TEC Minneapolis Blower Door™ Model 3 Fan with Flow Rings and Fan Speed Controller

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The Model 3 Blower Door Fan moves air to pressurize or depressurize a building during a building envelope test.


  • AC 110 volt, 3/4 horse power motor
  • Flow sensor measures air flow through the fan
  • Lightweight and rugged injection molded fan housing
  • Top handle for transportation
  • Flow rings A and B included, measure air flows down to 300 CFM (Optional rings C, D and E, sold separately, can measure to 11 CFM)
  • The variable fan speed controller helps supply power to the fan and can be used with 110 volt/60 hertz or 220 volt/50 hertz AC power grids
  • Color coded interior LED indicator for operation status or trouble shooting
  • Fan speed control jack used to control fan speed during automated testing or using TEC's digital gauge cruise control function (Fan control cable sold separately)
  • Belt clip on the controller case back to connect to a gauge mounting board