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� <br /> Directions-In order to determine the makeup air,Table 501.4.1 must be filled out(see below).For most new installations,column A will be appropriate,however,if <br /> atmospherically ve�ted appliances or solid fuel appliances are installed,use the appropriate column. Please note,'rfthe makeup air quantity is negative,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.Transfer the cfm,size of opening a�d 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-pitances assisted applianca 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 appliantes fuel appliance or solid fuel appliances <br /> Column D <br /> Column A Column B Column C <br /> 1• 0.15 0.09 0.06 0.03 <br /> a)pressure fador <br /> 1�/sfl <br /> b)conditioned floor area(s�(including 5540 <br /> unfinished basements) <br /> Estimated House Infiltration(cfm):(la g31 <br /> x 1b] <br /> 2.ExhaustCapaaty <br /> a)continuous exhaustronly ventilation system E RV=O <br /> (cfm�;(not applicable to ba-lanced ventilation <br /> systems such as HRV) <br /> b)clothes dryer(cfm) 135 135 135 135 <br /> c)8096 of largest exhaust rati�g(cfm); <br /> KRchen hood typically '�,[�O <br /> (not applicable if recirculating system or if <br /> powered makeup air is electriwlly interlocked <br /> d)80%of nezt IargesT exhaust rating NOt <br /> (cfm);bath fan typicalry Applicable <br /> (not applicable if recirculating system or if <br /> powered makeup air is elechically interlocked <br /> Total Exhaust Capacity(cfm�; 375 <br /> [2a+2b+2c+2d] <br /> 3.Makeup Air Quantity(dm) ��c <br /> a)toUl exhaust capacity(from above) J <br /> b)estimated house infiltretion(from g31 <br /> above) <br /> Makeup Air Quantity(cfm); <br /> [3a-3b] -456 <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 vent and direM vent <br /> appliances may be used.) <br /> B.Use tfiis column if there is one fan-assisted appliance per venting system.(Appliances other than atrnospherically vented appliances may also be included.) <br /> C.Use this column ff 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 if there are muttiple atmospherically vented gas or oil apptiances using a common vmt or'rf there are atrnospherically vented gas or oil appliances and solid <br /> fule appliances. <br />