Air sampling test points allow for functional smoke testing of aspirating smoke detection systems and are typically located at the end of a sampling pipe network.
VESDA provides the discreet detection required in heritage buildings by routing the sampling pipes in areas that are not visible from normal occupancy. Small-bore capillary pipes are used to provide detection at the required location. The room fabric often dictates the location of these capillary tubes. Hiding the capillary tubes behind light fittings, blending in with ceiling paintings or forming part of the ceiling sculptures can all be used to provide ‘invisible’ smoke detection.
In high volume, atria applications such as cathedrals, capillary sample points can be routed into the area at intermediate vertical levels to good effect to overcome stratification. The higher potential sensitivity of the VESDA system means that less smoke is required at the sample points to provide an alarm condition.
