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Diredions-In ordei 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 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 /> wili be required for ventilation,if the value is positive refer to Table 501.41 and size the opening.Trensfer 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 multiple fan- One atmospherically vent Multiple atmospherical- <br /> vent or direct vent ap-pliances assisted appliances and power gas or oil appiiance or one solid �y vented gas or oil appliances <br /> ornocombus-tionappliances ventordirectventappliances fuelappliance orsolidfuelappliances <br /> Cnlumn D <br /> Column A Column B Column C <br /> 1• 0.15 0.09 0.06 0.03 <br /> a)pressure factor <br />(cfm/s� <br /> b)conditioned floor area(sf)(including <br /> unfinished 6asements) 4763 <br /> Estimated House Infiliretion(cfm):[Sa 714 <br /> x Sb] <br /> 2.Fxhaust Capacity <br /> a)tontinuous exhaust-only ventilation system E RV=O <br />(cfm);(not appticable 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 typically 24� <br />(not applicable if recirculating system or if <br /> powered makeup air is electrfcally interlocked <br /> d)80'�of next largest exhaust reting NOY <br />(cfm);bath fan typically <br /> Applicable <br />(not applicable if recirculating system or if <br /> powered makeup air is eleMrically interlocked <br /> Total F�chaust Capacity(cfmJ; 375 <br /> [2a+2b+2c+2d] <br /> 3.Makeup Air Quantity(cfm) 375 <br /> a)total exhaust capacity(from above) <br /> b)estimaied house infiltretion(from 714 <br /> above) <br /> Makeup Air Quantity(cfm); <br /> [3a-3b] -339 <br /> (if value Is negative,no makeup air is needed) <br /> 4.FormakeupAirOpening5izing,refer NOT REQ�� <br /> to Table 501.4.2 <br /> A.Use this column if there are o[her than fan-assisted or atmospheritally vented gas or oil appliance or if there are no combustion appliances.(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 appiiance. <br /> D.Use this column if there are multiple atmospherically 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 />