeup AM Quantity(efm); <br /> I3a—3b) _/1 O/1 <br /> (ff vslue Is negative,no makeup air is needed) L L <br /> 4.for makeup Air Opening Sizina,refer <br /> toTab1e501.4.2 NOT REQ. <br /> 0.Use thls column N there are other than fanassisted or atmospherlcatly vented gas or oil appliance or if th�e are no combustion appliarrces.(Power vent and direct vent <br /> applfances may be used.) <br /> 8.Use this wlumn H there Is one fan-assisted appliance per venting system.(Applianca other than atmospherkally vented appllances may also 6e included.) <br /> C.Use this column N there fs one atmospherkally vented(other than fan-assisted)Qas w ofl appliance per venting system or one solid fuel appliance. <br /> D.Use this column if there are multlple atmospheNcally vented gas or al appliancea using a common veM or If�ere are atrnoapherically vented gas or ofl applmnces and solid <br /> fuk appliances. <br />