Choose the right Ventilating Fan

Choose the right Ventilating Fan


Step 1
Determine the room size: Length x Width x Height (in metres).
Example: 4 x 4 x 3 = 48m³

Step 2
Determine Air Change Per Hour (ACH) in your designated area. Refer to table below.
Example: I am choosing a ventilation fan for public toilet. Based on the table below, the figure is 20.
 
I: Type of Room II: Necessary frequency of ventilation per hour
  I II   I II
Hotel Dance Hall 8 Photo Studio Darkroom 10
Dining Hall 8 School Laboratory 6
Kitchen 15 Cooking room 15
Hallway 5 Auditorium 6
Toilet 5 Gymnasium 8
Lavatory 10 Toilet 12
Boiler room 20 Library 6
Laundry 15 Classroom 6
Hospital Operating Room Waiting room 10 Theater Auditorium 6
Clinic 6 Hallway 6
Ward 6 Smoking room 12
Bathroom 5 Toilet 10
Office 6 Projection booth 20
Restaurant 8 Workroom 6
Kitchen 15 Telephone switch board room 6
Gallery 5 Factory Painting room 20
Toilet 10 Dynamo room and substation 20
Boiler room 10 Condenser room 15
Laundry 15 Office 6
Operating room 15 Restaurant & Snack Bar Restaurant 6
Disinfecting room 12 Library Reading room 6
Rooms for patients receiving medical treatment for diseases of respiratory organs 10 Office building Office 6
Public Toilet   20 Waiting room 10
Home Kitchen 15 Conference room 12
Living room 6 Display room 10
    Toilet 10


Step 3
To calculate air flow required: Room size x Figure indicated in the table
Example: 48 x 20 = 960cmH

Step 4
Select the type of fan, such as wall or window-mounted; or non-ducted fan based on installation method, application and site requirement.
Example: A wall-mounted fan is selected based on site conditions.