A disadvantage of the atomizing humidifier is:
a. Its evaporation plates clog up due to the salt left behind after evaporation
b. The salts that were in the water before atomization and evaporation settle as white dust in rooms and ducts
c. It can be used only as an individual area or room humidifier
d. Its evaporation plates have to be replaced regularly
e. It has a lower humidification rate than the pan type humidifier
Answer: B