The VCS3 opposed blade damper provides airflow adjustment at the grille. Volume control blades move simultaneously in opposite directions to provide superior metering and control with minimal disturbance of the air pattern.

Factory Direct Registers, Grilles, Diffusers, Louvers and Dampers for Your Home, Office or Commercial Application.

Polyaire Model OBD Opposed Blade Dampers are commonly used as a volume control device in supply, return and exhaust air systems. The Polyaire range of Linear Bar Grilles are normally used where an architectural blend of the grille to its surroundings are required.

METALAIRE is the flagship brand of Metal Industries Inc., offering a complete line of air distribution and air terminal products. From standard grilles and registers, to its architectural line of Formations® linear slot diffusers, along with a newly released series of displacement diffusers, METALAIRE has the air devices to meet every need.

Model OBD is used on registers and grilles. OBDDM is used for duct mounting. Opposed-blade dampers have vertical blades that move in opposite directions to control air volume over the entire face of a register or grille. Interwoven tension spring on blade pivot points permits positive setting from full-open to full-closed.

A618MS/A618OB — Aluminum Straight Blade, Vertical Fin Register, MS or OBD damper

Model XG-OBD is a steel opposed blade damper with tapered blades set in a U-channel frame.

The OBD is a steel opposed blade damper operated by a flat-head screwdriver. This damper attaches directly to most grilles and registers with ‘S’ clips and is useful for air balancing. Opposed Blade Damper for Grilles

Hart & Cooley is an industry leader in the HVAC supply industry, providing unmatched customer care and high-quality commercial and residential grilles, registers, diffusers, vent systems, and chimney systems for more than a century.

USAIRE, a brand of Metal Industries Inc., offers a full line of registers, grilles and diffusers for the residential and light commercial HVAC markets. Prior to and after the sale, USAIRE sales and customer service is dedicated to providing the highest level of quality, value and service.