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. ' <br /> Dfrections-In order to determine the makeup air,Table 501.4.1 must be fllled out(see below).For most new insbllatbns,column A will be appropriate,however,if <br /> atrnospherially vented appliances or solid fuel appiianca are Installed,use the approprlate oolumn. Please note,H Me makeup air quantity is negative,no addkia�al makeup air <br /> will be required for veMilation,H the value is positWe refer to Tabk 501.4.2 and size the openlna.Transfer the chn,she of openfry�and type(round,rectanguiar,flex or riQid)to <br /> the last Ifne of section D. <br /> Table 501.4.1 <br /> PROCEDURE TO DETERMINE MAKEUP AIR QUANITY FOR EXHAUST EQUIPMENT IN DWELLINGS <br /> Additional combusdon air will be re uired for wmbustbn a Ifances see KAIR method for nkulatbns , <br /> One or multiple pc�nrer One w multiple fan- One atmospheriatly vent Multiple atm�phe�ical- <br /> veM or direct veM ap-pliances assirted appliances and power Qas a oil applfance w one solid ly vmted gas or ofl epplWnca <br /> u no eombus-tlon appliences vent or direct veM appllaiaKes fud applience or solid fuel applknces <br /> Column D <br /> Cdumn A Column B Column C <br /> 1• 0.15 0.09 0.06 0.03 <br /> a)presswe fador <br /> (cfm/s� <br /> b)condRioned floor area is�(In�Juding 4912 <br /> unfinished basements) <br /> Estimated House InfilVation(cfm):[la 737 <br /> x Sb) <br /> 2.Exhaust Ca WdtY <br /> a)continuous e�aust-only veMilatlon system ERV�� <br /> (cfm);(not applfa6le to ba-lanced ventilatfon <br /> systems such as HRV) <br /> b)dothes dryer(cfm) 135 135 135 135 <br /> c)BO%of largat exhaust ratin6l�); <br /> Krtchen hood typiwlly 24� <br /> (mt applicable M recirculsdnQ system w H <br /> powered makeup air is elecMally interlxked <br /> d)80%of next la►gat exhaust rating Not <br /> Ictml:natn fan typ�niH Appticable <br /> (not applfable ff rec{rculaUr�system or H <br /> prnvered makeup air is electrlcally fnteriocked <br /> Total Exhaust Gpacfty(cfm); <br /> [2a+2b+2c�2dJ 375 <br /> 3.Makeup Air QuarKity(cfm) 375 <br /> a)total e�aust apadty ifrom above) <br /> b)estimated house Inflitratlon(irom �37 <br /> above) <br /> Makeup Alr QuaMity(cim); <br /> �3a-3b� -362 <br /> (N value Is negatNe,no makeup alr k needed) <br /> 4.For makeup Air Oprnfng SfzinQ,refer <br /> toTable501.4.2 NOT REQ'D <br /> A Use thls column ff therc are other than hn-assisted or atmospharkally veMed gas or oil appliance w ff there are no combustlon applianca.(Power vent and direct vent <br /> applianca may be used.) <br /> B.Use this column ff there is one fan-auisted appliance per venting system.(Applisnces other than atmospherkally vented appliances may also be included.) <br /> C.Use this column Nthae Is one atmospherkally vented(otha than fan-assisted)Qas or oil appliance per vendng system or one sdid tuei appliance. <br /> D.Use this column N Mare are muRiple atmosphericslly veMed Qas w ofl appliances using a rnmmon veM or H there are atrn�phe►{wly veMed ps or ofl appl"�ances and solid <br /> fule applfaMes. <br />