Definition of frost stat in English:
A thermostat used to turn on a heating system automatically when the ambient temperature drops below a set threshold.
- Perhaps a pipe stat on the return would shut the frost stat down once the return water is warm.
- Typically on systems with external frost stats the norm would be to set these at between 1 and 4 degrees C.
- Using a frost stat means that if you have a mild day, the tubes aren't running needlessly and this saves electricity.