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' �/y��-�a� S�I��,E'v� <br /> �� • ���o� <br /> 134b.6012 IFGC APPENDIX E,WORKSHEET E-l. <br /> IF�C Appetul�t E�Worksheet E-1 <br /> R�iden�af Combustlon Atr Cakxx�a�on Method <br /> for Fumac�,Boiler,andlor Water Heater Ie the�me S <br /> Step 1: Complete vented combu8on appligce infortnation: <br /> FumaodBoiler. <br /> Dreft Fi�d Fan Assfated,�Dh�i Vent Inpuk��tulhr <br /> (Not fen Assisted) &Pa�wer Vertt <br /> Weter Heaber: <br /> ,Dratt Hood �Fan Asslsted �ired Vent Inpu� ��tufir <br /> Not fan &Power Vent <br /> 6tep 2: Celcula6e the�Iume of tlre Combusdon Appliance Space(CAS}contafning oombusdon appl�nces. <br /> Tf�e CAS Ir�udes aq connected to one enother �d�com rant o enln CAS voiwne: ft3 <br /> Step 3: DeiermUte alr Changes per Hour(ACHp <br /> Default ACH valuea have been incorporated Into TeWe E-1 f�r use wUh Method 4b(KAIR Me�od).!f tlre year of cor�sGtuction <br /> ar ACH�rmt Imo�m,usa me#hod 4a Standard Meth . <br /> S�ep 4: D�ne Required Vdume for Combustton A�. <br /> 4a Standard A6ed�od <br /> Total Btulhr input of all armbusiion applfant�,s(DO NOT COUNT bIRECT VENT APPLIANCES)In�t 1 I��Btuthr <br /> Use Standerd f�Hbd cdumn in Table E-1 to��1 To�l Required Volmne(� TRV: DO ft3 <br /> N CAS Volume(from Step 2)�s greafer than TRV then no outdoor ap�ings are ne�ed. <br /> If CAS Volume(firom SFep�la less fhar►TRV tlten go to BTEp 5. <br /> 4b. Known Air Infl�raUon Rate(KAIR}Method <br /> Te6al 86ufir fiput oi all fan,assisted ar�d power v�i appqences <br /> (DO NOT COUNT DIRECT VENT APPLIANCES) �nput�I��Bkrfhr <br /> Use Fan-Asslsted Appl�nces celumn in Ta�e E-1 to flnd � <br /> F�equired Volume Fen Assi�ted(RVFA) RVFA �dD�3 <br /> Tota{Btulhr input d all non-fan-�sisted appGanoes Inpu��Bh�lhr <br /> Use Non-Fan-Assisted AppAanoes calumn in Table E-1 to firud <br /> Requhed Volume Non-Fana4es�ted(R1/rdFA) RVIdFA�R3 <br /> Total Rsquhed Valume(TR1�=RVFA+RVNFA TRV=�,+�_e�� <br /> If CAS Volume(from St,e,�2)ts greatesr d�TRY then no outdoor openirqgs ere needed. <br /> If CAS Volume 2 fs ksa thar�TRV then o b 3TEP 5. <br /> Step 3: Cal�late ifie ratio of avaltable interior voUime to the tote!re�uire�volume. 0 8 <br /> Ratio=GA5 Vduroe lrom Ste 2 dtvJded b TRV from Ste 4a or Ste 4b RaHo��1 0= •� <br /> Step B: Calculate R�luc�on F�ar(RF}. � <br /> RF=1min�s� RF=1-o 7�= ��� <br /> Step 7: Galca�la�e single outdoor opening as if eli oombustion air is bom ou�ide. <br /> Total�ulhr input oi ad Combu�ion Applient�in tl�e same CAS{EXCEPT DIRECT VFNT)Ir�put,�Btuihr <br /> Combus�on Air Opening Area(CAOA): <br /> Totel�ulhr ettrla�ed 3ffOD Bbufir in� CAOA= � l�3U00 BtuThr er in�_�� i� <br /> Step B: Galculate Minimum CAOA. s <br /> Nfmimum CAOA=CAOA multi ed b RF Minimum CAOR=�J M t `� = -�in� <br /> Step 9: Calculete C.�mbUstion A(r Opening Diameter(CAODj ,f <br /> CAOD=1.13 m b the s uare roat of Minirnum CAOA CAOD=1.13 x R�inimum CAOA=�•��in <br /> �If desired,ACH can k�determined using ASHRAE caicutatlon or blower door test.Fall�v pro�dar�s in Sedion 304. <br /> 5$ <br />