Video demonstration - what to do when your flow is to low.

Retrotec 3300 series variable-frequency fans require 100-280 VAC 50/60 Hz power in order to operate reliably. Voltage drops due to line losses and fluctuations in AC power can be significant. The fans will not work at line voltages of less than 95 VAC. If the system will:

Whether you are using a soft or hard panel frame for your blower door, it’s easy to set up. If you don’t have one already, each frame has its own benefits – Find out which is right for you and how to set it up.

This question can be asked in many ways: Is my gauge reading right? Is my fan calibration accurate? How can I tell if my readings are correct?