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f�R-24-2013 11:00 From: To:7633909039 Paee:l�i <br /> Directfons-7he Minnesodv fuel Gas Code method ro cvlcu/ote to size ef a required combustlon oir open;ng,is called the Known Air <br /> !�'rltrotion Rofe Methvd- for new oQnrtr�,,/b of st,ep 4 ts,tyuiri�d to be jllfrd out <br /> iFcc qppendb��,wo►�csheet e-i • <br /> R�identiel Combunlp�Ai�Ul�ulnipn M2ttwd , <br /> (for Fumace 8oiler o►Water Heater in the Same ) <br /> Soep i:tampkte vemrd eombuatmn appliance Infwmation. <br /> Fumace/Boiler. � <br /> • _Drak Hpod fan Itssiated �Dirett Vent inp„r. ;b O�� <br /> or Power Veni <br /> Water F{��; �/ ' <br /> �Orah Hood �Fan AsststeC _Oirect Vent Input / ��,4d�h� <br /> or Pawe►vent <br /> st�2:L�kulatE the v0lume of��pmbustioll Appfisnca Spate�CJ15)containing com'ti�tlpn spplianceR � <br /> The G0.5 tiuludes atl spaees connected to one mother by cade cer�pfiar�t In <br /> �u _ °P�^ BS• CAS voluma: � ft° <br /> LxWxH L . W��H <br /> Slep 3:Determme p;r Chan6a per Mour{ACH)1 <br /> Defauk A�►�yaluls have heen ineorporemd Into Ta01f E-1/pr vse witM Me[hod qb�I�AIR M�q�pd), <br /> If Me r of�p��n w ACN is not krrown we method 4a($p�d0rtl Method).; <br /> Step 4:De(e��pe Required yolume for CombusUon Air.{DO NOT GOUP(i' Drt�G7 VEPR pppUqryCES) <br /> �e.Stendard Mechod � <br /> Totet Btu/hr input of all comDustio�aDpliances �nput I�;,1`OOC�p�/h� <br /> Use Standarcl Meehod column in Tabte E-3 to f1nG Toral Requircd TRV;���h� <br /> Volume(iRV) <br /> �t cA5 volume(�rom steP 21 k prel�Ml'tl[�1pv ehen no outdoor openings arc r�eedad: <br /> + It CAS VOlume(frorn Step 2(!s A�th�n TRV Clen go to STIP 5. . <br /> �b.Known Nt��Itntion Rne(KAIRj Method(p0 NOT COUNT OIRECT VENT APAUIW�$) <br /> Totel Btu/hr input 0�ell faD-nstsced A11d power veat appti�ntPs Ir�puN � Btu/hr <br /> Ux Fsn-AsSateC Appliao�es cplurnn in Table E-3 W flntl RVFA: {� <br /> Requir�Volume Fan/1ssi�ad(RVFA) � <br /> Total Btu/hr tnput of an N�tural dratt avvGsnces Inpy�;_., _�g�� <br /> Use Naturol dreR Appltances mlumn in Tabla B-1 to flntl qVNfA:T�n+ <br /> Requked�oiume Natural drpR apppaneas(RVNpq) . <br /> Totai RequifAd Yokune(TR�=RVFA+RVNDA TRV= +,_�= T�� <br /> �F CAS VWume(frpm Step I)B jpep4e�tl1m)TRV then np Wtdoor Opanings are needed: <br /> ir CAS Vdume(irom Ste 2 B less tha�TRV ther► ta SrEn S,. <br /> Step S:Calculate Me retio of ar�ilable interior wlume rn che tote�required volwne, ' <br /> liitb=CAS Vtlume(from Sttp 2)�Bdded by?RV(from Step 4a or Step Ab� <br /> rt.ao.���fs �3dioo = • 4/G <br /> Step 6:�u�dte RetlWction FacWr(RF), . <br /> RF e 7rMblut'RaNO �a 1- .• 4 ��p a � <br /> ftep 7:Caiculau�in�p ou�tlobr opening et�F a9 tombustion^d�r is ffom outalde. � <br /> Tvql 8tu/hr Mput M a►1 Comb�Applqnoes in the same CAS �' mpuT; �}Q�c,�dQ Bh,/hr <br /> (fi7(CEP7 DIRE�T VENT� . • <br /> Cvmbustian Air Opening AIEa(LApA�: <br /> TataLB hr d�etlby 3000 Btv r r in' ` UtOA= 3000&u/hr a in=• / � fn� <br /> Sbap B:Calculate M�nimum GOA <br /> ? Minimum GOA=GAOA m kd RF MifNmum GOA= �3 l J �, = i 3 ��� in= <br /> StRp 9:Galtulate[omp�sppn qir Opening Diam�er(GA00) ' <br /> CAO�=1.IH m�by the�+one root.oJ Midirr��ium Cp,O S CqpD=1.13 J INlnimum GqpA•��•n.tCiameter d�i r� <br /> u one inch in si=e if usin flex du�t """""""'�""' ,� � ��.� <br /> 1 If desired,A[H pp tl�dltE►minEd usinp ASMqAH eakulition or blpwet door tQst Folbw prp�ures in Sectbn 1 � <br /> G30A. ' <br /> G:�Forms\VeMhAakupComW�irtalsalSiLdoa Page S o�'6 <br />