Air Filter LookupAir purifier filter finder

Honeywell model lookup

Honeywell HPA120 replacement filter

Honeywell HPA120 uses Filter O 3-in-1 HEPA Replacement Filter (part HRFO1) as its primary replacement filter set.

Honeywell HPA120 filter match

Primary replacement filter set Filter O 3-in-1 HEPA Replacement Filter HRFO1
Check current eBay prices

Sponsored eBay links. We may earn a commission from qualifying purchases.

View part details Official Honeywell source

Cited package contents

Package details below come from the linked official source; recheck it before buying.

Filter O 3-in-1 HEPA Replacement Filter HRFO1

All compatible part numbers

All compatible part numbers listed below are primary replacement filters for this model.

Filter Part number Role Source Marketplace
Filter O 3-in-1 HEPA Replacement Filter HRFO1 Primary replacement filter set Honeywell Plugged In Filter O Page Check prices

Official compatibility record

Manufacturer evidence

Each compatibility and care statement below is reproduced from the cited official manufacturer record. Check the source again before ordering.

Filter O 3-in-1 HEPA Replacement Filter HRFO1

The official Honeywell Plugged In Compatible with field lists HRFO1 for HPA120 and HPA125 Allergen Plus Tabletop Air Purifier models.

Source checked
Replacement guidance
Honeywell recommends replacing 3-in-1 Filter O HEPA filters every 9 to 12 months.
Guidance checked

Buying checklist

How to choose the right replacement

Match the Honeywell HPA120 model label and the exact part number above. Marketplace listings can be OEM or aftermarket, and a similar-looking filter may have different dimensions.

Compare the listing title, product photos, included filter pieces, seller details, delivery estimate, and total price before you order.

Care guidance

Replacement schedule

  • Filter O 3-in-1 HEPA Replacement Filter HRFO1: Honeywell recommends replacing 3-in-1 Filter O HEPA filters every 9 to 12 months.

Usage and air quality can affect service life. Follow the cited manufacturer guidance for each part.

Optional calendar tool

Plan your next filter change

Choose a date to download a calendar reminder based on the cited replacement guidance.

Filter O 3-in-1 HEPA Replacement Filter filter set HRFO1

The calendar reminder starts 12 months after this date and repeats on that schedule.

Your date is processed only in this browser. The .ics calendar file is generated locally on your device and is not uploaded to this site.

Keep browsing

Frequently asked questions

What filter does the Honeywell HPA120 use?

The Honeywell HPA120 uses Filter O 3-in-1 HEPA Replacement Filter (HRFO1). Each part number on this page is backed by an official Honeywell source.

How often should I replace the Honeywell HPA120 filter?

Honeywell recommends replacing 3-in-1 Filter O HEPA filters every 9 to 12 months.

Where can I check replacement filters for the Honeywell HPA120?

This page links directly to the cited official Honeywell product page and shows sponsored individual eBay listings when a fresh exact-part snapshot is available, with an exact-part eBay search fallback. This site does not sell filters; match the part number and review the current source or seller listing before buying.