ecMModulator 4Z Package

ECM 4Z sensor and tube Web

The ECMModulator 4Z contains all the features of the ECMModulator 4. In addition, it very accurately controls duct pressures in zoned HVAC systems. This control eliminates the need for a crossover duct and pesky bypass dampers, greatly improving the efficiancy of your zone system!

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4Z kit web

Kit includes

  • The ECM 4Z Control
  • Top of the line 1/2 hp EMC motor
    (1/3 hp , 3/4 hp, and 1 hp also available)
  • Tempreature Sensor
  • Pressure tubing
  • Pressure plate
  • 120/240 volt cable
  • Control Cable
  • Instruction booklet (not pictured)
  • FanHandler 5 Year Warranty and 60 day money back guarantee.

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  • Hi Ryan,

    Controller arrived on Friday and was installed on Saturday. Works great. I actually have used it operating in a differential  pressure mode with a flow probe prior to the filter on the return and a flow probe about 2/3 of the way down the main duct (as I was taught for VAV systems).

    I’m very pleased with how this works and it has solved the control problem I was dealing with. The Bosch airhandler in the installation is capable of two speeds, but of course the ECM 4Z doesn’t care about those. One possible improvement for your controller is to allow for a different HI set point for Stage 1 and Stage 2 call. Stage 2 could be at a higher TESP, which would be a bit noisier, but generally wouldn’t be used. As is stands the ramping up of the fan is gentle and not very noticeable unless you listen for it. Much better than before.