The new dual adjustable* model CAR3-S Constant Airflow Regulator is a modulating orifice that automatically regulates airflows in duct systems to constant levels. The passive control element responds to duct pressure and requires no sensors or controls.
The CAR3-S compensates for changes in duct pressure caused by: use of demand control solutions, thermal stack effect and dust-clogged filters as an example. The CAR3-S provides a low-cost solution to balancing forced-air systems for ventilation, heating, and air conditioning, eliminating the need for on-site balancing. The CAR3-S will regulate airflow in supply, return, or exhaust duct systems.
Each CAR3-S mounting plate is designed specifically to install the CAR3-S in square or rectangular duct and features Aldes exclusive twistlock feature to secure CAR3-S without use of gasket or adhesive.
The active control element of the CAR3-S is a engineered damper assembly which is calibrated to respond to changes in pressure with no input from an external power source or signal. The CAR3 is UL 2043 safety classified and labeled for flame and smoke generation.
The CAR3-S airflow regulators control airflow accurately to within 10% of rated flow throughout the target operating pressure ranges; 0.12 to 1.2 in. w.g. (30 to 300 Pa) for low pressure models (CAR3-L), and 0.4 to 2.8 in. w.g. (100 to 650 Pa) for high pressure models (CAR3-H). Airflow set point is selected by turning the adjustment dial on either side (supply or exhaust) of the CAR3. The indicator shows the selected CFM. Each diameter of CAR3-S has a unique airflow range for both low- and high-pressure variants, and the setpoint is infinitely adjustable across those ranges.
Pressure Ranges: Low: 0.12 to 1.2 in. w.g. or High: 0.4 to 2.8 in. w.g.
Use: Exhaust or Supply Air
Application: New Construction or Retrofit
Warranty: 7 years
Duct Type: Square/Rectangular
Assembly Includes: Removable CAR3 and Duct Adapter Plate