MOVEMENT REQUIREMENTS FOR BUILDINGS
effectiveness of the MBR Ventridge is not dependent on wind
power, however wind will further increase the extraction rate.
The most suitable ventridge is dependent on the number of
air changes required per hour and the size of the building.
calculate the suitable ventridge size the usage of the building
should firstly be determined and then the relevant number
of air changes specified (see table 1). For example a building
that is being used as a boiler room will require approximately
25-40 air changes per hour compared to 4-8 air changes per
hour for a warehouse. It is then appropriate to calculate
the ventilation rate.
enable natural ventilators to function at their rated capacity,
fresh air inlets should be provided as close to the floor
level as possible.
MBR manufacture a full range of fresh air inlet louvres for
this purpose. MBR require that the total free area of inlet
represents 1.5 times the throat area of the ventilator and
that it be so positioned so as to ensure uniform distribution.