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45
Rangehoods Installation
Recirculated to kitchen area via bulkhead Recirculated to kitchen area via ceiling cavity
Ducted to atmosphere through wall Ducted to atmosphere through roof
Rangehood Installation
Exercise care when a rangehood is installed in an area where
a gas burner is operating. Depending on the size of the room,
the rangehood may draw from the room air that is necessary
for proper combustion of the burner.
All Blanco rangehoods are used for indoor application only.
Rangehoods may be ducted in two ways:
1. Ducted to the atmosphere (outside).
2. Recirculating.
We recommend ducting to the atmosphere to ensure optimum
performance. Recirculating the air back into the room should only
be used when outside extraction is not possible.
To ensure maximum performance when ducting it is important
the ducting that carries the fumes away, be as short and as straight
as possible.
When incorporating a rangehood in the design of a kitchen the
following points need to be considered to achieve the most
benefit from the rangehood.
1. Ducting from a rangehood carrying the exhaust air, should not
exceed a length of three (3) metres.
2. For ducted installation we recommend using galvanised or
similar metal type flue pipe. PVC pipe is not recommended.
3. Ducting containing a 90° degree bend will encounter a loss in
efficiency of approximately 35%. Additional 90° degree bends
can cause losses of up to 15% per bend.
4. Ducting size should always comply with the manufacturers
specification.
5. We recommend carbon filters be used when recirculating the air
into the room. There will be some loss of air movement when
carbon filters are fitted.
Overhead Clearances
Any combustible construction, rangehood or exhaust fan shall be installed in accordance with the manufacturers instructions. However, in no
case shall the clearance between the highest part of the HOB of the cooking appliance (including trivets for gas cookers) and a rangehood be
less than 600mm or, for an overhead exhaust fan, 750mm.
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