The staged heater control panels include an interlock with a supply fan to ensure the supply fan is running and airflow is proven. The panel comes complete with a duct sensor and airflow pressure switch. 7 day time clock can be added to the design if required with Hand Off Auto control to override the time clock.
You can add BMS contacts for enabling the system and to pick up either a common fault of individual faults.
You can have the fans speed controlled either manually or by pressure or temperature. Add and inverter, transformer or electronic fan speed control.
You can add a simple enable panel with faulty indication or go fully touch screen. There is a solution to fit your budget.