Assertion: fanjet's fan | /r/CapableOf | use wind machines
Facets:
value: for freeze protection
type: PURPOSE
Source sentences:
text: When using wind machines for freeze protection, the fans should be started while the temperature measured at about 1.5 m (5 ft) height is above the critical damage temperature and before the 1.5 m height temperature falls much below the 10 m (33-ft) height temperature.