IMC 2021  Tbl 403.3.1.1								
Large ClassRoom; age 9 +								
								
Vbz = RpPz + Ra Az								
Rp     =	10							
Pz    =	35	per	1000	ft2    =	13.4	people		
Ra    =	0.12							
Az    =	404.0	ft2    -	5	% for furniture =		383.80	ft2   	
								
Vbz = 	180.39	cfm fresh air per classroom						
								
								
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Small Classrooms; age 9 +								
Vbz = RpPz + Ra Az								
Rp     =	10							
Pz    =	35	per	1000	ft2    =	10.0	people		
Ra    =	0.12							
Az    =	300.00	ft2    -	5	%  =		285.00	ft2   	
								
Vbz = 	134.0	cfm fresh air per small classroom						
								
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Down Stair Office								
Vbz = RpPz + Ra Az								
Rp     =	5							
Pz    =	5	per	1000	ft2    =	0.6	people		
Ra    =	0.06							
Az    =	133.00	ft2    -	5	%  =		126.35	ft2   	
								
Vbz = 	10.7	cfm fresh air per small classroom						
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Up Stair Offices								
Vbz = RpPz + Ra Az								
Rp     =	0							
Pz    =	0	per	1000	ft2    =	0.0	people		
Ra    =	0.06							
Az    =	704.00	ft2    -	5	%  =		668.80	ft2   	
								
Vbz = 	40.1	cfm fresh air per small classroom						
								
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Down Stair Corridors								
Vbz = RpPz + Ra Az								
Rp     =	5							
Pz    =	5	per	1000	ft2    =	3.9	people		
Ra    =	0.06							
Az    =	813.00	ft2    -	5	%  =		772.35	ft2   	
								
Vbz = 	65.6	cfm fresh air per small classroom						
								
								
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Infiltration								
Manual N Table 13b								
								
Number of Students per day per wing =						107.5		
Number of Times Students open door per day =						4.0	times	
Length of Stay =						3.0	hr	
Traffic Rate =						72	/hr	
								
Number of Employees =						8		
Number of Times Employees open door per day =						4.0	times	
Length of Stay =						3	HR	
Traffic Rate =						5	/hr	
								
Total Traffic Rate =						77	/hr	
								
								
cfm Infiltration per door based on traffic rate :						Winter	Summer	
Double door no vestibule has an infiltration rate of 						779	448	
								
Total Door Infiltration in cfm						779	448	
Therefore each corridor with 8 classrooms will get 412 cfm of fresh air during the day.								
								
Each classroom that receives 170 cfm of fresh air from ERV the additional 4 cfm fresh air will come from the corridor.  Each classroom that receives 140 cfm fresh air from ERV the additional 34 cfm will enter the classroom from the corridor.								
								
								
								
Required cfm per wing =			180.4	cfm   x 	8	classrooms 	1443	cfm
in addition each corridor requires							#REF!	cfm
								
		Totals					#REF!	cfm
								
Each wing has an ERV supplying							1300	cfm
Each wing has door infiltration							448	cfm
								
		Total fresh air		"1,748"	cfm  >	#REF!	cfm