The 450EP is the correct replacement pad for the following models:
The 450 EP is a compatible humidifier pad replacement for the Autoflo Humidifier Pad for Autoflo 400BP 450 1400. This evaporator pad, which fits several brands of Autoflo humidifiers, helps distribute water evenly throughout your humidifier. This humidifier pad features an extended life with a reinforced filter that makes it durable and long lasting.
This humidifier water pad also boasts micro-free antimicrobial treatment that protects the filter against the growth of mineral deposits, mold, fungus, algae, and bacteria. In order to maintain your humidifier's high quality output, be sure to replace these humidifier pads every two months.