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13:16.6012 IFCC�I'#'CVDI\ E. tiV()RKSHE:E7' Gl. <br /> (f GC A�end"rx E,WorksheetE-1 <br /> Residentiai Cflmbt�.s�ion Air Calculation i�l�ihod <br /> Ior Furnace,Boiler,andlor Water Heaier in the SameS ace <br /> S tep 1: Cornpleie vented combution ap�iace iMormation: <br /> FumacelBoi�r: 'OC?Ci�c) <br /> Draft Hood Fan Assi�ted �pirect Vent Input: ' Btun�r <br /> (Not tan Assistedj &Power Vent <br /> Water Heater: <br /> �,Draft'Hood Fan Assistec! ___,_Oirect Vent Inp�i:7�Bt�thr <br /> W�t fan Assisted &Pourer Vent <br /> S tep 2 Galculate the aolume of tfie Corr.bustion App�ance Space(CAS)ca�cai�ing combusiion applaaric�s.. <br /> _ The CAS includes aA ces connected to one ancither b code com iant ni s. CAS vdurc�e: j��fty <br /> S bep 3 Oetermine aav Changes per How(AC1i�� <br /> Oefa�t ACH vaiues have been incacporated�to Tabla E-t tor use with Method 4b(KAIR Method).1f ihe year of construcacn <br /> or ACH is not known.use method 4a Standard i�eihad. <br /> 5 tep 4 Deiem�ine Required Voiume far Combustion Air. <br /> ; 9a. Standard MeUmd <br /> � Tatal Btuthr input o1'all canbusti�appliaraces(pp 1VpT Cp�NT OIRECT VENT APPLtANCES)Input:`����l;hr <br /> Use Standard Met#roc!calumn�►Tabie E-i to find Toial Required Vol�ne(TRVj TRV:'37�� R� <br /> If CAS V'o�me(trom Step 2j is gn�a�r tl�an TRV th8n no a�tdoor openf�gs are needed. <br /> If CAS Voh;me{hom Step 2)is Iess tf�an TRV Ih�go io Si�P 5 <br /> 4b. Known Air In6itra�on Rate(KAIR�lylethod <br /> Total BtWhr ir�put of altfar�-assisted and poa+er vent appliances <br /> (DO NOT COUNT OIRfGT VEN7 APPLIANCES) �nput: 8tulhr <br /> Use Fan-Assisted Appliances columa�Table E-1 to Bnd <br /> Requir�i Vdume Fan.As'sisted{RVFA) - RVFA: ft� <br /> Total 8tulhr inpu#ot atl non-fan-assisted appliances Input: BFulhr <br /> Use Non-fan-Assisied A�iiar�es colomn�Table E-1 to f�►d <br /> Requited i/alume Non-fan-Assist�d(RVNFA) RVNFA: k� <br /> Total Required Valum�(TRV)=R1/FA+RVNFA TRV= + - na <br /> If CAS Volum.e(Iran Step 2)is grea�erthan TRV then no outdaor openings are needed. <br /> 1f GA5 Vdume t��n Ste 2 is l�ss than TR1/tt►er► to S TE P 5. <br /> S�ep Sc Calcuta#e tt�e ratio at awa�able'mteMar votume to the total required volume. � 3,��� <br /> Ra2io=GAS Volume !rom Ste divfded b TRV from St 4a cu Ste 4b RaUo=� - <br /> S tep& Calculate Rsduction�actw(RF): <br /> Rf=1 r�r`mts Rado RF=1-N� _ .`� <br /> S Eep 7; Calcufate si�le out�oor opening as i1 alf crxneustion au is irom out�de. <br /> ?5��`� <br /> Tata!Btul�r�puE of aN Combusfion Appllat�ces�the same CA5{EXCEPT DIRECT VENT)Input: ' 8tuihr <br /> Gombustion Air Opening Area��AOA): .?�-rXX'� <br /> Total BtWlu dividedb 3000 8tufir r in� CA(JA= ' t30(10 Btulhr irr�= l�in' <br /> S�ep� Caladaie Mu+fimum Ci40A. <br /> Minimum CAOA=CAOA mr�lti icd b RF Ntinimum CAOA= :�^ x �5�� = 1'��7�`i; <br /> S tep� �alculaie Combust+on Air Opening Diamecer�Cat)0) <br /> CAOD=1.13 muJd iedb tl�s rerootoiMinimum CAOA CAQO=1.13 x�(�lnimumCAOA= � / in <br /> 'lf desired,ACN can be determined using ASHRAE caicuiation or blower dooriesl.FoNowprocedures in 5ec�ron 304. <br /> �l� ,,-,�:�.t� <br /> _ <br /> ___ �� �f�� <br /> >x <br /> � . <br />