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fROM angell aire inc 952-746-5202 {WED)MAY 1 2013 8:30/ST. $:29fNo.83�3213136 P '7 ' ' <br /> Dircctions-The Minnesora Fuel Gus Cade mechod ro calculate co sfze of a required com: �stion arr ope�ing,ls called the Known A;r <br /> lnfiltratlon Rate Method. For i,ew construttion,46 of step 4 Is requ;red to be flfled ou� <br /> 1FGC Appgnd'u�E,Worlcsheet£•1 ' . <br /> Resideotial Combustion alr Celculatton Mechod <br /> Ifor Fumace,Bojler and/or Water Heater In the Same SDace) <br /> 5tep i;Compiete venced combustlon aDPrance Information. <br /> FurnaCelBoiler: � ' <br /> _pratt NOfld ^, Fan ASSISLQd �plreci Vent Input: /Q��gty�}�� <br /> or Pqwer ven� <br /> W8t2r Meater, / /J <br /> _DraR Hood � Fan Aaslsted _D71ea Vent �nput: 7S��Ov gtu/h� <br /> or Power Vent <br /> stov zs Calculata the vofume of che Combustion Appnance Spaee(GAS�containi�g eombustton appliances. <br /> The CnS 4+ctuaes an�paces connected to onc another by code wmptlant opemngs. �A:.v0luMe: �y �_,{�' <br /> ?�a� �r9 <br /> Step 3:Detefn+ine Alr'Changes per Neur(ACii)1 <br /> Default ACti values have been I�eorporoted into Tahle E•i tor�se with Method 4b(IWR Method�. <br /> If the ear of eonsavccion or pp�t Ls nnt known,use meehod 4a(Scanda+�d hteehod�. <br /> Stcp 4s Determine ReQuired Volume far Combus�ipn Alr.(DO NOT CDUN7 pIRFGT VENT APPCWNCES) � <br /> a+.Standard Method <br /> TOte�Btu/hr Inpwt p�e�l eombustion applla�tes Inp�t; Btu/hr <br /> Use St2ndard Metnop eolumn i�Table E-1 to(►nd Tota1 Requlred TRV; ft� <br /> Vplyme(TRV) <br /> If Cti5 Votume�from Step 21�,preater than i'RV[tien no outdoor openings are needed, <br /> Ii Cq5 Volume(trom Seeg 2�!s tess than TRV chen go to STBP 5. <br /> 4b.K,lown Air InHlcretlon Rate(KAIR)Methpd�00 NaT CQUNY p1REGT VENT APPLIANCES) �I <br /> Total 9to/hr input of all t�n-aulsted a�d oower v�nc avpllances Ir+put: I,S�OO_�/ox„�„ <br /> use fae.Asslsted Appliances coiumn In Table E-1 ta Et„d at�q: c�li,,7J h3 <br /> Requlred Volume Fan Asslsted(AVFA� <br /> Towi atu/hr i�puc ot au Natural deak appGances Enput; r Q _g�/h� <br /> Use Natural Crah Apptiances solumn In Table 8-2 to find RVNFA; �/�h° <br /> Required yulume Katurai draft appilantes{RVN�a1 <br /> Total Rcqulred Yo►ume(TRV)=RVRA+RVIVDA TAV� O G�.� { G�'J��/ s �C,�� .�V,�� <br /> If fA5 volwnr(Fr�m Step 2)!s gieater thpn TRV thcn no outdoor operungs are needed, <br /> if CAS Volume 4from 5[ep 2)fs tes.x rhan TRV then go to STEp 5, <br /> Stlp 5:Calculate Ne rptlo o�evailable Interto�volume to the tneal repuired volume. ' <br /> Ratip�CAS Vqlume�hom Step 2)dlvlded by7RV(from Step 4a ar Step 4b) <br /> /5/y9 �c�G� ''' <br /> {L8L�0 s a <br /> Sttip 6:Calculate tteduu�on Pactor(RF�, �— <br /> RF=ll++lnusReUo RFvl• ���0 ' � I �y <br /> Sccp 7:Ca{cutate ytngle outdow opnning as It all�pmbustion alr 15 fcom outslde. . <br /> Totol 9�y/hr I�put of�0 Combustlon Appllan�s in cl�r asme G�5 Jnput: �DT D gtu 'sr <br /> (EXCEPT DIRECT HEN'r} <br /> GombusUon AIr Opening Ares(C�►OA�: <br /> Total Btu/hr dfvfdeAby 3000 Bt�/hr per In= CAOA.7,r'D(/O '� <br /> /3o0Q Btu/hr per in'■ S In= <br /> Slep 8;(�Icutat4 M(nimum�AOA. <br /> Mintmum CnOA=CApA�rw/tlylfcd b RF Pv{irtimum CApA a i�t� x �'y a �� ���_ <br /> Step 9!Cal�ulate Cortlbusdon Ak C7p�ing�lametg�ICAOG) <br /> GAOD■1.13 mu1llp!!cd 6y the�are�r o���M1�mum CAOA CAOD.1.13 Y Mlntmum CAOA e ",��{n.dfameter <br /> go u one Ine�+ln slze If usin Rex duct a Q „p� �� �/ <br /> i tf desired,ACN CAn be determined using ASt1RA&ca�cuiauon or btower door tes� ollow proc�d,ucs In Sectl <br /> G304. <br /> Pagp 5 of� <br />