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The contents of this install guide are copyright protected and may not be reproduced in any form without prior written consent of CSR. Recommendations and
advice regarding the use of the products described in this guide are to be taken as a guide only, and are given without liability on the part of the company or
its employees. We reserve the right to change product specifications without prior notification, please refer to the CSR website for the latest version of this
document. The purchaser should independently determine the suitability of the product for the intended use and application.
2.
VENTILATOR POSITIONING & PROVISION FOR MAKE-UP AIR
CSR Bradford Ventilation recommends that ventilators are positioned 4m to 6m away from each other in all
directions for effective and efficient performance. It is also recommended that ventilators of the same size
are used together to prevent replacement air from being drawn between ventilators of different sizes.
Ensure that the ventilators are not sheltered from the wind by surrounding objects, the shadow angle
created by the roof ridge or by each other.
Make-up air is required for this ventilator to replenish the exhausted air. As a general guide, the largest
make-up air entry should be positioned on the opposite side of the building to the largest ventilator demand.
The make-up air location should be positioned at optimum height to provide efficient sweeping of the floor
area.
The illustrations below provide a number of generic ventilator and make-up air layouts but it should be
noted that a whole-of-building assessment, as per AS1668.2, should be conducted by a suitably qualified
person prior to deciding upon site-specific ventilator and make-up air placement.
IMPORTANT
: If external make-up air is insufficient, the ventilators will draw make-up air from each other –
this will both diminish the effectiveness of the system and increase the risk of the system drawing external
water into the building during periods of rain. It is also recommended that ventilators of the same size are
used together to prevent replacement air from being drawn between ventilators of different sizes.
