  
30"W x 28"D x 51"H
250E models require one main filter and one safety filter.
"E" models feature our Advanced Filter Monitoring System
which includes the following features:
- Digital display of airflow velocity
- Audible and visual alarms for low airflow and hydrocarbon breakthrough
- Filter saturation alarms
- Sensor that adjusts blower speed to maintain air velocity
- Display of filter type
- Time tracking of filter use
- Safety filter to prevent chemical breakthrough even after main filters
are completely saturated
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