Overview
A cabinet thermostat that starts the fan only when the enclosure warms. Running the fan on demand rather than continuously reduces dust intake, noise and energy use, and it makes the filter last longer.
Set points and contact types vary by model. The contact has to match the switching logic — fan on rising temperature for cooling, heater on falling temperature for heating — and the rating has to cover the fan current.
Where it fits
- Control and distribution cabinets
- Fan and filter combinations
- Anti-condensation heater control
- Retrofit of continuously running fans
Selection and installation notes
Place the sensor in the air path that represents the cabinet, usually near the exhaust. A sensor next to a heater or in direct sun makes the control loop wrong.
Check whether the thermostat switches the fan directly or a contactor coil. Larger fans should not be switched through a small thermostat contact.
FAQ
NO or NC contact?
NO for cooling, where the contact closes on rising temperature; NC for heating, where it opens on rising temperature.
Can it switch a large fan directly?
Only within its contact rating. Above that, use the thermostat to switch a contactor coil.
Where should the sensor go?
In the exhaust air path, away from heaters, direct sunlight and draughts.
Does it include a heater output?
Some models offer changeover control. Tell us whether you need cooling only or cooling and heating.
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