Replacer Guide
DirectoryHumidifierHoneywellFILTER M/FILTER D/FILTER I
Replacement for Honeywell FILTER M/FILTER D/FILTER I
FITS HAC-504
HumidifierB077QNPNN4

Honeywell FILTER M/FILTER D/FILTER I

This page shows what the listing itself states: the part number, the brand it names, and the category. We have not tested this part. Under the Magnuson-Moss Warranty Act, using a third-party part does not by itself void a manufacturer warranty — the burden of proof is on the manufacturer.

BrandHoneywell
ModelFILTER M/FILTER D/FILTER I
CategoryHumidifier
Fits PartHAC-504
ASINB077QNPNN4
Compatibility
Spec-matched to HAC-504. Confirm the part number on your unit before buying.

Paid links. As an Amazon Associate, Replacer Guide earns from qualifying purchases. This page links to Amazon; the price, availability and delivery terms are the ones shown on Amazon at the time you look, and we do not reproduce them here. Links never change what we write — see how we evaluate.

Fits
HAC-504
Warranty
Maker must prove the part caused the damage

Installation Guide

1

Step 1: Unplug your Honeywell device to ensure safety during the replacement process. It's crucial to disconnect the power source to prevent any electrical hazards or accidental turn-ons while you work.

2

Step 2: Open the filter compartment by following the manufacturer's instructions. This usually involves sliding a panel or removing screws, ensuring you have access to the old filter.

3

Step 3: Carefully remove the old filter, taking note of how it is positioned. Dispose of the used filter properly, as it may contain allergens and contaminants that could affect your health.

4

Step 4: Insert the new Honeywell FILTER HAC-504 into the compartment, ensuring it is securely in place and correctly oriented. Close the filter compartment and plug your device back in, ready to enjoy cleaner, fresher air!