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

How to Specify

Provide the following information:

Model Number
Width
Height
Finish

Submittal Data — 990H/990V and AL990H/AL990V

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