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  • CER3-R
The Aldes CER3-R Constant Exhaust Register incorporates a pressure independent balancing damper that automatically regulates airflow in duct systems to constant levels. The passive control element in the CER3-R requires no electric or pneumatic power or sensors, and works solely off system pressure.

The CER3-R compensates for changes in duct pressure caused by stack effect, operable windows and doors, wind, loading filters, etc. The CER3-R provides a low-cost solution to maintaining the correct airflow balance of ventilation systems, improving system performance and indoor air quality, which can provide significant savings on annual operating costs.
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Airflow Range (cfm)

Nominal Grille Width (in)

Nominal Grille Height (in)

Round Duct Size (in)

Item #

Airflow Range

Round Duct Size

N/A 35 to 180 cfm N/A 6 in
N/A 35 to 180 cfm N/A 6 in
N/A 35 to 180 cfm N/A 6 in
N/A 35 to 180 cfm N/A 6 in
N/A 35 to 180 cfm N/A 6 in
N/A 45 to 260 cfm N/A 6 in
N/A 45 to 260 cfm N/A 6 in
N/A 45 to 260 cfm N/A 6 in
N/A 45 to 260 cfm N/A 6 in
N/A 45 to 260 cfm N/A 6 in
N/A 45 to 260 cfm N/A 6 in
N/A 45 to 260 cfm N/A 6 in
N/A 45 to 260 cfm N/A 6 in
N/A 45 to 260 cfm N/A 6 in
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