Installation
Height above hotplates
For best performance we suggest that the hood is installed at a distance between 65cm to75cm from
the hotplate surface. Under no circumstances should the hood be installed lower than 65cm above the
hotplate surface.
Ducting out/filtering
The hood can be used as a filtering version or as a ducted version. It is always preferable to install the
hood as a ducted version i.e. duct to an outside wall. If this is not practical, charcoal filters can be fitted.
In the filtering mode the air drawn in is purified as it passes through the charcoal filters, the air is then
recycled back into the kitchen. It is realistic to assume that using a hood in filtering mode will circulate
30% less air than by ducting out. Charcoal filters are an optional extra and will require replacing after
120 hours of use or at least every 6 months. Charcoal filters are not required if you duct out. If the
hood is used as a filtering version, please note that the filters will help reduce cooking odours but will
not reduce steam or condensation. If you wish to reduce steam, condensation and cooking odours then
you must duct out.
We strongly recommend that the hood is only used as a filtering version if it is impossible to duct out.
Ducting information
To obtain the best possible extraction performance use 150mm diameter ducting.Wherever possible
utilise rigid circular pipe or “Mega duct” ducting - both types are available via your Britannia dealer. Do
not use expanding concertina type ducting as this is not smooth on the interior and can cause air flow
restrictions. Do not use ducting that has a smaller diameter than 150mm as this will reduce extraction
rates and can increase noise levels. Please note ducting kits and ducting components are optional
accessories and have to be ordered - they are not supplied with the hood.
Maximum length of ducting run
4 metres with 1 x 90 degree bend
3 metres with 2 x 90 degree bends
2 metres with 3 x 90 degree bends
Note: the shorter the ducting run and the least number of bends give the best extraction performance.
Warning: Any ducting used must be fire retardant.
Unpacking the hood
On some models components are packed inside the polystyrene protection pieces.
Do not throw away the box and packaging until installation is fully completed.
3
90 degree bend
Code DUCT/690
Pipe connector
Code DUCT/693
One metre
ducting kit
Comprising: one
metre length pipe,
wall vent and 90
degree bend.
Code DUCT/2609
One metre
length pipe
Code DUCT/1100-6
Two metre
length pipe
Code DUCT/1200-6
One metre and two
metre length pipes can be
cut to the desired length
Wall vent with
gravity flaps
Code DUCT/6900
Combination of 6” (150mm) circular
pipe and flat channel (220mm x 90mm)
which is ideal for running on top of
wall units or between ceiling joists.
Megaduct kit
Code DUCT/2652B
Horizontal bend
Code DUCT/950
Megaduct Ducting Kit
horizontal
bend
350
1000
1000
1000