COMBINATION ZONE RELIEF DAMPERS (CZRD)
The Combination Zone Relief Damper is a patented product that eliminates the need to install a bypass duct and damper in a zone control system. This is accomplished with a built-in static pressure relief mechanism that will modulate open once the static pressure within the duct has reached an unacceptable level. (Factory set at 0.3”WC)

The CZRD is the answer to many installation problems such as:
CZRD Round
  • Two-position 24V 1.2 VA 3-wire power open, power close actuator
  • Constructed of galvanized smooth steel
  • Double beaded for rigidity
  • Offered in round diameters of 5”, 6”, 7”, 8”, 9”, 10”, 12”, 14”, 16”, 18”
  • Nylon bushings for quiet, long lasting operation
  • Compatible with residential or light commercial applications with static pressure less than 1.0” WC

CZRD Rectangular Side Mount
  • Two-position 24V 1.2 VA 3-wire power open, power close actuator
  • Constructed of durable extruded aluminum frame with a one piece galvanized steel blade
  • Available in all standard sizes starting at 8”x 8” and increasing in two inch increments with custom sizes available
  • When ordering a side mount rectangular damper: A” x B” dimensions will be Width (always the larger dimension) x Height (always the smaller dimension) and the actuator and mounting plate will always be mounted on the B dimension
  • Nylon bushings for quiet, long lasting operation
  • Compatible with residential or light commercial applications with static pressure less than 1.0” WC

CZRD Rectangular Bottom Mount
  • Two-position 24V 1.5 VA 3-wire power open, power close actuator
  • The Bottom Mount CZRD uses a low-profile, slimline actuator for mounting inside the duct
  • Constructed of durable extruded aluminum frame with a one piece galvanized steel blade
  • Available in all standard sizes starting at 8”x 8” and increasing in two inch increments with custom sizes available
  • When ordering a bottom mount CZRD rectangular damper: A” x B” dimensions will be the Width x Height and the mounting plate will always be mounted on the A dimension while the actuator will be inside the damper
  • Nylon bushings for quiet, long lasting operation
  • Compatible with residential or light commercial applications with static pressure less than 1.0” WC

CZRD Installation Video
Download Fahrenheit Series Brochure
Download Fahrenheit Series Catalog