How to select the correct fan

How to work out the size and type of fan required: Image Download PDF file
In order to provide adequate ventilation for a given application, it is essential the
correct size, type and number of Hydor units are selected. Selection of the correct fan depends on two
principal factors: the performance and application.
Step 1
Determine which mounting arrangements meet your requirements
Step 2
Calculate the VOLUME of the room in cubic metres (m3) by multiplying the length x width x height.
Step 3
Select the type of room from the AIR CHANGE GUIDE and how many air changes (AC/H) are required.
Step 4
Use the following formula: Volume (m3) x AC/H = Airflow (m3/h)
Step 5
Use the catalogue to select a fan that does the airflow you require.

Air Change Guide

COMMERCIAL AC/H DOMESTIC AC/H
Assembly rooms  4 - 8 Bathroom  6 - 10

Bakeries

20 - 30 Bedroom 2 - 4
Banks 3 - 4 Cellar 4 - 8
Cafes, Coffee Bars 10 - 12 Garage 6 - 8
Canteens 5 - 10 Kitchen 10 - 15
Conference Rooms 8 - 12 Laundry Room 10 - 15
Dance Halls 6 - 8 Toilet 8 - 12
Entrance Halls 3 - 5    
Hair Dressing Salons 10 - 15    
Laundries 15 - 30    
Lavatories 8 - 15    
Libraries 3 - 5    
Offices 4 - 8    
Photo dark rooms 10 - 15    
Recording Studios 10 - 12    
Restaurants  6 - 10     
School rooms 2 - 4    
These values must not take the place of any regulation requirements and can be modified for particular applications.
Dependant on volume one or more fans may need to be selected
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