4"

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  SKU: HD-XX

  Round Heavy Duty Dampers
• 

  SKU: CO2-MOD-XX

  Modulating Demand CO2 Ventilation Kit
• 

  SKU: EB-XX

  Electronic Bypass Dampers
• 

  SKU: CO2-2POS-XX

  Two Position Demand CO2 Ventilation Kit
• 

  SKU: D-Z1-XX

  One Two-Position Round Dampers
• 

  SKU: LD-XX

  iO HVAC Controls LD Series Round Dampers with 3 Wire Actuator and LED
• 

  SKU: RM-XX

  Round Dampers
• 

  SKU: ZD-XX

  Modulating Commercial Zone Damper, Round
• 

  SKU: D-XX-120V-PO

  D-Series Two-Position Round PO Dampers with 120V Actuator
• 

  SKU: MZR-XXXX-X-PC

  Motorized Power Close Zone Registers
• 

  SKU: SD-XX

  Auxiliary Round Zone Damper
• 

  SKU: BAL-XX

  Electronic Remote Balancing Damper with Actuator