The Carrier 318501-761 is the correct replacement for the following humidifiers:
The Carrier 318501-761 Humidifier Water Filter Pad helps your humidifier generate the humidity needed during the heating season. Designed with honeycomb filtration, this Carrier water filter pad traps mineral pollutants found in your water and helps to keep them from entering your home.
Carrier Humidifier Water Filter Pad specifications:
Carrier 318501-761 Humidifier Filter Installation Instructions:
For optimum performance, this Carrier foam drum humidifier filter media should be replace twice a season or more frequently if you are located in hard water areas.