PTF & PTDD series Inline Duct Fans are well suited for indoor
exhaust fresh air systems, ventilation, and humidification.
Each fan includes smart wired technology that can detect the
environmental temperature and adjust the motor speed from
Low, Medium, and High. It also includes a room temperature
display and a timer setting that can be set from 1-30 minutes.
Service life is enhanced by a relay switch that has been tested
for greater than 100,000 times.