Skip to navigation
990HOBD or 990VOBD and AL990HOBD or AL990VOBD — Double Deflection Supply with Opposed-Blade Damper, Steel or Aluminum

How to Specify

Provide the following information:

  • Model Number
  • Width
  • Height
  • Finish

990HOBD or 990VOBD and AL990HOBD or AL990VOBD — Double Deflection Supply with Opposed-Blade Damper, Steel or Aluminum

  • These models provide maximum four-way diffusion. 
  • The OBD provides complete air control in both planes and equal air distribution over entire register face.
  • Front and rear blades are set on 3/4" centers with adjustment of each easily accomplished through face.
  • OBD is screwdriver-operated. Minimum OBD depth allows use in shallow stackheads.
  • Steel or Aluminum. Bright White finish standard. Countersunk mounting holes.

H means horizontal blades; V means vertical blades