American Aldes CER-LP-S-IIR Low-Pressure Retrofit Constant Exhaust Registers incorporate a modulating orifice that automatically regulates airflows in duct systems to constant levels. The passive control element responds to duct pressure and requires no electric or pneumatic sensors or controls. The CER-LP-S-IIR compensates for changes in duct pressure caused by thermal stack effect, building pressure, dust-clogged filters, etc. The CER-LP-S-IIR also eliminates the need for on-site balancing.

The active control element is a unique aerofoil. The aero-wing damper lifts in response to increasing static pressure. This operation regulates the free-area opening through the control, resulting in maintenance of velocity and specific airflow set points.

Pressure Range: 0.1 to 0.42 in. w.g. (25-100 Pa)
Use: Exhaust or Return Air
Application: Retrofit
Duct Type: Square/Rectangular
Assembly Includes: CAR-II-LP, Aluminum Exhaust Air Grille, and Retrofit Gasket

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