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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. Consult local
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building codes and/or agencies, before installing to ensure local requirements are met. Semi-rigid ducting is recommended for maximum effectiveness.
Hood blower speeds should be variable to reduce noise and loss of household air.
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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. A reputable
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heating and ventilating contractor should be consulted.
WALL INSTALLATION
Non-combustible
C
A
VENTILATION UNIT
A
Hood
B
C
30" Cooktop
min. 550 CFM
Blower
36" Cooktop
min. 550 CFM
VENTILATION REQUIREMENTS
Combustible
C
B
WALL INSTALLATION RECOMMENDATIONS
min. 30" (762mm)
max. 42 (762mm)
min. 36" (914mm)
max. 42 (762mm)
min. 19" (480mm)
ISLAND INSTALLATION
Non-combustible
C
A
VENTILATION UNIT
A
Hood
B
C
30" Cooktop
min. 550 CFM
Blower
36" Cooktop
min. 550 CFM
Combustible
C
B
ISLAND INSTALLATION RECOMMENDATIONS
min. 30" (762mm)
max. 42 (762mm)
min. 36" (914mm)
max. 42 (762mm)
min. 19" (480mm)
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