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What is a CAR-II ?



Car-II American Aldes installed by FixDuct




The CAR-II – 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 electric or pneumatic sensors or controls.
The CAR-II compensates for changes in duct pressure caused by
thermal stack effect, building pressure, dust clogging of filters,

etc. The CAR-II also provides a low cost solution to balancing
forced air systems for heating, air conditioning and ventilation,
eliminating the need for on-site balancing. The CAR-II will regulate
airflow in supply, return or exhaust duct systems.