Aldes Constant Airflow Regulator (CAR) - 4" - 45 CFM
The Classic - Constant Airflow Regulator (CAR) 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 compensates for changes in duct pressure caused by thermal stack effect, building pressure, dust clogging of filters, etc. The CAR 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 will regulate airflow in supply, return or exhaust duct systems.
The Classic CAR is a perfect solution for:
- Balancing airflow in multiport bathroom ventilation systems
- Balancing airflow in whole home ventilation systems
- Regulation of make up air
- Balancing supply and exhaust of heat recovery / energy recovery ventilation systems
- Balancing HVAC supply and exhaust air in homes and businesses
The active control element of the CAR is a flexible bulb, which inflates and deflates in response to the static pressure difference across the control. This operation regulates the free-area opening through the control, resulting in maintenance of velocity and specific airflow set points.
Each CAR is designed and produced for control of air in temperatures ranging from -25° to 140° F (-32° to 60° C.)
The CAR regulating element is housed in a heavy gauge rolled galvanized steel sleeve. Each sleeve is seam welded to prevent leakage. The assembly is sized to fit inside standard rigid round ducting, as well as fittings such as take-offs, tees, etc. A brush or flex-type ring seal gasket around the circumference ensures a tight, no-leak fit. Spring action metal clips on the housing grip the interior of the duct or fitting to secure the control firmly in place with minimal installation effort.