HEPA Filter Replacement: When and How to Change It

By Vornado Air | Experience. Perfect. Comfort. | Published: 2026-10-28

Category: How-to Guides

Learn when to replace your Vornado HEPA filter and follow our step-by-step guide to keep your air purifier performing at its best.

Quick Answer

Replace your Vornado HEPA filter every six months to maintain true whole-room purification, and follow the simple steps below to do it safely and correctly.

Why Six Months? The Science of Filter Clogging

Over time, your HEPA filter begins to clog, reducing the amount of air that is filtered. Even if your air purifier still runs, a clogged filter can't capture particles effectively, which means your indoor air quality suffers silently.

Vornado recommends changing your filter every six months. This interval balances filter lifespan with performance, ensuring you get the 99.97% capture rate your purifier is designed to deliver. Waiting longer may save a few dollars now but can cost you in reduced air quality and increased strain on the unit.

Genuine Vornado Filters vs. Third-Party Options

You might see cheaper 'compatible' filters online, but Vornado air purifiers are only tested to achieve a 99.97% capture rate using a genuine Vornado HEPA filter. Third-party filters may not fit perfectly or filter as effectively, compromising your air quality.

Using a genuine Vornado filter ensures proper fit and performance, and it's the safest choice for maintaining your purifier's warranty and efficiency.

How to Replace Your HEPA Filter

Turn Off and Unplug the Purifier: Always power down and unplug your Vornado air purifier before opening the filter compartment. This prevents any electrical hazard and ensures your safety during the process. Never attempt to change the filter while the unit is plugged in.
Open the Filter Compartment: Locate the filter access door on your purifier (usually on the back or bottom). Gently release the latch or slide the cover open. If you're unsure, check your model's manual for the exact location. If the door feels stuck, double-check for a release button—don't force it.
Remove the Old Filter: Carefully pull out the old filter cartridge. Dispose of it properly—some components may be recyclable, but check local regulations. Avoid shaking it to prevent releasing trapped dust. Wear gloves or wash your hands immediately after handling the old filter.
Insert the New Genuine Vornado Filter: Unpack your new Vornado 3-in-1 True HEPA Filter Cartridge. Place it into the compartment, ensuring it sits flush and aligns with any guides or arrows. Do not remove the plastic wrap until you're ready to install. If the filter doesn't slide in easily, check the orientation—don't force it.
Close the Compartment and Reset the Timer: Close the access door securely until it clicks. If your model has a filter replacement indicator, reset it by pressing the reset button (usually held for 3-5 seconds). Skipping the reset may cause the indicator to stay on, confusing future maintenance.
Plug In and Run the Purifier: Plug the unit back in and turn it on. Run it at high speed for at least 30 minutes to circulate air and confirm the filter is seated correctly. Listen for any unusual noises that might indicate improper installation. If you notice a rattling sound, turn off the unit and reseat the filter.

Product Spotlight: Genuine Vornado Filter

MD1-0039 3-in-1 True HEPA Filter Cartridge: Vornado's 3-in-1 True HEPA Filter Cartridge is designed to maintain true Whole Room Air Purification and is tested to achieve a 99.97% capture rate. Using this genuine cartridge every six months ensures your purifier performs as intended, keeping your air clean and your unit running efficiently.
MD1-0039 3-in-1 True HEPA Filter Cartridge