Air Filter LookupAir purifier filter finder

Honeywell model lookup

Honeywell 18100 replacement filter

Honeywell 18100 uses Filter A Odor Reducing Carbon Pre-Filter (part HRF-AP1) as its primary replacement filter set.

Quick fit check

Match the exact filter before buying

The official manufacturer source identifies these primary parts for the Honeywell 18100.

Pre-filter and odor reduction layer Filter A Odor Reducing Carbon Pre-Filter HRF-AP1
View part details Official Honeywell source

Cited package contents

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

Filter A Odor Reducing Carbon Pre-Filter HRF-AP1

All compatible part numbers

Primary, optional, specialty, and alternative filters are listed separately so you can match the role as well as the part number.

Filter Part number Role Source
Filter A Odor Reducing Carbon Pre-Filter HRF-AP1 Pre-filter and odor reduction layer Honeywell Plugged In Filter A Page

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 A Odor Reducing Carbon Pre-Filter HRF-AP1

The official Honeywell Plugged In Compatible with field lists HRF-AP1 for the 10500, 10590, 11150, 12500, 13300, 13520, 13530, 14500, 17000, 18100, 40000, 50100, 50150, 50200, 50250, and 50300 series; model 13503; the HPA090, HPA100, HPA200, and HPA300 series; HPA3000; and HPA5000 series models.

Source checked
Replacement guidance
Honeywell recommends replacing the HRF-AP1 Filter A pre-filter every 3 months. The package contains 1 cut-to-size pre-filter roll.
Guidance checked

Buying checklist

How to choose the right replacement

Match the Honeywell 18100 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 A Odor Reducing Carbon Pre-Filter HRF-AP1: Honeywell recommends replacing the HRF-AP1 Filter A pre-filter every 3 months. The package contains 1 cut-to-size pre-filter roll.

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 A Odor Reducing Carbon Pre-Filter filter set HRF-AP1

The calendar reminder starts 3 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 18100 use?

The Honeywell 18100 uses Filter A Odor Reducing Carbon Pre-Filter (HRF-AP1). Each part number on this page is backed by an official Honeywell source.

How often should I replace the Honeywell 18100 filter?

Honeywell recommends replacing the HRF-AP1 Filter A pre-filter every 3 months. The package contains 1 cut-to-size pre-filter roll.

Where can I check replacement filters for the Honeywell 18100?

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.