How to Replace Dyson Air Purifier Filters: A Complete Guide for Optimal Performance and Longevity​

If you own a Dyson air purifier, regular filter replacement is not just a maintenance task—it’s critical to maintaining clean indoor air, ensuring your device operates at peak efficiency, and extending its lifespan. Dyson’s advanced purification technology relies on two key filters: a pre-filter and a HEPA + activated carbon main filter. Over time, these filters trap pollutants like dust, pet dander, pollen, smoke, and volatile organic compounds (VOCs), gradually becoming clogged. Failing to replace them leads to reduced airflow, diminished cleaning performance, and even potential bacterial growth within the device. This guide will walk you through why filter replacement matters, how to spot when it’s time, step-by-step instructions for replacing filters on popular Dyson models, tips for buying genuine parts, and post-replacement care to keep your purifier running effectively for years.

Why Dyson Air Purifier Filters Need Regular Replacement

Dyson air purifiers are engineered with a dual-filter system designed to capture 99.95% of ultrafine particles as small as 0.1 microns (depending on the model). Here’s why each filter type requires attention:

1. The Pre-Filter: Trapping Large Particles

The pre-filter is the first line of defense, capturing larger debris like hair, fur, and dust bunnies. While it’s washable (more on that later), it still accumulates grime over weeks or months. A clogged pre-filter forces the device to work harder to pull air through, reducing overall airflow and straining the motor. This not only lowers purification efficiency but can also lead to overheating or premature wear on internal components.

2. The HEPA + Activated Carbon Main Filter: Targeting Microscopic Pollutants

The main filter combines a HEPA (High-Efficiency Particulate Air) layer to trap fine particles (pollen, mold spores, bacteria) and an activated carbon layer to adsorb odors and gases (cooking fumes, VOCs from furniture or cleaning products). Over time, these layers become saturated with trapped pollutants. A saturated HEPA filter can no longer capture new particles effectively, while a full carbon layer stops neutralizing odors and may even release trapped gases back into the air—a phenomenon known as “off-gassing.”

Dyson’s own testing shows that after 6–12 months of typical use, both filters lose efficiency by 15–30%, depending on environmental factors. In homes with pets, smokers, or high pollution levels, this decline accelerates, making timely replacement non-negotiable for maintaining clean air.

How to Know When It’s Time to Replace Your Dyson Filters

Dyson devices are equipped with smart features to alert you when filters need changing, but relying solely on these reminders isn’t always enough. Here’s how to stay proactive:

1. Check the Device’s LCD Screen or App

Most modern Dyson purifiers (like the Purifier Cool™, Formaldehyde™, or Hot+Cool™ series) display a filter replacement icon—usually a filter symbol with a red cross or exclamation mark—when replacement is due. The Dyson Link app (for smart models) also sends push notifications. Note: These reminders are programmed based on average usage; if you run your purifier 24/7 or live in a polluted area, they may trigger earlier.

2. Manual Inspection of the Pre-Filter

Even if the device doesn’t alert you, inspect the pre-filter monthly. Remove it (following the steps in the “Replacement Guide” below) and hold it up to a light. If it’s dark gray or black with trapped debris, or if it feels heavy with dust, wash it (if washable) or replace it if it’s a non-washable model.

3. Observe Changes in Performance

A telltale sign of a clogged filter is reduced airflow—you may notice the purifier’s fan sounds louder as it struggles to pull air, or the room takes longer to feel fresh after turning it on. If odors linger despite the purifier running, the carbon layer is likely saturated.

4. Environmental Factors Matter

Adjust your replacement schedule based on your home’s conditions:

• ​Pet owners: Replace every 6 months (pet dander and hair clog filters faster).

• ​Smokers or homes with frequent cooking: Every 6–8 months (smoke and grease particles overload filters).

• ​Allergy or asthma sufferers: Every 6 months to ensure maximum particle capture.

• ​Low-pollution homes: Up to 12 months, but still check pre-filters monthly.

Step-by-Step Guide to Replacing Dyson Air Purifier Filters

While exact steps vary slightly by model, the process for most Dyson purifiers (including the Purifier Cool™ TP07, Formaldehyde™ TP09, and Hot+Cool™ HP07) follows this pattern:

Tools You’ll Need:

• New genuine Dyson filter set (pre-filter and main filter; some models use a combined filter).

• Soft, dry cloth (to wipe internal components).

Step 1: Turn Off and Unplug the Purifier

Safety first—always power down the device and unplug it from the wall to avoid electrical hazards.

Step 2: Open the Front Cover

For most models, press the release button (usually located on the top or side of the front panel) and gently pull the cover forward. Set it aside in a clean area.

Step 3: Remove the Old Filters

Locate the filter housing—typically a black or silver compartment inside the purifier. Slide out the old pre-filter and main filter (some models have a single combined filter). If the filters are stuck, avoid yanking; wiggle them gently or refer to your model’s manual for specific instructions.

Step 4: Dispose of Old Filters Properly

Seal the old filters in a plastic bag before throwing them away. This prevents trapped dust and allergens from spreading into your home.

Step 5: Prepare the New Filters

Remove the new filters from their packaging. Most Dyson filters come with a protective film; peel this off carefully to expose the sticky carbon layer (on the main filter) and open pre-filter pores.

Step 6: Install the New Filters

Align the new pre-filter with its housing (look for labeled tabs or grooves) and press it into place. Next, insert the main filter, ensuring it sits flush with the edges—Dyson filters are designed with a directional fit; an arrow or “This Side In” label indicates the correct orientation.

Step 7: Close the Front Cover

Snap the front panel back into place until it clicks securely.

Step 8: Reset the Filter Replacement Reminder

On the device’s LCD screen, navigate to Settings > Filter Status > Reset. For smart models, do this via the Dyson Link app: go to your device’s page, select Filters, and tap “Reset.”

Buying Genuine Dyson Filters: Why Quality Matters

Using non-genuine or third-party filters is a common mistake, but it risks damaging your purifier and compromising air quality. Here’s why genuine Dyson filters are worth the investment:

1. Perfect Fit and Sealing

Dyson designs its filters to match the exact dimensions and sealing requirements of each model. Third-party filters may be too loose or too thick, allowing unfiltered air to bypass the filter media—a phenomenon called “air leakage.” This means pollutants slip through, rendering your purifier ineffective.

2. Certified Performance

Genuine Dyson filters undergo rigorous testing to meet HEPA H13 standards (capturing 99.95% of particles ≥0.1 microns) and activated carbon efficiency. Counterfeit filters often use lower-grade materials that fail to trap fine particles or neutralize odors.

3. Device Warranty Protection

Using non-Dyson parts can void your purifier’s warranty. If your device malfunctions due to a third-party filter, Dyson may refuse repairs or replacements.

​Where to Buy Genuine Filters:​​

• ​Dyson’s Official Website: Offers the widest selection, including model-specific bundles and subscription services for automatic delivery.

• ​Authorized Retailers: Amazon (check for “Ships from and Sold by Amazon” or “Dyson Authorized”), Best Buy, or other certified partners.

• ​Dyson Demo Stores or Service Centers: Local options for immediate pickup.

Post-Replacement Care: Extending Filter Life and Device Performance

Replacing filters is only part of the equation. To maximize their effectiveness and keep your purifier running smoothly:

1. Clean the Pre-Filter Regularly

Even if you replace the main filter, wash the pre-filter every 2–4 weeks. Most pre-filters are machine-washable (check your model’s manual); use cold water on a gentle cycle, then air-dry completely before reinstalling. A clean pre-filter captures larger debris, reducing the load on the main filter.

2. Keep the Purifier in a Well-Ventilated Area

Avoid placing your purifier in corners or behind furniture, which restricts airflow and forces the device to work harder. Leave at least 1 foot of space around all sides for optimal circulation.

3. Address the Source of Pollution

To reduce filter wear, tackle pollutants at their origin: vacuum carpets weekly, use a kitchen exhaust fan while cooking, and avoid smoking indoors. This not only extends filter life but also improves overall air quality.

4. Store Spare Filters Properly

If you buy filters in bulk, store them in their original packaging in a cool, dry place. Avoid exposure to moisture or extreme temperatures, which can degrade the filter media.

Common Questions About Dyson Filter Replacement

​Q: Can I wash the main HEPA + carbon filter?​​

No. The main filter’s HEPA and carbon layers are not washable. Water damages the delicate fibers and reduces their ability to trap particles or adsorb gases. Always replace the main filter when it’s saturated.

​Q: Why does my purifier smell after replacing the filter?​​

This is usually due to residual odors in the purifier’s housing. Wipe the interior with a damp cloth (use mild soap if needed) and let it air out for a few hours before reuse. If the smell persists, contact Dyson support—your new filter may be defective.

​Q: Do I need to replace the filter more often if I use the “Night Mode”?​​

Night Mode reduces fan speed, which lowers airflow but doesn’t stop particles from accumulating on the filter. You’ll still need to replace filters based on usage time, not just fan speed.

Final Thoughts: Invest in Clean Air, One Filter at a Time

Replacing your Dyson air purifier filters isn’t just a chore—it’s an investment in your health and the longevity of your device. By understanding why filters matter, learning to spot replacement cues, following proper installation steps, and choosing genuine parts, you’ll ensure your purifier continues to deliver fresh, clean air for years. Remember: a well-maintained Dyson purifier isn’t just a machine—it’s your first line of defense against indoor pollutants, keeping your home healthier for you, your family, and even your pets. Don’t wait for performance to decline—schedule your next filter replacement today.