Best Air Purifiers of 2025: Tested & Reviewed
- Elizabeth Mooreland
- Apr 9
- 5 min read
Updated: Jul 23
In 2025, a breath of fresh air at home is more than just a luxury. It’s a necessity. With rising concerns over air pollution, seasonal allergens, wildfire smoke, and even indoor toxins from cleaning products and furniture, it’s no wonder that air purifiers have become one of the most sought after smart appliances for modern households.
But with so many models claiming to clean your air better than the next, how do you know which one is truly effective and worth your money?
We’ve tested and reviewed a wide range of air purifiers to bring you the best air purifiers of 2025, focusing on performance, noise levels, smart features, design, and value for money. Whether you’re managing allergies, have pets, or simply want to improve your indoor air quality, there’s something here for everyone.
Why You Might Need an Air Purifier
Before diving into our top picks, let’s take a moment to consider why air purifiers are becoming essential in British homes:
Indoor air can be up to 5x more polluted than outdoor air, especially in well sealed modern homes.
Common pollutants include dust mites, pet dander, mould spores, VOCs (volatile organic compounds), and smoke.
Children, the elderly, and those with asthma or allergies are most at risk from poor indoor air quality.
Air purifiers can help reduce airborne viruses and bacteria, offering peace of mind during flu season or cold outbreaks.
The Best Air Purifiers of 2025: Our Top Picks
Here’s our curated list of the best performing air purifiers on the market in 2025, each tested for different needs and room sizes.
1. Dyson Purifier Big+Quiet Formaldehyde: Best for Large Rooms
Price: £849.99
Best for: Large, open plan spaces and homes with high air quality concerns
Coverage: Up to 100m²
Filtration: HEPA H13 + activated carbon + formaldehyde destruction
Smart features: MyDyson app, voice control (Alexa/Siri/Google), real time air quality display
Why We Love It: Dyson’s flagship model for 2025 lives up to its name, whisper quiet even at high settings and incredibly powerful. It not only traps ultrafine particles but also destroys formaldehyde, a harmful gas found in many homes due to paints, glues, and furnishings. Perfect for allergy sufferers or anyone doing home renovations.
2. Levoit Core 600S: Best Value for Money
Price: £299.99
Best for: Families on a budget who still want excellent performance
Coverage: Up to 147m²
Filtration: True HEPA H13 + activated carbon
Smart features: VeSync app, voice control, auto mode
Why We Love It: Levoit continues to impress with performance that rivals high end models at a more accessible price. The Core 600S is ideal for large rooms, with super low energy consumption and a near silent sleep mode. If you're after clean air without spending a fortune, this is a brilliant choice.
3. Blueair HealthProtect 7470i: Best for Allergy Relief
Price: £699
Best for: People with asthma, hay fever or pet allergies
Coverage: Up to 95m²
Filtration: HEPA Silent Ultraâ„¢ + activated carbon
Smart features: Blueair app, sensors, smart scheduling, voice assistant compatibility
Why We Love It: Combining top tier filtration with whisper quiet operation, the 7470i stands out for its ability to capture pollen, pet dander, and even airborne viruses. Its clean Scandinavian design and intuitive interface also make it one of the most user friendly purifiers we tested.
4. Mila Air Purifier: Best Smart Features
Price: Starting from £450
Best for: Tech savvy households who want custom control
Coverage: Up to 83m² (varies by filter)
Filtration: Multiple customisable filter types
Smart features: Mila app, real-time pollution graphs, auto adjustments, child lock, pet mode
Why We Love It: Mila offers a fully customisable air cleaning experience. From smart learning to geolocation triggered start times, this purifier is as clever as it is powerful. It even provides playful air quality updates and can automatically adjust for pet activity, open windows, or pollen spikes.
5. Philips Series 3000i AC3033/30: Best for Bedrooms
Price: £449
Best for: Light sleepers and those looking to purify their sleep space
Coverage: Up to 104m²
Filtration: NanoProtect HEPA + activated carbon
Smart features: Air+ app, silent mode, night sensing, Alexa/Google compatible
Why We Love It: This Philips model balances elegant design with ultra quiet operation, perfect for bedrooms or nurseries. The air quality sensor is particularly responsive, and the soft night glow ring gives peace of mind without disrupting sleep.
6. Shark Air Purifier 6: Best for Households with Pets
Price: £329.99
Best for: Pet owners dealing with odours, dander, and fur
Coverage: Up to 64m²
Filtration: HEPA + advanced odour lock filter
Smart features: Clean Sense IQ, touchscreen display, auto mode
Why We Love It: Shark’s purifier is designed with pet households in mind. It tackles both allergens and pet odours efficiently, and its Clean Sense IQ technology automatically boosts power when indoor pollution rises. Plus, the filter lasts up to 6 months even in high shedding homes.
What to Look For When Buying an Air Purifier
To make the right choice for your home, keep the following in mind:
True HEPA Filtration
Look for HEPA H13 or higher to trap 99.97% of particles as small as 0.3 microns, including pollen, mould, and dust mites.
Room Size Coverage
Choose a model appropriate for your space. Oversizing is better than under sizing.
CADR Rating
CADR (Clean Air Delivery Rate) indicates how quickly the purifier can clean the air. The higher the number, the faster the cleaning.
Filter Replacement Cost
Filters need replacing every 6 to 12 months. Check the price and availability before you buy.
Noise Levels
Measured in decibels (dB). Under 30dB is considered whisper quiet, ideal for bedrooms.
Energy Efficiency
If you plan to run it all day, look for Energy Star certified models.
Smart Features
App control, auto modes, and air quality monitoring make managing air quality easier and more precise.
Who Needs an Air Purifier the Most?
While everyone can benefit from cleaner air, air purifiers are especially helpful for:
Allergy sufferers (especially during spring and autumn)
Pet owners dealing with dander and smells
Homes near busy roads or urban pollution
Households with wood burners or gas stoves
Parents of babies or toddlers
Elderly or immunocompromised individuals
Even if you don’t fall into any of these categories, investing in an air purifier can still reduce long term health risks associated with poor air quality.
Can’t I Just Open a Window?
Natural ventilation is great when outdoor air is clean. But in cities, near main roads, or during high pollen counts, you may be letting in more pollutants than you're getting rid of.
Air purifiers complement fresh air, particularly in colder months when windows stay shut. They also help in newly decorated rooms, which can off gas volatile compounds from paints and glues for weeks.
How to Maintain Your Air Purifier
Change filters on time: Follow manufacturer guidelines
Vacuum pre filters regularly to extend filter life
Wipe sensors and grilles monthly
Keep it running: For best results, let it run continuously on auto mode
Final Thoughts: Breathing Better in 2025
Whether you’re looking to ease allergies, reduce pet odours, or simply create a healthier home environment, today’s air purifiers are smarter, quieter, and more effective than ever before.
Choosing the right one depends on your needs: Large space? Go for Dyson. Budget conscious? Choose Levoit. Allergies? Blueair is your friend. Need quiet for sleep? Philips is the winner.
Remember, the best air purifier is one that fits seamlessly into your life, quietly working in the background to help you breathe a little easier, every single day.
— Elizabeth Mooreland, Smart Home & Appliances | The Tech Advisor