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. '�`4`� <br /> Directions-fn arder to determine the mokeup arr,Ta61e 501.4.1 must be filted out{see belowJ. �or mest new insta!(ations,column • <br /> A will be opproprfate,however,if atmasphericalfy vented appliances orsolld fue/npplionces are instat►ed,use ihe appropriate <br /> column.For existirtg dwellings,see lMC501.4.3. Piease note,;f the moke�p air quontity is negotiv�,na additionol mokeup air wil! <br /> be required for ventilacion,if the value is posrtive refer to Table 501.3.2 and size the opening. Tronsfer ihe cfm,size of opening and <br /> type(round,rectangutar,flez or rigidJ to the lost fine of section D. The matce-up uir suppfy must be installed per IMC 503.4.2.3. <br /> Table 501.4.1 <br /> PROCEDURE TO OETERMINE MAKEUP AIR QUANITY FQR EXHAUST EQUIPMENT IN DWELLiNGS <br /> Ad�tionat combustion afr wlll 4e required for combusUon s Iiantes,see tcA�R method for olculallons) <br /> One or muitiple power One or multiple fan- O�e atmospherlcaty vent Multipie atmosphericatly <br /> vent or d[rect vent assis:ed applianoes and gas or oil appliance or vented gas or oil <br /> appliances or no prnver vent or direct vent one Solid fuel applianCe apptlan[ps or s01id fuel <br /> com6ustion aPP�ances appfiances aPPliances <br /> Column C Column D <br /> Column A Coiumn B <br /> 1.Use the appropriate column ta <br /> estimate house inflltration 0.15 0.09 0.06 0.03 <br /> a�pressure factor <br /> ([Fm/sr <br /> by eonditioned floor araa(sf){induding O��� <br /> un�inished basemenu � <br /> Estimated House infiltratlon{cFm):f?a � 'O <br /> x Sb <br /> 2.Exhautt Gpacity �� <br /> a)Continuous exhaust-onty ventflation <br /> system(cfmj;(not appucabie to <br /> bafanced vennlation systems such as <br /> HRV) <br /> b}clothes dryer(cim) 135 135 135 135 <br /> c180S5 af largest exhaust rating(cfm); �� <br /> Kitchen hood typinliy � <br /> (not applicable if recirculating system <br /> or ff powered makeup air is electrFcally Il a� <br /> interloc�ed and match to afiaust <br /> d)BO%a nert lar��t exhaust ratin6 g U <br /> (am): baih fan typka{fy Not ,�s� <br /> (not applicable if recirwlatlng rystem Applicabie � y <br /> or if powered makeup atr is etearl�atiy <br /> interioc�.ed and matcF►ed to exhau� <br /> Totai ExhauSt CapeCity(Cfm); (�/ � <br /> 2d+2b+2G*2d] l <br /> 3.Ntakeup Air Quantit�r(cfm} n�� <br /> e)tota�exhaust capadty(fmm above) 1 <br /> 6)es�mated house i�filtration(from �U <br /> above) <br /> Makeup Air quanttty�cfm}; <br /> (3a—3b) � <br /> (ii��alue is negative,no.makeup air is Q <br /> needed} <br /> 4.For malceup Air Opemng Sizing, �M M ,�+� <br /> ra6er to Tabie 50L4.2 ������ <br /> A. Use ihis column if there are ather than fan-asslsted or atmosphenca�ly ve�rted gas or ot�appuance or it:here are�o�oma�ao�a���n�.cP�e��e�=a^d <br /> direct v�nt applianC2s m2y be used.) <br /> B. Use this mlumn if there is one fan-assisted apptiance per venting system.(Apppances other than atmospherically vented appiiances may a�50{�If1C�UdEd.� <br /> C Use this[olumn if there is one atmospheriolly vented{ather thao"ran-assisted)Sas or oil appliance per venUng system or one solid iue�appliance. <br /> D. Use this column If there are multiple atmospharicaily venred gas or oii appliances using a common vent or if:here are atmospheritally vented gas or oii <br /> appiiances and solid fuel appliantes_ <br /> � � <br /> I:\Buliding�SafetyPalidesinfom►et3onlCurcent\2016\VentMakupCombAirGis2016.doa P2ge 3 Of 6 <br /> .� <br /> :�� <br />