2007-P11141 - mechanical - Laserfiche WebLink

Home Browse Search

PASSIVE MAKE-UP AIR OPENING SCHEDULE TABLE FOR SIZING PASSIVE MAKE-UP A.IR OPENINGS Diameter Path 0 Path 1 Path 2 lotes: a) This table assumes 20 feet of smooth unobstructed round ; 3 inches 50 cfm 35 cftn 15 cfm duct with three 90°elbows and a screened hood 4 inches 90 cfm 60 cfrn 30 cfin b) Equivalent designs calculated using pressures of 50 Pascals 5 inches 140 cfin 100 cfm 45 cfin for Path 0, 25 Pascals for Path 1, and 5 Pascals for Path 2 6 inches 200 cfm I40 cfm 65 cfm may be used. 7 inches 270 cfm 190 cfm 85 cfm c) If a make-up air opening is used with no duct or elbows,the 8 inches 350 cfm 250 cfm 110 cfrn - Diameter can be decreased by 1 inch. 9 inches 450 cfm 320 cfm 140 cfm d)' If flex duct is used,increase diameter b 1 inch. 10 inches 570 cfin 400 cfm 180 cfm Make-u Air A lication/Location CFM O enin size Duct T e ❑Smooth ❑Flex ❑O enin onl ❑ Smooth ❑Flex ❑O enin onl ❑Smooth ❑Flex ❑O enin onl ❑ Smooth ❑Flex ❑O enin onl AGGREGATE MAKE-UP AIR WORKSHEET INSTRUCTIONS _ itep 1. Complete Exhaust Schedule on the right indicating cfin of largest device in each category• �i�jAjJST' SC�-IEDITLE itep 2. Complete the Combustion Egarrpment Schedule on preceding page. DEVICE CFM 3tep 3. Choose a path with a Y(Yes)for all selected equipment. Clothes d er itep 4. Complete Aggregate Nlake-up Ai��table be(ow for chosen path.Using the total cfm from the Kitchen exhaust Exl�aust Schedule,indicate flow in cfm for proposed method(s)of providing make-up air. Other exhaust itep 5. Fill out the Passive Make-up Ai��Opening Schedz�le above. TOTAL � Path 0 —Aggl'egate IVlake-Up All' MethOd '.Passive' Passive Powered Mal:e-up Infiltration O enin °assive infiltration for up to 425 cfm ' ?assive openings for cfms over 425 °owered to match flow for cfins over 985 �1 P�th 1 —Aggregate Make-ll� AlI' �8f�'IOC� Passive Passive Powered Make-up' Infiltration O enin * Passive infiltration upto 175 cfm* . Passive openings for cfms over 175 Powered to match flow for cfms over 565 * If a closed controlled solid-fuel burning appliance is installed in Path 1,then a passive opening must be installed to provide make-up air for the c(othes dryer and for any central vacuum that e�chausts to the outside. ' ❑ lPatin 2 —Aggregate 1Vlake-U� �1�T[' �Ct1ilOC1 Passive Passive Powered' Infilfration O enin Make-u ' Passive openings for up to 175 cfm Powered to match flow for cfms over 175 N/A ❑ Path 3 —Aggt'egat� Make-up AIt' 1VIethOd Passive Passive Powered Infiltration O enin Make-u Powered to match flow N/A N/A