12 Particular attention should be paid to the
exhaust and supply systems in toilet and washing areas. Ventilation
systems to all compartments of a ship should be designed, installed
and balanced to ensure satisfactory distribution of air. They should
be maintained in a clean and efficient condition to achieve the designed
air changes throughout the service life of the vessel. In general,
attention should be paid to the following:
-
.1 Examination of extraction grills, louvres,
ducts, etc., in order to ensure that they are clear and free of accumulations
of dirt, fluff, etc.
-
.2 Checking the adjustment of extraction louvres
or cones to ensure an even extraction rate from all spaces. However,
when satisfactorily adjusted, there should be no interference with
these units as the adjustment of one unit can seriously affect the
rate of extraction through other units. The design of these fittings
should be such that they are not capable of manual adjustment without
the use of special tools or equipment. Ensure that extraction units
are never blocked off for any reason.
-
.3 Ensuring that air extraction from alleyways
is operating efficiently and that essential air-gaps under cabin doors,
etc., have not been blocked off.
-
.4 Ensuring that the forced ventilation of cabin
spaces is operating efficiently.
-
.5 Inspecting the associated elements of ventilating
systems, including:
-
.5.1 Fans: Checking the direction of rotation,
condition of impellers, etc.
-
.5.2 Flaps and dampers: Ensuring that they have
not become detached from the operating mechanisms and that they are
actually open when indicating open.
-
.5.3 Goosenecks and vents: Ensuring that they
are clear of any obstructions, that grilles or meshes are not painted
over, etc.
-
.5.4 Piping or ducting: Ensuring that these are
intact and free from leaks throughout their length, especially where
they pass through accommodation areas.