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� <br /> Directions-!n order to determrne the makeup air,Tabfe SQ1•�ances or solyd fue(apptfan ciesvare rnstal ed,�use rhe o'ppropra`a e'Umn <br /> A wil!be appropriate,however,if atmaspherFcally vented app" <br /> cofut'nn.Fof exiStfiQ dw8(IfAgS,S�fMG 501•4.3. Please note,if the makeup air quantity rs ne Trans,er the cfm,size of openi�►g a►►d <br /> .p <br /> be requtred for veniilation,if the value is posicive refer to Tabte 501.3.2 and srze the openfng. <br /> type(round,rectongular,flex or rigid)to the lost fine vf sectian D. 'fhe make-up arrsupply must be installed per IMC 5Q1.4.2.3. <br /> Table501.4.1 S�P 2 ��lfi <br /> PROCEDURE TO DETERMiNE MAKEUP AIR 4�A�{�'FOR EXHAUST EQUIPMENT iN DWELLINGS , � r ��Eti� <br /> (Additional tombustton air wiii ha re9uired for mmbustlon apptiances,see KA�A method for caiculations <br /> One or mu{tiple pawer One or mulUple fan- One atmospher+caUy vent Multiple s h ri N <br /> as or al appliartce or vented gas or oii <br /> v e rt t o r di rec[veni assisted appiiances and B liances or solid fuet <br /> appliances or no power vent or direcc ve�t one so ti d f u e l a p p l i a n c e a P P� <br /> appliances <br /> cAmbustion app��ances agpiia�ces Cofumn C Column 0 <br /> Column A Cofumn B <br /> i.Use che appropriate cotumn ta o 09 �Q6 0.03 <br /> estimate housQ irtflkratian 015 <br /> af pressure factor <br /> ��"'�� /�/�� <br /> b)tondiUoned floor area(sfl{including <br /> unf+nished basements <br /> Estimated House tnfiltration(cEm):[la '��� - <br /> x lb] <br /> 2.Exhaust CapacitY �a/ti <br /> a)mntinuous exhauSt-only v2ntlldtlOn ,�]�j <br /> system(cfm1;(nat app�kabfe to �1f <br /> baianced venUlacion syscems suct+as <br /> �R �35 135 135 <br /> b}ciothes dryer(cfm) 135 <br /> c)80%of larges[exhaust rdUng(cfm); �� <br /> KRchen hood typicaliy ` <br /> (not apPlicabie if recircuiating system �� r°1 <br /> or if powered makeup air Is eledrical�Y �� <br /> intehocked and match tv exhaust) ��� �j11�'� <br /> d)80%of next largest exhaust ratirtg � <br /> (cfm); bath fan typicaliy Nat � <br /> (not appticabie if redreulating system qpp�icable /�(j <br /> of ff pOWEred makeup air is electrlcally vo <br /> interlocked and matched to e�chausc ��� <br /> Tota)ExhaustCapacity(cfmj: <br /> (Za t 2b r2t+Zd] <br /> 3.Makeup Qir Qua�ttity{tfm) �(�3 <br /> a)totai exhaust caPadty(�m above) <br /> b}estimated house infiltratSon lfrom / �vt- <br /> a6ove) <br /> Makeup Air QuantitY(cfm): <br /> (3a—3b] y�� <br /> (if value is ne8ative,no makeup atr is <br /> needed ����/� <br /> 4,for makeup Air Opaning Sizing, _ <br /> refet tn Tabte 5Q1A.2 ��v er� �L fJt'�► <br /> A, USe II1�5 GOIUlilft If thelB are Other than fan-assisted or atmospheri�ily vented gas or oil appkiance or if there are no com ustion app�fances.(Power vent and <br /> direct vent appiiances may he used.) <br /> B. use this column if there is one fan-assisted appliance per venting system_(APPliances other than atmosphericallY ventEd applianc.Qs mdy adSban��C�U(�2d• <br /> [. Use this miumn ii there is one atmospheriplly vented(other than fan-assisted)gas or oil app��ancx per ventlng sysiem a�one sntid fuel app- <br /> D. Use this column iP there are muttiple atmosphericat[y vented gas a�oIl appifances us�n6 a common vent or if there are atrnospherfcaUY vented gas or oi1 <br /> appiiances and solid fiiel appliances. <br /> page 3 of b <br /> i:\Buitdingl5dfetYPoticiesinformation\Current\2026\VentMakupCombAirCa1s2016.docx <br />