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VENTILATION <br /> 402A OpcninFs bclo�c �radc. 1\'hcrc n�xnin�.hda��� graJc 403.2.27txnsfcrair.l:xcepnvhcrcrccirculationtmmsuch <br /> proridc requinJ namral cenlila�iun. the uutliJc hurirontal spaces is prohihiteJ hy� '1'able J03.3. uir transfemJ fmm <br /> cic;vspacc mc:uurcd pci��ndiculariothc opcninF.hall bc unc ikcupicd spaccs is noi pmhibi�ed Gom scrring as makcup <br /> and onc-half lintcs Ihe d�pih ol Ihc opcnin�!.Thc dcplh uf Ihc :iir for rtyuircd cshaus�systcros in such.pacc.;�s kitchcn�. <br /> opening tihall be nuasurcd Gom thc a�'cr.ice aJjuining erounJ ba�hs. toilet rooms, clevaton and smoAing lounpes. The <br /> Icccl to�hc buuom of thc upcninp. amount of trans(cr:iir and czhausi air sh;Jl bc su(ficicnt to <br /> providc ihc �o��� ra�eti as spccificd in Scctions J03.? nnd <br /> 4033.1. Thc rcquired outdcwr air r:uct specificd in Tablc <br /> SECTION 403 ��a•� sh:dl bc inuoduccd direcily imu such spaccs or imu <br /> MECHANICAL VENTILATION the ixcupied spaces from which air is iransferred or a com- <br /> hin:uinn of hath. <br /> J03.1 \'entilalion spstem.\lechanic:J ventilnlion xh:Jl be prn- <br /> ��idcJ hy a mcthoJ of supply air and retum or cahaust air.l'he 403.3 Ventilulion rute Ventilation syttems shall hc dcsigned <br /> anwunt of supply :iir shall hc appruximalcl�� equ:J to ihc «, n;����m< <;��:����y w�����i>- m� minimum umdair air0o�c <br /> ;unuunt uf rcturn anJ cshaus�air.'I'hc sy.icm.hall not bc pro- raic detcrminrd in aceurdancc wiih'I'ablc d03.3 hascd on thc <br /> hibiteJ(rompnKlucingnegaliveurposilieepressure.'I'hesys- ��upanc}�of�hespaceand�heuceupanllo;�dorolherparame- <br /> tcm�u cunecy ccniil;nion air shall bc dcxigncd:md insudlcd in ��r as staicJ thcrcin.9'hc<xcupam load milircd for dcsign ol' <br /> ;�ccutxl:mcc with Chapicr G. �hc ventiimion systcro shall noi bc Icss th:m thc numbcr Jctcr- <br /> mincJ from thc es�im.ucd maximum�xcupam load r.uc indi- <br /> Ventilaiion supply sy�tems shall be designeJ io dcli��er thc c:ucJ in 'G�ble 403.3. Ven�ilaiion r.ues for cxcupmicies nul <br /> requircd rare uf supply airto ihe ixcupied zone�ci�hin an uccu' rcprc�emeJ in'Pable 4033 shall be delermineJ by an approceJ <br /> picJ sp;ice.'fhc occupieJ�nnc sh;ill haec huundarics meawrcJ cnEincering:m;dpzis.'I�hc ecntilmion xys�em shall be dcsiEncd <br /> a�3 inchcs(7G tnml and 72 inches(I R29 nuul abacc thc Iluur in suppl��Ihc rcyuircd ralc u(ecntila�iun air cuntinuuutlp dur- <br /> and?d inchcs(GI11 mm)Gnm thc cnclnsing�calln. inE thc periud thc building is cxcupicJ. cxcep� as othcncisc <br /> 41131Ou1doorairnyuircd.Theminimumeen�il;nionraieuf `tmeJinolherproeitionsofthec�le. <br /> uwJour air .hall be determined in attorJance wiih Sectiun lizceptinn:'Phe cecup;mt lo:id iz not nquimd tu be deter- <br /> d(11.i. mincd.b:iscd on thc c.�im:ucd ma�imum cxcupam IoaJ ratc <br /> Is�ceplinn:\1'herc ihc rcEisleted design profe�siunal dcin- indicaicd in 'G�ble J033 where approecd stalis�ical dat:i <br /> unsira�es Ihat an enpineemcl cenlilatinn s��stent Je�ign �cill dixumem the acairacq of an ahem:ue amicipaicd occupant <br /> prcecnt Ihc maximum conccnu;uion of conuunin:unn Irom dcnsi�y. <br /> ezcecdin��hat ohuiinahle by thc rote of umduornir�ratila- J113.3.1 tiystem operatinn.'1'he minimwn ilu�e r.uc nf uut- <br /> tionJc�cnuincJ in accordance u�ith Scrtiun aQi.i,�hc tnini- door air thal Ihc��cntila�ion s}'sicm mus�bc cap;iblc of wp- <br /> mum rcyuircJ rutc u( oWdunr nir tihall bc rcduceJ in plyingiiu�in4ic.operationtihallbc�xrmittcJ�ohcb.�.udon <br /> accurdancc�cith such cn�inccreJ sysicm Jc�i�n. �hc ralc per�xrsun indicatcd in"1'ohlc J033 anJ�hc acmal <br /> 011J:2.1 H.rirc�d:�lion of aic l'hc air mquircJ hy Scctiun numbcr uf occup;m�s�;rcscnl. <br /> d03.1 shall nul be recinula�cJ.Air in escess u(�hat rcyuired JIIJ..1.: Common renlilation srslem.\\'here spaces hac- <br /> h�� ticction •1113.3 shall nut bc pruhihi�cJ I}om bcing ing JilTcmnt ccntil;uiun rate rcyuircmcnis are scrvcd b�� a <br /> rccirrul;itcdar.icotnponemufsupplyairtohuildingspaccs, cnntmon�'cmila�ionsyxlcm.�hcm�ioofomJour.�irw�ot:d <br /> c�ccpt th;n: supply air(or the.��stcro shall bc dctcrniincd hascd on thc <br /> I. Vcmilalion air >h:dl not bc rccircul:ucd Gotn onc �P:�«ha��ing�hclargcriowdour;iirrcyuircmcnlorshallbc <br /> J���clliuE lu;muthcr or to Jissimilar uccupancica dctcrmincd in accordancc with�hc follou•ing(onnula: <br /> ?. tiuppi�� :iir tu a ����imming puol anJ asxkiatcJ dcck �,_ .\'-- (l?yualinn 4-1) <br /> arr.��sh:dl nui hc rcrircida�cd wilcss;uch air is dchu- (I+.\' —Z) <br /> tniJilicJ tu nt:iimain�hc rclaiicc humiJilv of thc arca <br /> a� h0 perccm ur Icss. Air tiom ihis arca ahall not bc <br /> I rccirculated lu uthcr.paccti��1�crc 10 perconl onnorc �vlicm <br /> ul �hc rcwltinE supply :�irsvcam comiats ol air )'= Y.,/V„ = CurrecicJ frac�iun uf owJour air in s��stem <br /> rccirnilatcd fnm�ihc.c sp,ccs. supplp. <br /> 1 i. \\'hcrc mcchnniral c�haus� is rcyuired by \utc h in X= 1;,,/V„ = Uncortceted (raciiun o(ouiJoor air in s�:t- <br /> 'I'anlc JOi.J. rccirculalion of air Gom such sp:�ccc Icm tiupply. <br /> sluill bc prohibitcJ. All air supplicd to wch spaccs <br /> .hallbccahaustcd.includinc:my:iirincscc.so(�h;n L= V,.n(, ` I'ractionofoutdournirincri�icalspacc.9'!ic <br /> r�yuireJ b� Tablc d0?.3. cntical sp;�cc is�hat.pacc wi�h�hc grcaic+� <br /> rcyuired 1'r.ictiun of owd�wr air in thc supply <br /> J. \1'hcrc incclianir.d cshausi is rcyuired by Voic h in to this spacc. <br /> 'I'ahlc J03.1, mcchnnical cxhaus� is rcyuircd anJ <br /> rcrirculatiun is prohibilcd�chcrc 10 perccnt ur morc 1�,.: = Currcctcd lo�al outdcwr.iirflo�e ra�c. <br /> ul thc «sulting supply airslrc;im cunsi,�s ol ;iir i�., _ 'r�>„i,��i,i,i�•n�,"��:u�.�.�..�i,����,��,r,n�����i>�r�,� <br /> rccircul:ucd fmm ihcsc spacc.. all branchcs uf thc sysicm. <br /> �p YOO6INTERNATIONAL MECMANICAL CODE� ,'/� <br /> A/ <br />