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Dlrectlons-!n order io derermine the makeup a1r,Table 501.3.1 must befj��ed our(see below), For mosC new Installallons,column A <br /> wi!/be appropriate,however,if atmospherlcu!!y vented appilances or solid fuel app!lances are lrutaBed,use the approprlate column, <br /> For exlsting dwelNngs,see tMC 501.3.3. Please note,f ihe makeup atr quantlty!s negative,no addltiona!makeup alr w!1!be re- <br /> quired for veniilatlon,!f the value is posltive refer to 7able SDI.3.2 and size the opening. Transfer ihe cfm,slze of opening and type <br /> (round,rectangular,fiex or rigidJ fio the last llne of settlon D, The make-up alr supply must be Installed per IMC 501.3.2.3. <br /> Table 501.3.1 <br /> PROCEDURE 70 DE7ERMINE MAKEUP AiR QUANITY FOR BXHAUST EQUIPMENT IN DWELLINGS <br /> Addidonal combvstion alr wtll be re uired for combustlon a Itances,see KAIR method for calculatlons <br /> One or multiple power One or multlple fan- one atmospheticallyvent Multipla atmosphertcab <br /> vant or dlrect vent ap• assisted appllances and gas or oli appqance Or tyvented gas or oil . <br /> pllances orno Combus- power vent or dlrect vent one sdpd fuef appllance appllances or solfd tuel <br /> tbn appllances apptiances applianees <br /> Column C Column D <br /> Coiumn A Coiumn B <br /> 1. <br /> a)press�ue factw 0.15 4.09 0.06 0.03 <br /> cfm/sf <br /> b)conditbned floor area(sI)�Inciuding .7 <br /> unNnished basements �/ � <br /> Estlmated House inflltrailOn(cfm):(1a � <br /> x Ibl � I�, <br /> 2,Exhaust Capadty II <br /> a)contlnuous exhaust-only ventllation <br /> system(ctm);(not eppiicable to ba• i <br /> lanced venUlaUon systems such as <br /> HR4 <br /> b)cloihes dryer(cfm) 135 135 135 135 � <br /> c)80f5 of largest exhaust rating(dm); ', <br /> Kttehen hood typicatly '� <br /> (notapppcabfeifredreulatingsystem b � <br /> of If powered makeup air fs electriwlly �� I <br /> Interlocked and match to exhaust � <br /> d)80%of next largest euhaust rating � <br /> (cfm); bath fan typically ! <br /> (not applkable if recirculatMg system �ot <br /> or If powered makcup air Is elearlalty Appllc8ble �I, <br /> interlodced end matched to exhaust) <br /> Total Exhaust Capaclty(dm►; /��T. I ' <br /> 2a+zb+2c+2d C'� 3 <br /> 3.Makaup Afr Quantiry(cfm) <br /> a)total exhaust capadry{from above� / i <br /> b)estimated house Inflltratlon(from �� �l�� i <br /> above) '� <br /> Makeup Air Quant(ty(cfm); <br /> (3a-3bJ _ 1� �� <br /> (if value is negattve,no makeup afr is �'7 <br /> needed <br /> 4.For makeup A1r•Opening 5lzing,refer <br /> to Table 501.4.2 <br /> A. Use tlds column if there are other than fan-essisted or atmospherically vented gas or oll appilance or If there are no combustlon appllances.(Power vent , <br /> and direct vent appUances may be used.) � <br /> B. Use thk column if there is one fan-assfsted appNance perventingsystem,(AppAances other than atmospherlcallyvented appiiances mayalso be in- <br /> cluded.) <br /> G Use thls mlumn I(there Is one atmospherlcailyvented(othar than hn-astisted)gas or oil appliance per venting system or one sotid fuel appllance. <br /> 0. Use this column if there are mukiple atmosphericaliy vented gas or otl appllances using a common vent or if there are atmosphertcallyvented gas or oil <br /> appliances and solid fuel appllances. <br /> I <br /> I <br /> I <br /> Page 3 of 6 <br />