Fisher and Paykel RDV3-304-N Installation Guide - Page 11

VENTILATION REQUIREMENTS z 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 building codes and/or agencies before installing to ensure local requirements are met. z Hood blower speeds should be variable to reduce noise and loss of household air. The maximum speed should only be required when using the grill. z 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 heating and ventilating contractor should be consulted. Non-combustible ISLAND INSTALLATION Combustible Non-combustible WALL INSTALLATION Combustible C A C B C A C B VENTILATION UNIT Hood Blower 30" Range 36" Range 48" Range ISLAND INSTALLATION RECOMMENDATIONS A min. 30" (762mm) B min. 36" (914mm) C min. 19" (480mm) max. 42 (1067mm) max. 42 (1067mm) min. 550 CFM min. 550 CFM min. 1100 CFM VENTILATION UNIT Hood Blower 30" Range 36" Range 48" Range WALL INSTALLATION RECOMMENDATIONS A min. 30" (762mm) B min. 36" (914mm) C min. 19" (480mm) max. 42 (1067mm) max. 42 (1067mm) min. 550 CFM min. 550 CFM min. 1100 CFM 11