Y1
1st Year Apprentice
0 XP total • 500 to next
0 solved
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VFD Speed Range for Fan Application
Building Controls
Journeyman+75 XP
Scenario
A supply fan VFD must modulate from design airflow (10,000 CFM) down to minimum airflow (3,000 CFM) for a VAV system. Using the fan affinity laws (flow is proportional to speed), what minimum VFD speed percentage is required?