Stepped speed controllers — 3, 4 and 5 fixed speeds for single-phase 230V fans

Stepped speed controllers are the simplest and most reliable fan speed control solution — a rotary or push-button switch that selects one of 3, 4 or 5 predefined speeds. No complex electronics, no analogue signal, no programming — wall mounted, wired between supply and fan, works immediately. Preferred when the end user must operate the system without training, when the installer wants a fast installation, or when project budget limits complexity. Fixed speeds are stable and repeatable. Main applications: professional kitchen ventilation, residential bathroom ventilation, small office ventilation, any application requiring 2–4 distinct operating modes without automation.