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Greenheck: Vari-Green HOA Control
The Vari-Green hand/off/auto control (HOA) provides the ability to control fans that accept a 0-10V speed reference. Whether you have an Electronically Commutated (EC) motor or a Variable Frequency Drive (VFD), this device allows local or remote control. A speed reference can be created at the HOA control, or passed to the motor from another source. With only three buttons and an OLED display, versatility and simplicity is key.