Fisher & Paykel CPV2 Serie Guide D'installation page 10

A suitable ventilation hood must be installed above the cooktop. The following chart indicates the minimum blower capacity recommended for hood ventilation.
VENTILATION STANDARD WALL INSTALLATION
UNIT RECOMMENDATONS
HOOD 23" (548 mm) Deep x
Unit Width
BLOWER 48" Cooktop
1200 CFM
36" Cooktop
600-1200 CFM
30" Cooktop
600 CFM
Important notes
Ventilation hoods and blowers are designed for use with single wall ducting. However, some local building codes or inspectors may require double wall ducting and/or a damper.
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Consult local building codes and/or local agencies, before starting, to ensure that hood and duct installation will meet local requirements.
Semi-rigid ducting is recommended for maximum effectiveness.
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Hood blower speeds should be variable to reduce noise and loss of heated or air conditioned household air when maximum ventilation is not required.
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Normally, the maximum blower speed is only required when using the grill.
For best smoke elimination, the lower edge of the hood should be installed a minimum of 30" (762mm) to a maximum of 36" (914mm) above the cooking surface.
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If the hood contains any combustible materials (eg a wood covering) it must be a minimum of 36" (914mm) above the cooking surface.
Due to a high volume of ventilation air, a source of make-up air (outside replacement air) is recommended. This is particularly important for tightly sealed and insulated homes.
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A reputable heating and ventilating contractor should be consulted.
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VENTILATION REQUIREMENTS
ISLAND INSTALLATION
RECOMMENDATONS
30" (762mm) Deep x
(Unit Width + 4" (102mm))
48" Cooktop
1200 CFM
HOOD (NON-COMBUSTIBLE)
36" Cooktop
600-1200 CFM
30" Cooktop
600 CFM
23" (584mm)
HOOD (inc. COMBUSTIBLE)
(for example a
23" (584mm)
wood surround)
min. 36" (914mm)
min. 30" (762mm) -
max. 36" (914mm)
Wall Installation
30" (762mm)
HOOD (inc. COMBUSTIBLE)
(for example a
wood surround)
30" (762mm)
HOOD (NON-COMBUSTIBLE)
min. 36" (914mm)
min. 30" (762mm) -
max. 36" (914mm)
Island Installation