Unit calculates conditions in HVAC
WindScribe reads wind speed, temperature and wind chill in ventilation shafts, air conditioning conduits, air ducts, chimney flues and many other locations. Ideal for construction and inspection activities. Use in welding, high-rise and crane operations, spray application, odor control and elsewhere. Palm-sized unit calculates wind speed from 0 to 150 mph, highest positive speed (headwind), lowest negative wind speed (tailwind), 5-second average and running average. It determines current temperatures from minus 40 F to 150 F, as well as in centigrade. Davis Instruments, Hayward, Calif.