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© 2018 Kaz USA, Inc. A Helen of Troy Company 400 Donald Lynch Blvd. Marlborough, MA 01752. Honeywell is a trademark of Honeywell International Inc., used under license by Helen of Troy Limited.

Honeywell HFD303C AirGenius 3 Air Purifier with Permanent Filters for Medium - Large Room


Get to know your air purifier.

Everything you need to keep your air purifier running smoothly.

Frequently Asked Questions

  • My brand new unit was missing an owner's manual, what should I do?

    If this is the case, contact the Kaz Company to have one mailed or emailed.

  • Where can I recycle this product?

    For responsible recycling, please visit

  • My unit will not turn on.

    The air purifier has safety features to ensure that the unit is ready for operation. Check to make sure both HEPA-type filters are installed flush to the air purifier. Check to make sure the rear cover is installed flush with the unit and is locked.

  • My Air Purifier is starting to make noise and the air output is less. What's wrong?

    The filters may be dirty. High amounts of contaminates can block the pores in the filter and stop the air from moving through it. Clean the Filters.

  • How long should I run my Air Purifier?

    For best results, you should operate your Air Purifier 24 hours a day when possible. This unit will be more effective when doors and windows are closed.

  • Can I wash my odor reducing K pre-filter?

    No. Washing the odor reducing K pre-filter will destroy it. You can, however, wash the sponge like permanent pre-filter.


Still can’t find what you’re looking for?

Call us at 1.800.477.0457 or

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