Air Intake Louver import companies and air intake louver import trade opportunities Heating - Cooling - Ventilation

i need industrial exhaust fans We request the following : 1- ventilation louvre with sand trap and filter (hole on the wall 100*100) the quantity =8. 2- sand trap louver 100*100 cm + wall type fan 2260 M3/h. quantity = 2 3- Fresh air intake louver with sand trap 25*40 cm 360M3/h quantity=2 4- Extract fan 10000M3/h hole on wall= 80*80 quantity =7 5- sand trap louver with fans 100*100 cm 2260 M3/h quantity= 2