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PASSIVE MAKE-UP AIR OPENING SCHEDULE TnsLE Fo[t Siz[Nc PAssrvE MAxE-ur A[x OPEN[hGs Diameter Path 0 Path 1 Path 2 �otes: a) This table assumes 20 feet of smooth unobstructed round 3 inches 50 cfm 35 cfm 15 cfm duct with three 90°elbows and a screened hood 4 inches 90 cfm 60 cfm 30 cfm 6) Equivalent designs calculated using pressures of 50 Pascals 5 inches 140 cfm 100 cfm 45 cfm for Path 0, 25 Pascals for Path 1, and 5 Pascals for Path 2 6 inches 200 cfm 140 cfm 65 cfm may be used: 7 inches 270 cfm 190 cfm 85 cfm c) If a make-up air opening is used witli no duct or elbows,the 8 inches 350 cfm 250 cFm 110 efm Diameter can be decreased by 1 inch. 9 inches 450 cfm 320 cfm 140 cfm d) If flex duct is used,incraase diameter b 1 inch. 10 ioches 570 cfm 400 cfm 180 cfnt Make-u Air A lication/Location CFM O enin size Duct T e ,� �,. 'z� �,w �" ❑Smooth Flex ❑O eninfl onl ❑Smooth ❑Flex ❑0 enin onl ❑Smooth ❑Flex ❑O enin�onl ❑Smooth ❑Flex ❑O euin�onl AGGREGATE MAKE-UP AIR WORKSHEET � INSTRUCTIONS Step I. Contplete Exhaust Schedule on the right indicating cfm of lar�est device in each categoty. EXHAUST SCHEDULE Step 2. Complete the Ca�rbirsrion Eqi�ipn�en!Schedeile on preceding page. DEVICE CFM Step 3. Choose a path wi[h a Y(Yes)for ail selected equipment_ Clothes d er ,�r? Step 4. Complete Aggregate:llake-up Air table below for chosen path.Using the total cfm from the Kitchen exhaust �� Exhaust Schedade,indicate flow in cfin for proposed method(s)of providing make-up air. Other exhaust Step 5. Filt out the Passive illake-up,4ir Opening Schedule above. TOTAL ❑ Path 0—Aggregate Make-up Air Method Passive Passive Powered Make-up Infiltration O eni❑ Passive infiltration for up to 425 cfm Passive openings for cfms over 425 Po�vered to match flow for cfms over 985 Path 1—Aggregate Make-up Air Method Passive Passive Powered Make-up Infiltration O e�in * Passive infiltration up to 175 cfm* �� I / Passive openings for cfms over 17� �� 6 �%�{� Powered to match flow for cfms over 565 * If a closed controlled solid-fuel buming appliance is installed in Path 1,then a passive opening must be installed to provide make-up air for the clothes dryer and for any central vacuum that exhausts to the outside. Q it'�t:i 2—�-^.ggC�gate Make-up Air Metho�' Passive Passive Powered Infiltration O enin v[ake-u Passive openings for up to 175 cfm Yowered to match flow for cfins over l7� N/A ❑ Path 3—Aggregate Make-up Air Method Passive Passive Powered Infiltration O enin Ylake-u Powered to match flow N/.A N/A 1�