Foust Air Sentry Pleated Pre-Filter is the first stage of filtration. The Pleated Pre-Filter protects the motor and the HEPA filter. It should be replaced every 2-3 months.
Foust Air Sentry Pleated Pre-Filter is the first stage of filtration. The Pleated Pre-Filter protects the motor and the HEPA filter. It should be replaced every 2-3 months.