Use and Care Manual

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Fan Curve Diagrams
Airfl ow Control Technology (ACT)
Some local codes limit the maximum amount of CFM a range hood can move. ACT allows you to
control the maximum blower CFM of hoods with Zephyr’s DCBL Suppression System without the need
for expensive make up air kits. ACT enables the installer to easily set the maximum blower speed to
one of three most commonly specifi ed CFM levels; 590, 440 or 290 CFM. The usage of ACT may not be
necessary for your installation. Please check your local codes for CFM restrictions.
By default the maximum blower CFM is set to 715.
To verify if your installer enabled ACT; With hood off, press and hold the power button for three seconds.
Blower CFM will be displayed on the LCD screen. There should also be a foil label located inside the
hood body near the wiring diagram that indicates the blower CFM.