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Makeup Air Opening Table for New and Existing Dwelling <br /> Table 501.3.2 <br /> One or multiple power One or multiple fan- One afmospherically Multipie atmospherically <br /> vent,dlrect vent ap- assisted appliances and vented gas ar oll ap- vented gas or o(I ap� Duct di- <br /> pliances,or no combus• power vent or direct pliance or one solid luel piian�es or solld fuel ameter <br /> tion appiiances vent appliances appliance appliances <br /> Column A Column B Column C Column 0 <br /> Passiveopeni�g 1-36 1-22 1-15 1-9 3 <br /> Passive opening 37-66 23-41 16-28 10-17 q <br /> Passive opening 67-109 42-66 '29-46 18-28 5 <br /> Passive opening 110-163 67-100 q7_bg 29_4Z 6 <br /> Passive opening 164-232 101-143 70-99 43-61 7 <br /> Pas�iveopening 233-d17 144-'195 100-135 62-g9 g <br /> Passive opening 318-A19 196-258 136-1�9 84-110 9 <br /> wJmotorized damper <br /> ' Passlve opening 420-539 259-332 180-230 Lll-142 Lp <br /> w�motorized damper <br /> Passive opening 540-679 333-419 231-290 143-199 11 <br /> w/motorized damper <br /> Powered makeup air a679 >419 >290 >179 NA <br /> Notes: <br /> A. An equiva�ent length of 100 feet af round smooth metal duct is assumed. Subtract 40 feet for the exterior hood and ten feet(or each 90-degree el6ow to <br /> decermine the remaining tength qf straight du�t allowable. <br /> B If flexible duct i;used,incrgase the duct diameler hy one inch. Plexible duct shail be stretched with minimai sags. Compressed duct shall npt be atcepted. <br /> �. Barometric dampers are prohibit�d�n��ass�vr n�al:eup d�r openings when any atmospherica�ly vented appliance Is installed. <br /> D. Powered makeup air shall be electricaily interlocked with the Iargest exhaust system. <br /> Sections F <br /> Combustion air <br /> Not required per mechanical code(No atmospheric or power vented appliances) <br /> Passive(see IFGC Appendiz E,Worksheet E•1) Size and type <br /> Other,describe: <br /> Exptanation-If no atmospherlc or power vented appliances are installed,check the appropriaCe box, not required. If a power vented <br /> or atmospherically venied applionce installed, use IFGGAppendix E, Worksheet f-1 (see befowJ. Please entersize and type. Combus- <br /> tion air vent supplies must communicate with the appliance or oppliances that require the combusilon air. <br /> Section F calculotions follow on �he next 2 pages. <br /> Page 4 of 6 <br />