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Diredions-The Minnesota Fuel Gos Code method to�a���41s requlred to 6e�JNfed out.u�ton air opening,is called the Known Alr <br /> infil[roUon Rate Method• Fo�ne�+'�°^�'�D°'�°f�ep <br /> 1FGC ApDendix E,WorksheM E-1 <br /> RlSidMtiB�COrt�bU5L�0�AIf C31CU13t�00 Metfiod <br /> (for Fumace,BW�er,and/or Water Heater in the Same 5 ace <br /> Step 1:Comple[e vented combustton appiiance information. <br /> Pumace/Boi�er. �pi�Vent Input: D��B�u/hr <br /> pro{t Hood Fan Azsis[ed <br /> orVowerVent <br /> WBtCf F12dt8f: �/ Input: ����JU l� BtU/hf <br /> Drak Hood I'"Fan ASslitetl _Direcc Vent <br /> or Power Vant <br /> Step 2:CalCulate[he voiume of the ComG+stlon Appliance Space(CAS)containing combustion app�bn��ume: ����ft� <br /> The CAS indutles ail spaces connecte0 20 one aoocbar by code�c�PH���t openinQSL W H .3 70 X <br /> SHp;:Determine nir ChanQes per Hour�ACH11 <br /> DePoult ACH values have been incorporated int0 Tabk E-1 fOr Use wtth MethoC�b f��R Methotl). <br /> If[hC Ed!Of COOStNR�c�or ACH h not known,use method 4a(Standatd MOthOd. <br /> Step 4:Detertl��t12 R2qU1tCd VOIURIE TOf CAmbu5t10�Alr.(DO NOT C�UN1 DiRECT vEN7 APPLIANCFS) <br /> �a.Standard Method ��P�t: Btu/hr <br /> Tot21 Btu/�r input�of all combustion aPP�'a"�� TRV' ft� <br /> Use Standartl MethOd[olumn in Table E-i to find rocai Reqw*ed ----- <br /> Volume�TRV) <br /> If CAS volume(from SMP�1�*a�a��on TRV then rro ou[Ooor openings are needed. <br /> If CAS Volume�hom Step 2)b fess tho^rRv rhen go[o SiEP 5. <br /> 4b.Known Air Infiftr3tion Rate(KNR)Method(DO NO7 COUNT DiRER�M��� �Jr Btu/hr <br /> Totel etu/hr I�Put of all bn-�ssisted and pow�r wM epp��anCBS <br /> Input <br /> Use Fan-Asslsted ApPAances column fn Table E-1 to find <br /> RVFA:��SC.� R' <br /> RQquired vdume Fan Assisted IRVFA) f� <br /> Input: <br /> �'� Btu/�� <br /> Total Btu)hr input of all Naeural dnR appiiences � <br /> Use Natural dnft App�iances co�umn in 7abk E-1 to flnd <br /> HVNFA: n� <br /> ReqWred volume Natura�drak npd�a^����A� ��(J �yV ft' <br /> TOtal REqU1�Etl VOlUfne(TRY)�RVFA+RVNDA <br /> rnv=S�SU .�.�—� � <br /> If fA5 Volume Ifrom Step 21 it 9�er than TRV then no outdoor ope�ings are needed� <br /> if LAS Voiume(from Step 2)Ir lers tAon TaV then o to ST6P S. <br /> Step 5:Cakulate the ratio ot avalWlNe�ntenor�vV(from Step 4ator Step ab)�uTe U J .j�� . <br /> Ratio=CAS Volume(from Step 21���bY Ratfo= ��7 f <br /> Step 6:G7fculBte ReduR�on Factor(RF�. y � <br /> RF=i- � F ' <br /> RF=1 minus Ratlo <br /> Stap 7:talculate singie outdoa openlo8 u if a11 combust�on atr is from outside. InPur �U�a,� g��r <br /> liances in the seme CAS �—�— <br /> Totel Btu/hr fnput of a�l Combustbn npp <br /> �FJ(CEPT DIRECT VENT) <br /> Combustion Alr OpeMng Area f�OA): �p,OA�'7��(LC.��3app gt�/h� r In'_ ''?K`�'� In' <br /> Total BtuJhr dlvidad b 300D etu/hr er in' <br /> Step fl:Cakulate Minimum CAOA. l, ,/ <br /> Mfnimum CAOA=CAan muldPlled RF Mtnimum UOA= (� <br /> .�"i�6�o x .3 = `'Ji`A �n' <br /> St�p 9:CeIcul2tE Com6u5ti0n Alt Op2t1�nB Dl3mttBf{CAOD) ' �3 X a�"�Z f ,1�� <br /> tn.die <br /> fAOD•1.13 muhtpUed bY th��9°OK root cf MiMmum CAOA CAOD=1.13�Minlrt�Ufn CAOA�� <br /> o up one inch in size 1f using tlex duct r door test Fdlow procedures in Section <br /> 1 If desrced,ACH an be detertnined using ASHRAE cakulatfon of blowe <br /> G301. <br /> Page 5 of 6 <br />