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  1. Siemens DDC 540-865EN TEC Variable Air Volume W/0-10V AO Heat Modulation & Co2
    -10%
    Siemens DDC 540-865EN TEC Variable Air Volume W/0-10V AO Heat Modulation & Co2
    Special Price $1,004.04 Regular Price $1,114.49
  2. Siemens DDC 540-100 Terminal Box Controller
    -10%
    Siemens DDC 540-100 Terminal Box Controller
    Special Price $860.40 Regular Price $955.05
  3. Siemens DDC R550-065 Refurbished Terminal Equipment Control & Actuators
    -10%
    Siemens DDC R550-065 Refurbished Terminal Equipment Control & Actuators
    Special Price $510.08 Regular Price $566.19
  4. Siemens DDC PXC100-PE96.A PXC Modular Controller
    -1%
    Siemens DDC PXC100-PE96.A PXC Modular Controller
    Special Price $99.00 Regular Price $100.00
  5. Siemens DDC 540-378 Autozero Module
    -13%
    Siemens DDC 540-378 Autozero Module
    Special Price $126.78 Regular Price $145.80
  6. Siemens DDC PTM6.1PSI20-M-NEW Positioning Module
    -10%
    Siemens DDC PTM6.1PSI20-M-NEW Positioning Module
    Special Price $716.76 Regular Price $795.61
  7. Siemens DDC 540-517R Dual Duct Control
    -10%
    Siemens DDC 540-517R Dual Duct Control
    Special Price $573.12 Regular Price $636.17
  8. Siemens DDC R540-103 Refurbished Constant Volume Control
    -10%
    Siemens DDC R540-103 Refurbished Constant Volume Control
    Special Price $398.81 Regular Price $442.67
  9. Siemens DDC R540-110 Refurbished Unit Condenser Control W/TEC
    -10%
    Siemens DDC R540-110 Refurbished Unit Condenser Control W/TEC
    Special Price $463.57 Regular Price $514.56
  10. Siemens DDC R540-100 Refurbished Terminal Box Control
    -10%
    Siemens DDC R540-100 Refurbished Terminal Box Control
    Special Price $463.57 Regular Price $514.56
  11. Siemens DDC 540-100N 1/8HP VAV Terminal Box Controller 24V Load Circuit
    -10%
    Siemens DDC 540-100N 1/8HP VAV Terminal Box Controller 24V Load Circuit
    Special Price $860.40 Regular Price $955.05
  12. Siemens DDC 550-430 BACnet VAV Actuator (GDE)
    -10%
    Siemens DDC 550-430 BACnet VAV Actuator (GDE)
    Special Price $659.31 Regular Price $731.83
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Siemens DDC Parts