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Directions-In order to determine the makeup air,Table 501.4.1 must be filled out(see belaw).For most new installations,column A will be appropriate,however,if <br /> atmospherically vented appliances or solid fuel appliances are installed,use the appropriate column. Please note,H the makeup air quanYity is�egaNve,no additional makeup air <br /> will be required for ventilation,if the value is positive refer to Table 501.4.2 and size the opening.Tronsfer the cfm,size of opening and type(round,rectangular,flex or rigid)to <br /> the last line of section D. <br /> Table 501.4.1 <br /> PROCEDURE TO DETERMINE MAKEUP AIR QUANITY FOR EXHAUST EQUIPMENT IN DWELLINGS <br /> Additional combustion air will be re uired for combustion a liances,see KAIR method for calculations <br /> One or multiple power One or muRiple fan- One atmospherically vent Multiple atmospherical- <br /> vent or direct vent ap-pliances assisted appliances and power gas or oil appliance or one solid ly vented gas or oil appliances <br /> or no combus-tion appliances vent or direct vent appliances fuel applia�ce or solid fuel appliances <br /> Column D <br /> Column A Column 8 Column C <br /> 1• 0.15 0.09 0.06 0.03 <br /> a)pressurefactor <br /> (cfm/s� <br /> b)conditioned floor area(sfl(including <br /> unfinished basements) 4068 <br /> Estimated House Infiltretion(cfm):[la 610 <br /> x Sb] <br /> 2.Exhaust Capacity <br /> a)continuous exhaust-only ventilation system E RV = 0 <br /> (cfm);(not applicable to ba-lanced ventilation <br /> systems such as HRV) <br /> b)clothes dryer(cfm) 135 135 135 135 <br /> c)80%of largest exhaust reting(cfm); <br /> Kitchen hood typically 'Z4� <br /> (not applicable if rerirculating system or if <br /> powered makeup air is electrically interlocked <br /> d)80%of nent largest exhaust reting NOt <br /> (cfm);bath fan typiwlly <br /> Applicable <br /> (not applicable if recirculating system or if <br /> powered makeup air is electrically interlocked <br /> Total Exhaust Capacity(cfm); 375 <br /> [2a+2b+2c�2d] <br /> 3.Makeup Air Quantity(cfm) 375 <br /> a)toWl exhaust wpacity(from above) <br /> b)estimated house infiltration(from 610 <br /> above) <br /> Makeup Air Quantity(dm); <br /> [3a-3b] -235 <br /> (ff value is negative,no makeup air is needed) <br /> 4.for makeup Air Opening Sizing,refer NOT REQ. <br /> to Table 501.4.2 <br /> A.Use this column if there are other than fan-assisted or atmospherically vented gas or oil appliance or if there are no combustion appliances.(Power ve�t and direct vent <br /> appliances may be used.) <br /> B.Use this column if there is one fan-assisted appliance per venting system.�Appliances other than atmospherically vented appliances may also be included.) <br /> C.Use this column'rf there is one atmospherically vented(other than fan-assisted)gas or oil appliance per venting system or one solid fuel appliance. <br /> D.Use this column'rf there are multiple atmospherically vented gas or oil appliances using a common vent or if there are atrnosphericalty vented gas or oil appliances and solid <br /> fule appliances. <br />