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  • CER3-S
The Aldes CER3-S 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-S requires no electric or pneumatic power or sensors, and works solely off system pressure.

The CER3-S compensates for changes in duct pressure caused by stack effect, operable windows and doors, wind, loading filters, etc. The CER3-S 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 Duct Width (in)

Nominal Duct Height (in)

Item #

Airflow Range

Nominal Duct Width

Nominal Duct Height

N/A 35 to 180 cfm N/A 10 in N/A 8 in
N/A 35 to 180 cfm N/A 10 in N/A 10 in
N/A 35 to 180 cfm N/A 10 in N/A 12 in
N/A 35 to 180 cfm N/A 12 in N/A 6 in
N/A 35 to 180 cfm N/A 12 in N/A 8 in
N/A 35 to 180 cfm N/A 12 in N/A 10 in
N/A 35 to 180 cfm N/A 12 in N/A 12 in
N/A 45 to 260 cfm N/A 8 in N/A 8 in
N/A 45 to 260 cfm N/A 8 in N/A 10 in
N/A 45 to 260 cfm N/A 8 in N/A 12 in
N/A 45 to 260 cfm N/A 10 in N/A 8 in
N/A 45 to 260 cfm N/A 10 in N/A 10 in
N/A 45 to 260 cfm N/A 10 in N/A 12 in
N/A 45 to 260 cfm N/A 12 in N/A 8 in
N/A 45 to 260 cfm N/A 12 in N/A 10 in
N/A 45 to 260 cfm N/A 12 in N/A 12 in
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