2000 Series Fans : Range Configurations for Retrotec 2000 and 3000 Series Fans
Retrotec blowers doors offer more calibrated flow ranges than any other manufacturers blower door systems. Ranges allow you to fine tune your blower door's performance to suit the room or building that you're testing. More calibrated ranges means more accurate, reliable results.
The diagrams below show the various ranges for Retrotec's 2000 and 3000 series fans and how to setup the fan for them. If you have any questions about your equipment, please don't hesitate to contact our technical support team at 604.732.0142 or support@retrotec.com
 | Open Range has no covers over fan inlet |
 | Range A has 1 ring installed |
 | Range B has 2 rings installed |
 | Range C8 has 2 rings installed + 8 hole plate |
 | Range C6 has 2 rings installed + 8 hole plate with 2 plugs |
 | Range C4 has 2 rings installed + 8 hole plate with 4 plugs |
 | Range C2 has 2 rings installed + 8 hole plate with 6 plugs |
 | Range C1 has 2 rings installed + 8 hole plate with 7 plugs |
As a general guideline, if you aren't measuring enough flow from the fan you should reduce the size of the opening on the inlet of your fan: change to a smaller range. If you are having trouble achieving the target pressure, or the fan is running at well over 50% of its maximum speed you should increase the size of the opening on the inlet of your fan by changing to a larger range.
