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Directions-In order to deCermine the makeup air, Table 501.3.1 must be fll/ed out(see belowJ. for most new installat/ons,cotumn A <br /> wi!!6e appropriate,however,if atmosphericolly vented appliances or solid fuel appliances are JnstaUed,use the oppropriate column. <br /> For exlstfng dweAings,see!MC 501.3.3. Please note,!f ihe makeup aIr quanflty is negaCive,no additional makeup air will be re- <br /> quired for veniilatlon,if the vplue is positive refer fo 1"able 501.3.2 and size the opening. Transfer the cfm,size of opening and type <br /> (round,rectangular,flex or rig/dJ to the lost line of section D. The make-up a1r suppiy must be InstaUed per IMC501,3.2.3, <br /> Table 501.3.1 ( <br /> PROCEDURE 70 DE'fERMfNE MAKEUP AIR QUANITY fOR EXHAUST EQUIPMENT IN DWELLINGS <br /> �Additlonal combusdon air wlll be re uired for combustlon a pliances,see KAIR method for calculations) <br /> One or multlple pOwer One or multlple fan- One atmosphericallyvent Multlple atmospherical• � <br /> vent or dlrect vent ap• assisted appliances and gas or oll appliance or lyvented gas or oil <br /> pilances or no combvs- power vent or direct vent one solld fuel appliance appliances or Solld fuel � <br /> tlon appllanCes app8ances appliances <br /> Column C Column D I <br /> Column A Column 8 <br /> 1. �a)pressure factor 0.15 0.09 0.06 0.03 <br /> (cPm/sf) <br /> b)condltioned tloor area(s�(including r� <br /> unFlnished basements ��� 1�� <br /> Estimated HouSe Inflltratlon(cfm):[1a /'�CA` � <br /> x IbJ (� � <br /> 2.Exhaust Capacity <br /> a)contlnuousexhaust-onlyventllatlon � <br /> system(cfm);(not appiicable to ba- <br /> lanced ventilatlon rystems such as <br /> HRV) <br /> b)clothes dryer(c(m) 135 135 135 135 <br /> c)80%of largest exhaust rating(cfm); I <br /> Kitchen hood typically <br /> (not appikabte if reciralating system Z �(� <br /> or If powered makeup afr fs electrically I <br /> Interlocked and match to exhaust) I <br /> d)80%of next largest exhaust rating � <br /> (cFm); bath(an typically NOt i <br /> (not applitable if recirculating system <br /> or If powered makeup air Is eledrlcally Applicable <br /> interlocked and matched to exhaust) ! <br /> i <br /> Total Exhaust Capacity(dm); � �� � <br /> [2a+2b f2c+2dl <br /> 3.Makeup Air quantity(cfm� ^-� � <br /> a)total exhaust capacity(from above) � /� <br /> b)estlmated house inflltratlon(From /^�d � <br /> above) V � <br /> Makeup Afr Quantity(dm); � <br /> [3a-3b) � �� �,• 7i ' <br /> {if value is negative,no makeup air is � <br /> needed) ' <br /> i <br /> 4,For makeup AlrOpening Sizing,refer � <br /> to Table 501.4.2 I <br /> i <br /> f <br /> A. Use this column if there are other than fan•assisted or atmospherically vented gas or oil appliance or if there ate no combustlon appliances.(Powervent , <br /> and direct vent appliances maybe used.] <br /> B. USe this column If there Is one fan-assisted appliance per venting system,(Appllances other than 3tmosphericallyve�ted appllances may also be In- <br /> tluded.) <br /> C. Use thls column If there Is one atmospherlcally vented(other than fan-assisted)gas or oil appliance perventing system or one solld (uel appliance, <br /> D. Use this column if there are multiple atmospherically vented gas oroll appllances using a common vent or If lhere are atmospherltallyve�ted gas Or oil <br /> appliences and solld fuel appllances. <br /> � <br /> ' <br /> � <br /> Page 3 of 6 <br /> � <br /> � <br /> � <br /> � <br />