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, <br /> , � �, __ �_ <br /> . , . _ <br /> . ' ' � � C � '+�o ��: ,��---''_ <br /> Tahle 501.3.1 � <br /> Procedura to Determine Mak�up Air Quantity For Exhaust Equipment in Dwellings <br /> Use the Ap ro nate Column to Estim2te House Infiltration <br /> Ona or multiple pcwer vent One or multiple fan- One aimospherically Multiple atmospherically <br /> or direct veni 2pplianc2s or assisted appliances znd ven'ted gas or oil vanted gas or oil <br /> no combus'tion apQliances� power veM or direct vent appliance or one solid appliances or solid fuel <br /> a lianczse fuel a liance� a liances° <br /> 1a) oressure factor(cfmfsf) 0.15 � 0.09 0.06 0,03 <br /> b) conditioned floor area <br /> (s�(induding ��'�� I <br /> unnnished basementsl <br /> Estimated House I <br /> Infilfration(cfm): ��� <br /> 1ax1b <br /> 2. Exhaust Capaciiy <br /> a) coniinuous exh2ust- � <br /> only ventilaiion systems <br /> (cfm): (not applicable � � <br /> lo balanced ventilaiion � <br /> s stems such as HP,V) <br /> b cloihes d er � 135 � 135 � 135 � 135 <br /> c) 80%or largest sxhaust <br /> rating�ctm);(not <br /> applicable if <br /> rscirculating system or � � <br /> ii powered makeup air <br /> is elec[ricaily <br /> interlocked and <br /> matched to exhaust) <br /> d) 80%of next larg�st <br /> exhaust rating(cfm): <br /> (not applicable iT <br /> recirculating sys'tem or <br /> if pawered makeup air <br /> is elecirically <br /> interlocked and <br /> match�d to exhaust ; not a licable <br /> Total Exhaust Capaciiy i �"^� � <br /> cfm):f2a+2b+2c+2d � � «"* <br /> 3. Makeup Air I � <br /> Requirement ��� I <br /> a) To'tal Exhaust Capacity <br /> from above � <br /> o) tstimated House ) I j � � <br /> Infiitraticn irom above t9 <br /> M2keup Air Quaniity , <br /> (cfm):[3a-3b) ��,�'a-� <br /> (if value is negative,no '+,��,,„ <br /> makeu air is nzeded <br /> 4. For Makeup Air <br /> Opening Sizing,refer to <br /> Table 501.3.2 �' `'� <br /> A Use this column if there zre other than fan-assis[ed or aimosphencally vented gas or oil appliances or if there are no combustion <br /> appliances. <br /> e Use this column if there is one fan-assisted appliance per venting system.0'ther than atmospherically vented appliances may also be <br /> included. <br /> � Usz this column if there is on�atmosphericaliy vented(other than fan-assisied)gas or oil aPpliance per venting system or one solid fuel <br /> appliance. " <br /> ° Use:his column if ih2re are multiple atmosphencally ven'ted gas or oil appliances using a common vent or if there are atmospherically <br /> vented gas or oil aoplianczs and solid fuel zppliances. <br /> 13 <br />