3-14
Airflow Draw Test
1. Turn off the hood exhaust fan.
2. Measure the unit’s airflow lift with only its fan running.
(For information about measuring the airflow lift, see
page 3-19.)
3. Turn on the hood exhaust fan.
4. Measure the unit’s airflow lift with both its fan and the
hood exhaust fan running.
If the airflow lift value does not change, the position
of the unit’s exhaust vent is appropriate.
If the value increases, move the unit’s exhaust pipe
away from the hood exhaust duct and go back to
step 1.
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