4.16 Ambient conditions
Ambient conditions can affect the aspirating behavior of the pipe system.
Check the following factors:
● High air speeds
● Frequent change of air
● Fluctuations in air pressure
● Changes in air temperature
● Radiant heat
● High air humidity
● Vibrations
It may be necessary to use an alternative material for the pipe system based on
the ambient conditions.
4.17 Conditions in the room
The conditions in the room being monitored determine the pipe system design and
the position of the aspirating holes.
Take note of the following conditions:
● Does the room have natural or automatic ventilation?
● Are the conditions in the room constant or do they change?
● Are smoke, dust, steam, flames, vibrations, or heat produced in the room?
4.18 High, open halls and rooms
The following are examples of high, open halls and rooms:
● Atrium
● Auditorium
● Aircraft hangar
● Exhibition hall
● Warehouse
Air layers can form in these rooms. These air layers act as a barrier to the free
exchange of air and can prevent smoke from reaching the ceiling.
In such cases, pipes with aspirating holes can be routed downward on frames or
walls.
4.19 Cavities in ceilings and floors
Cavities in ceilings and floors may be a suitable method of removing air for certain
applications. These cavities can be integrated into the pipe system, ensuring they
will be reliably monitored.
This is beneficial for cable ducts in computer rooms, for example.
Planning
Ambient conditions
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