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• <br /> ` PAS:IYE I KE TP AIR. OPENING SCHEDULE <br /> TABLE F© x SIZING PASSIVE I E UP AIR OPENINGS Diameter Path 0 Path 1 Path 2 <br /> Notes: a) This ble assumes 20 fee Ismooth unobstructed round 3 inches 50 ofm 35 cfm 15 cfin' <br /> duct ith three 90°elbows:. d a screened hood 4 inches 90 cin 60 cfm 30 cfin <br /> b) Equi lent designs calcul• .d using pressures of 50 Pascals 5 inches 140"cfm 100 cfin 45 cfm <br /> for P h 0, 25 Pascals for th 1, and 5:Pascals for Path 2 6 inches . 200"cfin 140 cfin 65 efin <br /> may b used. 7 inches ' 270 efm 190 cfm 85 cfm <br /> c) If a m ke-up air opening is. ed with no duct or elbows,the 8 inches 350 cfm 250 cfm 110 cfm <br /> d <br /> Diameter can be decrease "1,1 "1 inch. 9 inches 450 cfm 320 cfin 140 cfin <br /> d) If flex duct is used,incr'eas; `ianteter by 1 inch. 10 inches 570cfin 400 cfm 180 cfrn <br /> Mak--up Air Applicatto 3. ocation CFM Opening size Duct Type <br /> ❑ Smooth ❑ Flex ❑Opening only <br /> ❑ Smooth ❑Flex ❑Opening only <br /> ❑ Smooth ❑Flex ❑ Opening only <br /> ❑ Smooth ❑Flex ❑Opening only <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 dryer <br /> Step 4. Complete Aggregate Make-up Air table below for chosen path.Using the total cfm from the Kitchen exhaust <br /> Exhaust 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 i'assive "' passive Powered Make-up <br /> lnfiltralion Opening <br /> Passive infiltration for up to 425 cfin <br /> Passive openings for cfnts over 425 <br /> Powered tomatch flow',for cfrns over 985.. . <br /> ❑ Path 1 —Aggregate Make-up Air Method Passive . Passive Powered Make-up <br /> Infiltration +opening* <br /> Passive infiltration up to 175 cfm* <br /> Passive openings for efts over'175 <br /> Powered to match flow f.r cfms over 565 <br /> * If a'closed controlled olid-fuel burning a.1. ce"is installed"in Path 1,then a passive opening must be installed to provide make-up air,for <br /> the clothes dryer and or any central vacu , that exhausts to the outside. <br /> ❑ Path 2 —Aggregate Make-up Air Method Passive' Passive Powered <br /> Infiltration Opening Make-up <br /> Passive openings for up td 175 cfm <br /> Powered to match flow fat cfins over 1.75 .. N/A <br /> ❑ Path 3 —Aggregate Make-up Air Method Passive, Passive Powered <br /> Infiltration; Opening Make-up <br /> Powered to match flow i i 1. N/A N/A <br /> 15 <br />