INDUSTRIAL VENTILATORS - CALCULATION
 

Measurements required In Metres (1mt = 3.28 ft) L - Length of the factory W - Width of the factory Ha - Height of the factory from Floor till the Roof Top Hb - Height of the Side wall from the Floor Hc - Stack Height i.e. difference of Ha and Hb

CALCULATION FORMULA

Volume (a) - Va: 1/2 X L X W X Difference of Ha and Hb
Volume (b) - Vb: L X W X Hb
Total Volume (a) plus (b)

Air Changes per hour:
5 Air Change per Hour - normal prevailing condition


Exhaust Capacity of SLT 18
Stack Height upto 3 M.. 356 X 3.6 (formula)
Stack Height upto 6 M.. 369 X 3.6 (formula)
Stack Height above 6 M.. 388 X 3.6 (formula)

Exhaust Capacity of SLT 24
Stack Height upto 6 M.. 632 X 3.6 (formula)
Stack Height upto 6 M.. 653 X 3.6 (formula)
Stack Height above 6 M.. 689 X 3.6 (formula)

Total Volume X 5 Air Changes per hour
Exhaust Capacity X 3.6
Number of Ventilators = Total Volume X 5ACH divided by Exhaust capacity X 3.6