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DEC-1l6-c^Ctl34 10�32 From: To:2578656 P. 1�'1 <br /> FINISHING CONSULTANTS �,�,,,�,, ;,Y ��,�tr: <br /> qOIVISIfRlUFMAN�JFG�TIJMFR�A�:f111iNpk1NM251.1NC hVtHtTi.WA9Ht'1GTCN <br /> 'i8]Od <br /> iOLLF1iFE 170051app95 <br /> lULL FFEE FA% 1 97]71B 1195 <br /> S(�VC �V�1���'f <br /> I?verett Ruildine and F.n�inearine <br /> Stcvc, <br /> llere is the exampie that demonstrates the calculation of the NFPA section denling with <br /> makaup air. <br /> If the ��olumr of a particular buildiug is 200.0U0 cubic fect <br /> nnd lhe e�hauxt lan c�pacity is 10.000 cuhic leel Per minule <br /> In 60 minutes tlie e.�haiist fan will move 600,000 cubic feet oFair out�f tiie facilic��. <br /> Theoreticnlly, lhere will be tlu•ee complete ch:tnges of air in thc lacility in one hnur. <br /> 600,000 divided hy 200.000 equals 3. <br /> In this case, the volume of the building(20U,ODU cubic fcct) is 20 timcs grealer than ihe <br /> capaciiy of thc csliaust fan (10,000 cf'm). <br /> I bclicvc that tl�e inteut of the se�fion is to state that nu mure I�eyuent air cfi�ngcs arc <br /> allowable as you are retyiug on naturnl infiltration to replenish the nir in n Iflrgc f�ciliq. <br /> ln rhe netunl c<�se thflt 1 am working ou u�itl� Sign Tech �nd their facilit}•. <br /> 'Chc vulumc ul�he ruom where manulacluring �rill ucctu is approximately 840,000 cubic <br /> te�t. <br /> The r�h�iut fan capacity is 18.000 cubic feet �r minute. <br /> ln b0 minutes che exhaust fan will move 1 ,OR0,000 cubic fcct uf air. <br /> ln this cnsc thc air cl�aug��s will bc appruximatcly 1.29 per hour or less than V2 the rate <br /> tl�ut is slio.vn ns the maximum nllo�vcd. <br /> I.ct mc knnw i f this explains this ��� your satisf:�ctiou. <br /> Jrtl L��Sorrlla <br /> r�-� <br /> ��/1�---, J <br /> ��_; %� � <br /> SPRAY SY5TEM5, PUMPS, BOOTHS. OVENS. AND DUST COLLECTION <br />