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Direttions-In order to determine the makeup air,Table 501.4.1 must be filled out(see below�.For most new installations,tolumn A will be appropriate,however,if <br /> atmospherically vented appliances or solid fuel appliances are installed,use the appropriate column. Please note,if the makeup air quantity is negative,no additional makeup air <br /> will 6e required for ventilation,if the value is positive refer to Table 501.4.2 and size the opening.Transfer the cfm,size of opening and type(round,rettangular,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 appliances,see KAIR method for calculations) <br /> One or multiple power One or multiple 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 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 factor <br /> (cfm/sf) <br /> b)conditioned floor area(sf�(including 3854 <br /> unfinished basements� <br /> Estimated House Infiltration(cfm):�la 578 <br /> x 16] <br /> 2.Exhaust Capacity <br /> - a)continuous exhaust-only 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)80%of largest exhaust rating(cfm); <br /> Kitchen hood typitally 24� <br /> (not applica6le if recirculating system or if <br /> powered makeup air is electrically interlocked <br /> d)80°6 of next largest exhaust reting NOY <br /> (cfm);bath fan typically App�lCdblf ' <br /> (not applica6le if recirculating system or if <br /> powered makeup air is electrically interlocked <br /> Total Exhaust Capacity(cfm); <br /> [2a+26+2c+2d] 375 <br /> 3.Makeup Air Quantity(cfm) 375 <br /> a)total exhaust capacity(trom above) <br /> b)estimated house infiltration(from C�o <br /> above) � o <br /> Makeup Air Quantity(cfm); <br /> [3a–36] —^O^ <br /> (if value is negative,no makeup air is needed) 1 v <br /> 4.FormakeupAirOpeningSizing,refer NOT REQ�� <br /> to Table 501.41 <br /> A.Use thiz column if there are other than fan-assisted or atmosphericaliy vented gas or ail appliance or if there are no combustion appliantes.(Power vent 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 if 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 multiple atmospheritally vented gas or oil appliances using a common vent or if there are atmospherically vented gas or oil appliances and solid <br /> fule appliances. <br />