DUCTING AND EXTRACTION LEVELS
WHISPAIR ducting is designed to ensure optimum performance for your rangehood. Please follow the installation instructions
carefully.
Every WHISPAIR rangehood must be ducted to the
Inline
or
Externally
mounted KLEENAIR fan motor unit by the use of
non-flammable ducting. The rangehood must not be ducted into a wall cavity or a ceiling space where a build-up of grease can
occur and become a potential fire risk. Ensure the external outlet on the KLEENAIR unit is not covered and the air flow is not
restricted in any way as this may result in reduced performance.
The duct must at all times have a cross sectional surface area equivalent to the hood outlet. The hood outlet has a circular cross
section of 200mm in diameter or an approximate area of 31,400mm2. Do not reduce the duct size at any time and avoid sharp
bends. If the duct run is longer than six (6) metres, it may be necessary to enlarge the duct size to ensure optimum performance.
The manufacturer does not guarantee performance when the duct length is greater than six (6) metres.
Ensure that all ducting is correctly fitted and sealed with pipe clips, duct tape or silicone to ensure that fumes do not escape prior
to reaching the KLEENAIR fan motor unit.
The WHISPAIR extraction calculations are based upon a 50pa change of head of pressure loss and are used to factor the variance
of air flow resistance through the ducting. 50pa is equivalent to approximately four (4) metres (the recommended length) of flexi
ducting with one gentle bend, which is above and beyond the industry standard of one straight metre of ducting. The KLEENAIR
LITE offers a powerful 800 cubic metres per hour (223 litres per second) of air movement. The KLEENAIR PRO offers 1140 cubic
metres per hour (317 litres per second) whilst for serious users the KLEENAIR PRO PLUS boasts a market leading 2010 cubic
metres per hour (558 litres per second).
6
THE RECOMMENDED DUCT
LENGTH (INSTALLATION DISTANCE)
IS 4 METRES.
THE MINIMUM INSTALLATION
DISTANCE IS 3 METRES.
GENTLE BENDS IN THE DUCTING
ARE RECOMMENDED AS IT ASSISTS
IN MUFFLING NOISE FROM THE
REMOTE FAN UNIT.
To Rangehood Unit
Gentle Bend
In Ducting
