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Air Purifier Maintenance
Cleaning Your Air Purifier
Proper maintenance of your Hunter Air Purifier will help ensure years of trouble free
service.
Follow these steps to properly maintain your air purifier:
1. Approximately every 90 days, the outside of the unit should be cleaned with a soft,
damp cloth.
2. If needed, the front grill can be removed from the unit and cleaned with soapy water.
Simply remove the pre-filter before exposing the grill to water.
3. Follow the instructions in Changing the Pre-Filter and Changing the Filter (pgs. 18 and
19) to determine when and how to replace the filters.
NOTES:
• The air purifier must be unplugged during the cleaning process.
• Be sure the unit is completely dry before plugging in and using.
• Never immerse unit in water.
Changing the Pre-Filter
When the Pre-Filter Counter exceeds 2000 hours (refer to Filter Run-time Counters for
additional information pg. 11), the display will automatically switch to the Pre-Filter Dis-
play and the Pre-Filter indicator will flash as a reminder that you should replace the pre-
filter. To maintain proper odor-removing capability and overall filtration performance, the
pre-filter should be changed every 2000 hours (approximately 3 months of use). If neces-
sary, the pre-filter can be changed more often. Proper maintenance of the pre-filter will help
extend the life of the HEPA filter. Refer to Obtaining Replacement Filters (pg. 20) if you
need help finding replacement filters.
To change the pre-filter and reset the pre-filter counter:
1. First, turn off and unplug the air purifier.
2. Next, remove the front grill. For Models 30400 and 30401, place your fingers in the
recesses on either side of the top of the grill and pull firmly. For all other models,
gently press the push tabs until the front grill slides pass them and is released.
3. The pre-filter is attached to the inside of the grill with hook tape. Pull gently on
the pre-filter to removed it.
4. If needed, use a soft damp cloth to wipe off the grill.
5. Install the new pre-filter by placing it in the grill and pressing gently on the pre-
filter so that it adheres to the hook tape. You may notice a few black particles
coming off the pre-filter. Those particles are part of the odor-removing activated
carbon and will be collected on the filter during regular use.
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