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Primary replacement filter set

Honeywell Filter Y1 True HEPA Replacement Filter HRFY1 replacement filter

Filter Y1 True HEPA Replacement Filter (part HRFY1) fits Honeywell HPA4100, according to the official Honeywell product page.

Official Honeywell fit · checked

Honeywell models that use Filter Y1 True HEPA Replacement Filter HRFY1

This filter is listed for one model. Open a model to see its complete list of primary, optional, and specialty filters.

Before you order

What to check in a HRFY1 listing

  • The listing names part HRFY1. Similar-looking filters are not proof of fit.
  • Your purifier is one of the compatible models: Honeywell HPA4100.
  • The pack size and pieces included match what you need. Genuine and third-party filters can differ.
  • The total price with shipping, seller feedback, and delivery estimate work for you.

Care guidance

Replacement schedule

The cited product page does not state a fixed replacement cadence for Filter Y1; the package contains 1 True HEPA filter element.

Usage conditions can affect service life. Follow the cited manufacturer guidance for this part.

Frequently asked questions

How often should I replace the Honeywell Filter Y1 True HEPA Replacement Filter (HRFY1)?

The cited product page does not state a fixed replacement cadence for Filter Y1; the package contains 1 True HEPA filter element.

Which Honeywell models use the Filter Y1 True HEPA Replacement Filter HRFY1?

According to the official Honeywell product page, Filter Y1 True HEPA Replacement Filter (HRFY1) fits Honeywell HPA4100. Verify the model label on your unit before ordering.

Do aftermarket HRFY1 filters work?

Marketplace listings may be from the manufacturer or a third party. Match the exact part number HRFY1, review the listing details, and verify the model label on your unit before buying.

Official compatibility record

Manufacturer source

The official Honeywell Plugged In product specification states HRFY1 is designed specifically for Honeywell HPA4100 air purifiers.

Honeywell Plugged In Filter Y1 Page

Source compatibility checked 2026-08-29. Recheck the listing and your purifier label before ordering.