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Makeup Air Opening Table for New and Existing Dwelling I <br /> 7able 501.3.2 � <br /> . � <br /> One or mvltiple power One or mulNple fan- One aimospfierically Muitiple atmospherically � <br /> vent,dlrect vent ap• assisted appliances and • vented gas or oil ep• vented gas Or o11 ap� Oud di• � . <br /> pliantes,or no cpmbus• powervent ordirect pliance or one solld fuel pllances orsolid fuel ameter <br /> tlon appllances vent appUances appiiance appllances � <br /> Column A Column 8 Column C Column U � <br /> Paufveopening 1-36 1-22 1-15 1-9 3 <br /> Passiveopening 37-66 23—A3 16-28 10-17 4 ( <br /> Passiveopening 67-109 42-66 29-46 ig-2g 5 <br /> PasSNeopening 110-163 67-100 47-69 29—A2 g <br /> Passiveopeni �64-232 101-143 70-99 43-61 7 <br /> PassNeo enin 233-317 144-195 300-135 62-83 g <br /> Passiveopening 3�8-419 196-258 136-179 84-110 g <br /> w motorized Qam er <br /> Passiveopening 420-539 259-332 180-230 331-142 lp <br /> w/moto�tzed da er J <br /> PassNeopening 540—b79 333-419 231-290 143-179 11 + <br /> a <br /> w/motorixed dam er <br /> Powerod makeu air >679 >419 >290 >179 • NA <br /> Notes: � <br /> A. An equivalent length of 100 feet of round smooth metal Euct is assumed.Subtract 40 feet for the exteMor hood aM ten feet for ea<h 90�degree elbow to <br /> determine the remaining length of stralght dutt allowable. <br /> B. If Hexible duct is used,increase the duct diameter by one inch.Flexlbie dud shatl be stretched w�th minimal sags.Compressed duct shall not be aaepted. ' <br /> C. Barometric dampe�s are prohibRed in passlve makeup alr opentngs wiien any atmosphericaliy vented appUance is Instalted, <br /> D. Powered makeup air shall be elect�icalfy interlocked with the largest exhaust tystem. <br /> . � • � � <br /> t <br /> Section ' <br /> Combustlon air � <br /> Not requlred per mechanical toda(No atmasphertc or powervented appllances) � <br /> Passhre isee IFGC Appendix E,Worksheet fi•1) Size and type I <br /> Other,describe: <br /> 1 <br /> i <br /> Explanation-If no afmospheric or power vented appliances are Instplled,check the approprlate box,no[requlred. !f a power vented � <br /> oratmospherlcally vented appHance lnstalled,use IFGCAppendlx E,Worksheet E-1{see below). Please entersize and type. Combus- � <br /> tlon a!r ventsupplies must communicate with the appllance or pppliances that requlre the cambusilon pir. <br /> Sectlon F calculations follow on the next 2 pages. I <br /> ! <br /> , � <br /> i <br /> � <br /> Page 4 of 6 <br />