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PASSIVE MAKE-UP AIR OPENING SCHEDULE <br /> TABLE FOR SIZING PASSIVE MAKE-UP AIR OP�NINGS Diameter Path D Path 1 ` Path 2 <br /> Notes: a) This table assumes 20 feet of smooth unobstructed round 3`inches 50 cfm 35 c£m 15 cfm <br /> duct with three 90°elbows and a screened hood 4 inches 90 cfin 60 cfm 30 cfm <br /> b) Equivalent designs calculated using pressures of 50 Pascals 5 inches 140 cfin 104 cfm 45 cfin <br /> for Path 0, 25 Pascals for Path 1, and 5 Pascals for Path 2 6 inches 200 cfrn 140 cfm 65 cfm <br /> may be used. 7 inches 270 cfin 190'cfin 85 cfm <br /> c) Ifa make-up air opening:is used with no dact or elbows,the 8 inches 350 cfm ' 250 cfin 110 cfm <br /> Diameter can be decreased by 1 inicn. 9 inches 450 cfm 320 cfin 140 efm <br /> d), If flex duct is used,increase diameter b 1 inch. 1Q.inches 570 cfm 400 cfm 180 efm <br /> Make-u Air A lication/Location CFM '' O enin size Duct T e' <br /> ❑Smooth ❑Flex ❑O enin onl <br /> ❑Smooth ❑Flex ❑O enin onl <br /> ❑Smooth ❑Flex ❑O enin onl <br /> ❑Smooth ❑Flex ❑O enin onl <br /> AGGREGATE MAKE-UP AIR WORKSHEET <br /> INSTRUCTIONS <br /> Step 1. Complete Exhaust Schedule on the right indicating cfm of largest device in each category. EXHAUST SCHEDULE <br /> Step 2. Complete the Combustion Equipment Schedule on preceding page. DEVICE CFM <br /> Step 3. Choose a path with a Y(Yes)for all selected equipment. Clothes er <br /> Step 4. Complete Aggregate Make-up Air table below for chosen path.Using the total cfin from the Kitchen e�chaust " <br /> Fxhaust Schedule,indicate flow in cfm for proposed method(s)of providing make-up air. Other exhaust <br /> Step 5. Fill out the Passive Make-up Air Opening Schedule above. TOTAL <br /> ❑ Path 0—Aggregate Make-up Air Method Passive Passive Powered°Make-up <br /> Infiltration O enin <br /> Passive infiltration for up to'425 cfin <br /> Passive openings for cfms over 425 <br /> Powered to match flow for cfms over 985 <br /> ❑ Path 1 —Aggregate Make-up Air Method Passive Passive Powered Make-up'' <br /> Infiltration-- O enin * <br /> Passive infiltration up to 175 cfrn* <br /> Passive openings for cfms over 175 <br /> Powered to match flow for cfms o�er 565 <br /> � If a closed controlled solid-fuel burning appliance is installed in Path:l,then a passive opening must be installed to ptovide xnake-up air far <br /> the clothes dryer and for any central vacuum that exhausts to the outside: <br /> ❑ Path 2 —Aggregate Make-up Air Method Passive:: Passrve �owerea <br /> Infiltration O nin " Make-u <br /> Passive openings for up to 175 cfin <br /> Powered to match flow for cfms over 175 N/A <br /> ❑ Path 3 —Aggregate Make-up Air Method Passive Passive Powered <br /> Infiltration O enin Make-u <br /> Powered to match flow N/A N/A <br /> 15 <br />