Commercial Products  >  Draft Control
EBC 35
Modulating Pressure Control and CO Monitor

The EBC 35 is a multi-use draft or pressure controller and CO-monitor with integrated webserver and remote access used with fans and dampers to monitor and maintain a constant draft or pressure by varying the speed of a fan(s) or the position of an actuator. Typical uses are:

  • Maintain a constant draft by modulating a power venter in a mechanical draft system serving boilers and water heaters,
  • Maintain a constant draft by modulating position of an over-draft damper serving boilers and water heaters,
  • Maintain a constant duct pressure in a dryer venting system or a ventilation system
  • Control the supply of combustion air to a mechanical room or directly to a boiler(s)
  • Control and maintain room pressure


  • Controls 3 air plenums (exhaust fan, damper and supply fan) via individual PID loops.
  • External bus for hardware upgrades
  • “Plug-n-Play” monitor all terminals and registers components attached
  • 0-10V signal for Edrive or actuator control
  • LCD Graphical Display and 512kB processor
  • Integrated webserver for remote monitoring, configuration and firmware upgrade
  • USB interface
  • Interlock with up to 6 heating appliances
  • Integrated safety system
  • Priority operation function
  • Intermittent or continuous operation
  • Two RS485 ports for Modbus and BACnet communication
  • Bearing cycle activation


Power Supply 1 x 120VAC
Amperage 6.3A
Control Mode Continuous or Intermittent
Control Signals 0-10 VAC (for VFD) and 120/240 VAC (for direct connect)
Range Of Operation 0-0.6 inWC / 0-150 Pa
Tolerance 0.01 inW (3 Pa) +/- 10%
Output 10-120VAC / 0-10VDC
Control Relays (6) Max 120VAC/8A
EMC Standard Emission: EN50 081-1, Immunity: EN50 081-2
Warranty 2 Years
Listing Certification UL 378, Standard for Draft Equipment when used with RSV, TDF, BPV
UL 60947, Standard for Industrial Control Panels
CSA C22.2 No. 14-95, Standard for Industrial Control Equipment