Britannia 70CM, User Instructions

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 gives the best extraction 
performance.  

Warning: Any ducting used must be fire retardant.  

Encatchment area 
 

Your canopy hood will perform better if there is a recess/encatchment area built into the 
underside of your canopy furniture housing. This recess acts as a place for the fumes and 
vapours to collect before the motor extracts these away.  

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. 

Non-return flaps

On certain models only, there is a metal-hinged non-return flap in the outlet spigot of the hood 
where the ducting attaches.The purpose of this flap is to prevent wind/weather from blowing back 
through the ducting and hood and back into the kitchen. However, some ducting incorporates 
integral non-return flaps, often in the form of hinged flap/s where the ducting terminates at the 
outside wall vent.You do not need two non-return flaps in the system, so if this is the case remove 
the non-return flap sited in the hood outlet spigot - it simply lifts out. 

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