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• • . ( <br /> Table 501.3.1 <br /> Procedure to Determine Makeup Air Quantity for Exhaust Equipment in Dwellings <br /> Use the A ro riate Column to Estimate House Infiltration <br /> One or multiple power vent One or multiple fan- One atmospherically Multiple atmospherically <br /> or direct venl appliances or assisted appliances and vented gas or ol vented gas or oil <br /> no combustion appliances" power vent or direct vent appliance or one solid appliances or solid fuel <br /> _ a liancesg fuel a liap ncer a liances° <br /> 1a ressure factor cfm/sf 0.15 0 09 0.06 0.03 <br /> b) conditioned floor area <br /> (sf)(inc!uding �/�� <br /> unfinished basements �-/ <br /> Estimaied House <br /> Infiltrat�on(crm): ���� 3 <br /> 1ax ib <br /> 2. Exhaust Capacity . ' <br /> a) continuou�exhaust- ' <br /> only ventilation systems <br /> (cfm): (not applicable <br /> to balai�ced ventilation <br /> s stems such as HRV <br /> b clothes dr�er 135 135 135 135 <br /> c) 80%of iarges�exhaust <br /> rating(cfm):(not �� � <br /> applicable if <br /> recirculating system or <br /> if powered makeup air <br /> is electrically <br /> interlocked and <br /> matched to exhaust <br /> d) 80%of next largest � <br /> exhaust raling(cfm): /� <br /> (not applicable if � <br /> recirculating system or <br /> if powered makeup air <br /> is electrically <br /> interiocked and <br /> matched to exhaust not a licable <br /> Total Exhaust Capacity �`G/ <br /> cfm : 2a+2b+2c+2d U / <br /> 3 Makeup Air <br /> Requirement <br /> a) Total Exhaust Capacity <br /> from�bove <br /> b) Estimated House �, / <br /> Infiltration from above �� <br /> Makeup Air Quantity <br /> (cfm)�[3a—3b] �� �'�� <br /> {if value is negative,no <br /> makeu air is needed <br /> 4. For Makeup Air <br /> Opening Sizing,refer to <br /> Table 501.3.2 <br /> A Use lhis column if there are other than fan-assisted or atmospherically 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.Other than atmospherically vented appliances may also be <br /> included. <br /> � Use this column if there is one atmospherically vented(other than fan-assisted)gas or oil appliance per venting system or one solid fuel <br /> appliance. <br /> ° Use this column'rf there are mu�tiple atmospherically vented gas or oil appliances using a common vent or if there are atmospherically <br /> vented gas or oil appliances and solid fuel appliances. <br /> 13 <br />