ALDES Zone Register Terminals (ZRT®) are designed to introduce flexibility and dynamic control of central ventilation systems. Used in both large and small systems, the ZRT-SDIL-1 zonally regulates ventilation without the need for individual fans. Each ZRT-SDIL-1 is a combination register box, control damper, removable access plate, and optional flow regulator(s). This unique combination provides up to three different control schemes without the need for expensive pneumatic, electronic, or DDC control systems.
The ZRT-SDIL-1 model provides on-off control for on-demand ventilation. This allows central fan downsizing and promotes energy savings by minimizing necessary fan horsepower and ventilation-induced heating and cooling loads on the building. The Constant Airflow Regulator (CAR) installed in the ZRT-SDIL-1’s extended duct collar places a maximum flow limit on each terminal. The automatic operation of the CAR will prevent noise and excessive energy consumption caused by over-ventilation, as well as fluctuations in airflow rates as total system pressure varies.
The ZRT-SDIL-1 can activate fans used in smaller central exhaust or supply ventilation systems. Through the use of an integral damper end-switch, the ZRT-SDIL-1 can trigger the remote fan to start. This provides the distinct advantage of allowing the fan to only ventilate specific spaces without the need for separate fans in each space. This capability is especially important in residential bath exhaust applications with in-line and multi-port fans, where low noise and a single exterior vent penetration are desired.