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Direcdons-In order to determine the makeup air,Toble 501.3.1 must be filled out(see below). For most new installations,column A <br /> will be appropriate,however,If atmospherically vented appliances or solid fuel appliances are Installed,use the appropriate column. <br /> For existing dwellings,see iMC501.3.3. Please note,If the makeup air quantity is negative,no additional makeup air will be re- <br /> quired for ventilation,If the value Is positive refer to Table S01.3.1 and size the opening. Transfer the cfm,size of opening and type <br /> (round rectangular,flexor rigid)to the lost line of section 0. The make-up air supply must be instaliedptr IMCS01.3.2.3. <br /> Table 501.3.1 <br /> PROCEDURE TO DETERMINE MAKEUP AIR QUANITY FOR EXHAUST EQUIPMENT IN DWELLINGS <br /> Additional combustion air will be required for combustion appliances,see KAIR method for calcuiadons <br /> One or multiple power I One or multiple fan• One <br /> atmospherically vent MuRiple atmospharial- <br /> vent or direct vent ep• assisted spplfai+eu and gas or oil appliance or N vented Ras or all <br /> pliances or no nimbus- power vent or direct vent one sand fuel appliance Rppflances at sad fuel <br /> tion appliances appliances app{ances <br /> t:olurhn C Column 0 <br /> Column A Column{ <br /> L <br /> a)pressure factor 0.15 0.09 0.06 0.63 <br /> d <br /> b)andidoned floor area On(Including �/ <br /> aunfkdthed basements <br /> 74- <br /> Estimated Howe tnfil"dat(cion):(la n <br /> e lb 6� <br /> L bhewt Capadty <br /> a)continuous exhaust-onp ventilation /01 <br /> ayatem(cfml;(not applicable to be- <br /> lanced ventdeaon svuems such as <br /> HRVI <br /> b)dodos dryer Wm) 13S 13S 13S 13S <br /> 4 las of largest eAsust rasing(dml: <br /> gahead <br /> (,pt applicable If recirculating <br /> system -�(•f <br /> or K powered makeup air Is elearfalty <br /> imeModted and match to metawo <br /> —4-80%of matt largest m6ausit rating <br /> Icfi4 bath fen typically . Not <br /> (not applicable E recirculating System Applicable <br /> or k►waited makeup air k electAealiv <br /> Interlodsed end•matdned to whoustl <br /> Tow bhoust capaft(dmh ' <br /> ♦Uilc• ` <br /> 3.htakwp Air Qu vWW(dm) <br /> al total esduust capacity(from above) <br /> b)estimated house knflitratlan(from <br /> above <br /> Makeup Air Qwntity[din); <br /> (la•ab) <br /> (if value it negative,no makeup air is <br /> needed <br /> 4 For nukwp Air Opening sizing,refer <br /> to Table 501.4.1 <br /> A. Use this column if there are other then(an-assisted or atmospherically vented gas or on appliance or if there are no combustion appliances.(Power vent <br /> and direct vent appnaneu may be used.) <br /> {• Use this column if there is one ian-usisted appliance per venting system.(Appliances other than atmospherically vented appliances may also be in- <br /> cluded.) <br /> C. Use this column If there is one atmospherically vented(other than fan-assisted)gas or of appliance per venting system or one solid fuel appliance. <br /> 0. Use this column if there are multiple atmospherically vented gas or o1 appliances using a common vent or If there art stmosphariallyvented gas or all <br /> appliances and solid fuel appliances. <br /> Pages 3 of 6 <br />