RF Airwatch Upgrade for F100F F35F F25F Media Air Cleaners. Fits these units with a 20x20 or 20x25 filter. Door measures 21Â¼ x 6Â¼ x 2Â¾ ". Includes the door with RF transmitter and wall-mountedÂ W8600BÂ AirWatch Indicator. The W8600B includes a lithium battery (type CR123A) and 2 mounting screws. The door also requires a lithium battery (type CR123A) that is also included. No wiring is necessary, simply snap on the door and wall mount the indicator.
The door transmits air cleaner filter change status to the wall-mounted AirWatch Indicator. When the air cleaner filter begins restricting airflow because of accumulated dirt, the built-in pressure sensors in the door detect that airflow is impaired and that the filter requires cleaning. This condition causes the indicator light on the door to begin flashing and the transmitter to send a signal to the wall-mounted RF AirWatch Indicator that the filter needs replacing.