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Makeup Air Opening Table for New and Existing Dwelling I <br /> Table 501.3.2 � g <br /> ; F <br /> � � <br /> One or multiple power One or multlple fan- One atmospherically Multiple atmospheriplly i <br /> vent,direct vent ap• assisted appliances and • vented gas or oil ap- vented gas or oil ap� Duct di- � <br /> piiances,or no combus- power venc or direct pliance or one solld tuel pliances or solid fuel ameter � <br /> tion appllances vent applfances appllance appliances <br /> Column A Column B Column C Column 0 � <br /> Passfveopening 1-36 1-22 1-15 7,-9 3 � <br /> I <br /> Passiveopening 37-66 23-41 16-28 10-17 q � <br /> i 6 <br /> Passiveopening 67-109 42--66 29—q6 lg_Zg 5 � p <br /> Passive opening x10-163 67-100 47—69 29—4Z 6 ! � <br /> Passiveopenin 364-232 101-143 70-99 43-61 7 � <br /> PassNeopening 233-317 144-195 500-135 62-83 g ' <br /> Passiveopening 318-419 196-258 136-179 Bq-110 9 <br /> w/motorized damper � <br /> Passiveopening 420-539 259-332 180-230 1x1-142 10 <br /> w/motorized damper <br /> Passiveopening 540-679 333-419 231-290 143-179 11 � <br /> w/motorized damper � <br /> Powered makeup air >679 >419 >290 >179 • NA ; <br /> Notes: I <br /> A. An equivalent length of 100 feet of round smooth metal dud is assumed.Subtract 40 feet far the exterior hood and ten feet for eath 90�degree elbow to <br /> I <br /> determine tlte remaining length ot straight duct allowable. � <br /> B. If flexible dud is used,increase the duct dlameter by o�e Inch.Flexibie duct shall be stretched with minimaf sags. Compressed duct shall not be accepted. <br /> C. Barometric dampers are prohlblted in passlve makeup alr openings when any atmosphericaliy vented applfance is Installed. <br /> D. Powered makeup alr shall be electrically interlocked with the largest exhaust system. <br /> .� , 1 q <br /> Sections F ; � <br /> Combustion air <br /> � <br /> Not requlred per mechanical code(No atmospheric or powervented applla�ces) ? <br /> Passive(see IFGC Appendix E,Workshee[E-1� Size and type I f <br /> Other,describe: ; <br /> i � <br /> fxplandt/on-!f no p[mospheric or power vented applipnces o�e Insialled,check the approprJafe box,not�equired. !f a power vented ! <br /> or atmospherically vented opplipnce installed,use IFGCAppendix E,Worksheet E-1(see below). Pfease entersize pnd type. Combus- � <br /> tion air venf supplies mus[communfcate w(th the appliance or ppplionces thai require the combustion air. � <br /> i <br /> Section F calcu/ations follow on the next 2 pqges. � <br /> � <br /> � <br /> � i <br /> � <br /> � <br /> I <br /> [ <br /> ' � <br /> �: <br /> Page 4 of 6 <br /> � <br /> t <br /> r <br /> • � <br /> � <br />