MinusA2 Maintenance
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A simple guide to install your MinusA2 filters
How often should I clean or replace the filters?
FiltersReplacement Cleaning Cost
Pre-Filter Permanent/Washable Every Month $14.95
Medium Every 12 Months* Not Required Included in the filter kit ($85)
BioGS HEPA Every 12 Months* Not Required Included in the filter kit ($85)
Customized Every 12 Months* Not Required Included in the filter kit ($85)
AC Charcoal Every 12 Months* Not Required Included in the filter kit ($85)
*Based on 24/7 operation and average indoor air quality
How do I clean the filters?

The Pre-Filter should be cleaned depending on the air quality of the room.

clean MinusA2 pre-filter procedure

To clean the Pre-Filter - vacuum method :

  1. Remove front panel from the air purifier
  2. Run a vacuum cleaner with a nozzle or brush attachment on low power setting along the Pre-Filter to remove visible particles.

If vacuuming does not seem to sufficiently clean your Pre-Filter, please follow the steps below to wash it.

To clean the Pre-Filter - washing method:

  1. Remove the Pre-Filter from the unit
  2. Fill the sink with lukewarm water and gently wash the Pre-Filter under the water for 2-3 minutes or until it is completely clean.
  3. Rinse the Pre-Filter with clean tap water.
  4. Use a towel to remove any excess water from the Pre-Filter
  5. Allow the Pre-Filter to dry for 12-24 hours.
  6. When the Pre-Filter is completely dry, place back into the air purifier.
How do I install the filters?
1. Remove the front panel by lifting from the bottom and pulling up.
Remove the front panel from the air purifier
2. Remove the filter case by grasping the handles on either side and pulling forward. Lay the filter case on a flat surface.
Remove the filter case from the air purifier
3. Pull the tabs on the front of the Pre-filter to remove it.
Remove the pre-filter from the filter case
4a. Remove the white Medium Filter from the black frame to discard the plastic wrapping. Return the filter to its frame.
Remove the Medium Filter from the filter case
4b. Remove the plastic wrapping from Medium Filter and return the filter to its frame
5. Remove HEPA Filter and discard plastic wrapping.
Remove the HEPA filter from filter case and discard plastic wrapping
6. Remove the Customized Filter from the black frame to discard plastic wrapping. Return the filter to its frame. Make sure the front of the filter is facing up. See Customized Filter chart on Step #8 to identify the front of your specific filter.
Remove Customized Filter from its casing and discard the plastic wrapping
7. Pull out the Activated Carbon Filter and discard plastic wrapping.
Pull out the charcoal filter and discard plastic wrapping
8. Return the filters to the filter case in the following order from back to front: (back) Activated Carbon Filter, Customized Filter, HEPA Filter, Medium Filter, Pre-filter (front).
Put the filters back into the unit in order
9. Return filter case to the unit. Slide the bottom of the case back into the unit (1), then press the top in (2).
Put the filter case into the unit
10. Reattach the front panel by latching the top hooks, then securing the bottom of the panel.
Reattach the front panel back on the air purifier
How do I clean the particle sensor?

Clean particle sensor every three to six months.
Clean the air intake and outlet using a vacuum or soft brush.

MinusA2 particle sensor area
  1. Open the particle sensor cover on the right side of the unit (when facing the unit).
  2. Use a damp cotton swab to clean and dry the lens, dust inlet and dust outlet.
What additional maintenance is required for the MinusA2?
Clean the air intake and outlet

Air intake and outlet

Clean the air intake and outlet with a soft brush.

Be careful not to drop the brush into the unit.



Clean the front panel

Front panel

Remove the front panel from the unit and use a dry cloth or soft brush to dust it off.

Use a damp cloth to remove stubborn stains and dirty buildup if necessary. Avoid commercial cleaning products.



Clean the mood light lens

Mood light lens

Remove the front panel from the unit and use a dry cloth, soft brush, or cotton swab to dust off the mood light lens on the back of the panel.

Use a damp cloth to remove stubborn stains and dirty buildup if necessary. Avoid commercial cleaning products.



Clean the air purifier surface

Unit surface

Use a dry and soft cloth to clean the unit

Use a wet cloth if necessary but do not use a polisher.

How do I reset the filter replacement indicator?

1. Make sure your MinusA2 air purifier is turned on. You will see that the red filter replacement indicator is lit.
2. Press and hold the Mode button.
3. Now the red filter replacement indicator is off. If you require assistance, please call 888-886-8862.