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  • CSR3-R
The Aldes CSR3-R Constant Supply Register incorporates a pressure independent balancing damper that automatically regulates airflow in duct systems to constant levels. The passive control element in the CSR3-R requires no electric or pneumatic power or sensors, and works solely off system pressure.

The CSR3-R compensates for changes in duct pressure caused by stack effect, operable windows and doors, wind, loading filters, etc. The CSR3-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 15 to 85 cfm N/A 4 in
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