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- <br /> Table 501.4.1 <br /> Procedure to Determine Makeup Air Quantity for Exhaust Appliances In Dwelling Units <br /> • <br /> ' I MULTIPLE APPLIANCES THA- <br /> ONE OR MULTIPLE FAN- ONE ATMOSPHERICALLY ARE ATMOSPHERICALLY <br /> ' • ONE OR MULTIPLE POWER VENT ASSISTED APPLIANCES AND VENTED GAS OR OIL VENTED GAS OR OIL <br /> OR DIRECT VENT APPLIANCES OR POWER VENT OR DIRECT APPUANE OR ONE APPLIANCES OR SOLID FUEL <br /> • NO COMBUSTION APPUANCESA VENT APPLIANCEse SCUD FUELAPPLIANCEc APPLIANCES() <br /> 1.Use the Appropriate Column to Estimate House Infiltration <br /> a)pressure factor <br /> (cfm/s') • I 0.15 I 0.09 I 0.06 I 0.03 <br /> b)conditioned floor 1u1 / _ • <br /> area(sf) .�T• 4 ' LO . . <br /> (including unfinished basements) • <br /> •Estimated House • <br /> v.- infiltration(cfm) - � `�Y <br /> ;P` [1a x 1b) v <br /> . ° . xhaust Capacity <br /> 1 d•a)•olothes dryer I• 135 I 135 I 135 135 <br /> ii bt 0I I.)•3O%of largest <br /> '.;....• •eXhaUSt rating(�i m): . 1"-k <br /> '(not applicable if recirculating system or if powered makeup air is electrically interlocked and matched to exhaust) <br /> j.c)80%of next larges�chaust rating <br /> -- I I <br /> j.- g 1cfm) I notapp)fc?hle • <br /> ;.(not applicable if recirculating system or if powered makeup air is electrically interlocked and matched to exhaust) <br /> . 1 Intel Exhaust Capacity . • <br /> (2e+2b-2c) <br /> 3.Makeup Air Requirement <br /> al Total Exhausti • <br /> .CapacitypCapacitytyiy <br /> tfrom above) <br /> bj Estimated House <br /> i• Infiltration(from i: ' <br /> J•, above) <br /> I'M • <br /> akeup Air • <br /> •r'.-Quaiity(cfm): <br /> 11-7,—(3a-3b) <br /> j`-(rvalue is•negative,no makeup air is needed <br /> %'For Makeup Air Opening Sizing,refer to Table 501.4.2: • <br /> U . <br /> -:.Use this column if there are other than fan-assisted or atmospherically vented gas or oil appliances or If there are no combustion appliances, <br /> . )3.LEisethis column if there is one fan-assisted appliance per venting system.Other than atmospherically vented appliances may also be included. <br /> C..Use this column if there is one atmospherically vented(otherthan fan-assisted)gas or oil appliance per venting system or one solid fuel appliance. <br /> 3..AJse this column If there are multiple atmospherically vented gas or oil appliances using a commonvent or if there are atmospherically <br /> r• <br /> ,vented gas or oil appliances and solid fuel appliances. • <br /> i'' <br /> I. <br /> l'..' • <br />