Number of Natural Roof Ventilator by Area Calculations
For Model : A-14S, A-18S, A-22S, A-22, S22, A-25S, A-25, S25, A-30 and A-39
1. Area Calculation
Formula :
(Put Building Dimension)
Width
x
Length
x
Height
90
x
120
x
5
Building Volume =
54,000.00 M3 (CU.M)
2. Airchange Calculation
Choose airchange / hr. classified by the utilization.
Utilization (Installation Area)
AIRCHANGE/HR.
Warehouse
5-7.5
Worker Area / Factory
10-15
Machine Area / Manufacture
15-25
Kitchen (High temperature Room)
25 or more
Spraypaint Chamber / Pollution Room
30-100
Formula
Building Volume
x
AIRCHANGE
/HR.
÷
60 minute
54,000.00
x
25
÷
60
Total Airchange Volume =
22,500.00 CMM.
3. Number of Power Roof Ventilator Calculation
Capacity of Power Roof Ventilators in each model :
A-14S
=
33 CMM.
A-18S
=
43 CMM.
A-22S, A-22, S22
=
80 CMM.
A-25S, A-25, S25
=
90 CMM.
A-30
=
111 CMM.
A-39
=
162 CMM.
Formula : ( Choose the model for installation ) Example MODEL : A-25S
Total Airchange Volume
÷
Capacity of each model.
=
Total Number for Installation
22,500.00
÷
90.00
=
250.00 Sets
** Calculation can be varied in utilization which also depend on condition of each building ** Remark : Example is for installation of ventilator in manufacture or machine area.
