13
Ducting and ventilation
For best performance and lowest noise output, we recommend the
use of 150mm ducting. You can also use smaller diameter ducting but
this will reduce performance and potentially increase the noise level
of the extractor whilst in use. In general, the less ducting you use (i.e.
distance and bends) the more efficient your extractor will be.
You may wish, at this stage, to fit the chimney piece fixing bracket
(Fig. 5). If a flush-fit to the ceiling is desired, then this bracket should
be fitted as close to the ceiling as possible (whilst bearing in mind
the maximum height of the extractor as per Fig. 3 and the minimum
installation heights as per page 11). Use fixings (e.g. wall plugs) suitable
for the surface to which the extractor is to be mounted.
Before cutting/drilling through any surfaces, ensure that adequate
measures have been taken to ensure no electrical cables or similar
lie behind.
Fig. 5