What is the Best HEPA Air Purifiers for Allergies?

Want to breathe easy? A HEPA air purifier truly is the only way to go. 

We have the best HEPA air purifiers for allergies, bringing you the one-stop solution to those stuffy noses and tight chests. That’s right, sneeze no more with our help.

Save yourself time and effort, let us do the hard work for you.

Best HEPA Air Purifiers for Allergies – UK Review Guide 2016

We’ve taken the time to test over 15 models of HEPA air purifier, and have spent a good 30 hours making sure they pass our checks.

Putting them through their paces is how we make sure you are always getting the best of the best. From Philips to Alen, the big names are all here. 

The point of all this? 

Quite frankly, you deserve it. All we want is for you to find a HEPA air purifier that not only fits in with your budget, but offers the power and RELIABILITY you need to breathe easy. 

For us, the Alen BreathSmart is the cream of the crop - a truly excellent piece of kit that deserves top place as the best air purifier for allergies. 

We get it, you might not be convinced by our top choice. If that’s the case then you’re in luck, we have a whole range of HEPA air purifiers that are sure to steal the show for you.

1. Editors Pick

Alen BreatheSmart Flex H13 image

Alen BreatheSmart Flex H13

2. Runner Up

Levoit Air Purifiers for the Home image

Levoit Air Purifiers for the Home 

Best Hepa Air Purifiers for Allergies Review (In Order)

1. Alen BreatheSmart Flex H13

Editors Pick 

Alen BreatheSmart Flex H13 image

This sleek air purifier from Alen is ideal for use in any indoor space, working hard to keep the air clear and also using pink noise frequencies for quiet running that’s barely noticeable.

What’s more, it has been shown to help improve sleep by an impressive 25%

  • Dimensions: 21.6 x 38.1 x 63.5cm
  • Filtration: True HEPA
  • Carbon Filter: Yes
  • Sleep Mode: Yes
  • Weight: 300g

You’ll find this model works FAST and HARD to keep the air clean, all thanks to the powerful filtration that’s able to clean a whopping 700sqft of air in just 30 minutes.

Kitted out with four different speed settings, it goes the extra mile no matter how big or small the room. 

Using a True HEPA filter, it is able to capture an impressive 99.99% of all allergens and pollutants.

That includes viruses and bacteria - if it is up to 0.1 microns in size, this hepa filter can take it.

Just remember that preventing COVID spreading is not something it can do. 

Worried about the smell of your pets or the lingering smoke after a cheeky cigarette out the window?

We’ve all been there, and the activated carbon filter will ensure those nasty odours are eliminated quickly. The filters even have a microbial compound for killing mould and nasties. 

If you’re settling down for sleep, you don’t have to worry about being kept awake by a machine that sounds more like a chainsaw than anything else. 

Sleep mode keeps that noise down low and switches off the light to create that soothing atmosphere.

  • Stylish and contemporary design that leaves you saying oo-la-la
  • Smoke? Pet smells? Leave that to the activated carbon filter to handle
  • True HEPA filtration for the best results, keeping your indoor air clean and clear
  • Four speeds that work hard and fast to pump out clean air that you can breathe
  • Putting the good in goodnight with 93% of sleep study participants getting better rest 

Love our top pick as much as us? Great. Looking for something in a lower price range? We’ve got you covered.

Allow us to introduce you to the Levoit for Home. Compact, affordable, and ready to go, we are sure that it’s going to impress you.

2. Levoit Air Purifiers for the Home

Budget Pick

Levoit Air Purifiers for the Home image

Compact, modern, POWERFUL. These are all great ways to describe this nifty little air purifier.

Made to last, every single component has been specially designed and chosen due to their durability and high-precision - for a machine that works as hard as you do.

  • Dimensions: 22 x 22 x 36cm
  • Filtration: HEPA
  • Carbon Filter: Yes
  • Sleep Mode: Yes
  • Weight: 4.11kg

It works quickly to ensure that your room is purified as quickly as possible, pumping out a truly impressive two air changes per hour in rooms as large as 40m2 thanks to the VortexAir technology.

The phrase small yet mighty comes to mind, and it will suit average-sized rooms. 

It uses a true HEPA filter that is able to capture a WHOPPING 99.97% of allergens, bacteria, and other common pollutants.

Trapping particles as small as 0.3 microns, dirty air doesn’t stand a chance when faced with this powerhouse (trust us, we did the hard work). 

If you’ve got a sneaky smoker in the house, or the smell of pets bothers you, there’s no need to worry.

The activated carbon filter in this air purifier means that odours are eliminated quickly so that you’re no longer subjected to them - fare-thee-well, wet dog! 

In addition to its four impressive speeds, it also has a night mode that ensures quiet running as low as 24dB. What’s more, it’s free from Ozone.

This means you are free from secondary pollution. What more could you want? 

  • Compact and portable, with a sleek design that makes it easy to place anywhere
  • Uses HEPA filtration to help battle allergens as well as other common pollutants
  • Nasty odours? Cigarette smoke? No longer an issue with the activated carbon filter
  • Offers you four speeds for some seriously good air purification in record time
  • Quiet as a whisper to allow you a restful night as well as a noise-free day

Not sure our budget pick is quite what you were hoping for? Allow us to clear the air and present you with our extensive list of other HEPA air purifiers.

One of these is sure to be the one you’ve been waiting for. 

3. Winix FresHome P150 Air Purifier with True HEPA

Great For Asthma Sufferers

WINIX U300 True HEPA Air Purifier with AOC Washable Carbon Filter, 30 sqm, White

This stylish air purifier has a true HEPA filter installed, as well as a five stage cleaning system.

This is particularly handy for getting rid of pet dander, mold, chemical smells, and other small microbes that could trigger allergic reaction or asthma attacks.

It also has a washable carbon filter installed.

The Plasma Wave technology breaks down odour, allergens, chemical vapours, and other pollutants so that it can create fresh air and a more breathable atmosphere. 

Plus, the advanced odour control means that it has extra sense battling against bad household odours.

I think this air purifier looks nice and is very easy to use (literally one button).

Gets a little noisy (not very though) when pollution levels are high, but that's when you know it's working hard.


  • Stylish design
  • True HEPA filter
  • 5 stage filtration system
  • Plasma Wave technology
  • Great for pet dander and mould
  • Washable carbon filter
  • Odour control
  • Good for small rooms


  • Heavy
  • Filters can be expensive

This is a fantastic air purifier for those that need to get rid of allergens and other harmful pollutants from the home.

With a five stage filtration system and innovative technology, it works hard to keep your room free from pollutants and make the air that much more breathable. At a reasonable price, this is certainly one to consider.


Q: Does this have a timer or can it be used with a plug in timer?

A: It doesn't have a timer on it but it would be fine to use a timer plug. We have two hairy dogs which is why we bought it, keeps the fluff at bat when we leave it on during the day on the auto setting. Comes on as it monitors the air quality constantly, comes on when it detects all pollutions. It's brilliant! 

4. Philips AC3259/60 Series 3000i Connected Air Purifier

 Ideal for Larger Rooms

Philips AC3256/30 Air Purifier, Anti-Allergen with NanoProtect S3 Filter

This modern purifier works incredibly quickly, capturing 99.97% of bacteria in under an hour thanks to its true HEPA filter.

It even helps to get rid of certain bacteria and viruses, helping to protect you from potential illness.

It is perfect for large rooms, with the filter and purifier having no issues when it comes to the size of the space.

It runs quietly at night, automatically switching to a lower power level as well as dimming its light so that you can sleep undisturbed.

This also means that energy consumption is minimised. It is very easy to use, and also measures the quality of the air quickly, showing you what it’s like using a colour coded indicator.

I like how quietly it can purify air when set to run on its lowest setting and it's generally easy to use.


  • Modern design
  • Ideal for large rooms
  • Ideal for allergy sufferers
  • Captures odours
  • True HEPA filter
  • Automatic night mode
  • Air quality indicator
  • Low energy consumption


  • Can be costly to run

A superb HEPA purifier, this model is great for those that needs something powerful.

Whether suffering from allergies or respiratory conditions, this ioniser is perfect for reducing the amount of pollutants in the air and creating a more breathable atmosphere. Reasonably priced, it’s a great purchase.

5. Fellowes Allergy UK Approved AeraMax DX5 Air Purifier with True Hepa Filter

Ideal for Odour Control

Fellowes Allergy UK Approved AeraMax DX5 Air Purifier with True HEPA Filter

This purifier features a four stage filtration system as well as a filter which captures 99.97% of the pollutants found in the air.

It also has a carbon filter for odour control, as well as Plasma True technology for controlled ionisation.

It goes through around five air changes per hour for the freshest and most breathable air.

The smart sensor technology detects the air levels in your room and adjusts itself accordingly. 

It is great at getting rid of pet dander, as well as helping those who suffer from asthma and allergies.

Plus, it can assist you when you have a cold or the flu, as well as keeping the air clean for new-born babies.


  • Modern design
  • HEPA filter
  • Captures odours
  • 4 stage filtration
  • 5 air changes per hour
  • Ideal for those with asthma and allergies
  • Smart sensor technology
  • Ideal for medium rooms


  • Can be noisy
  • Filters are expensive

The HEPA purifier reviews for this mode are generally favourable. It is ideal for those who have medium or large rooms and are in need to something to keep the air clear from pollutants and other harmful microbes.

Ideal for a range of situations and with great results, it is worth looking into and potentially buying for your home.

You can also check our reviews of Dyson air purifiers.

6. Honeywell HA170E1 HEPA Air Purifier

Perfect For Cat and Dog Allergies

Honeywell HA170E1 True HEPA Air Purifier

This nifty air ioniser is compact and quite portable, but does use the mains as a power point.

With a HEPA filter, it removes up to 99.97% of pollutants and bacteria to create a cleaner and more breathable atmosphere in your bedroom or any other location in the home.

It is great for those with asthma, as well as people who have cat allergies and dog allergies

It also has an electronic filter change reminder, so you know when to replace it.

It has a charcoal filter for capturing odours and eliminating them, as well as easy to use controls.


  • Nifty design
  • Compact
  • Lightweight
  • Can fit anywhere
  • HEPA filter
  • Ideal for large rooms
  • Captures odours
  • Ideal for those with asthma and allergies
  • Charcoal filter


  • Noisy
  • Expensive

This HEPA purifier for those with allergies is great at keeping allergic reactions away, as well as being a compact size for easy placement in your home.

With a HEPA filter and a charcoal filter for odour elimination, it may be a little more expensive but is definitely worth the money. A great purchase for those in need of cleaner air.

7. HoMedics HEPA Professional Air Purifier - White

Compact Design for Your Bedroom

HoMedics HEPA Professional Air Purifier - White

This stylish purifier has a compact and portable design that makes it perfect for sitting in your bedroom, purifying the air.

It has permanent HEPA filters that removes 99.97% of bacteria in the air, along with allergens and other microbes.

It is also fantastic for those with cat allergies and dog allergies.

It has three air cleaning speeds, as well as a filter check monitor and manual controls.

When the filter needs cleaning, it will let you know so that you can get it done. It comes with a 3-year warranty and is ideal for medium and large sized rooms.


  • Portable design
  • Compact
  • Lightweight
  • Ideal for those with allergies and asthma
  • Permanent filter
  • Easy cleaning
  • HEPA filter
  • Perfect for medium and large rooms
  • 3 cleaning speeds
  • 3-year warranty


  • Turns off after 12 hours
  • Noisy

The HEPA air purifier reviews for this model are generally favourable, with the only niggle being that it turns itself off after 12 hours and that it can be a little noisy.

With a permanent HEPA filter and three air cleaning speeds, it is sure to make the air in your home cleaner and a lot more breathable than before. Perfect for the bedroom, it is a popular choice.

8.Levoit Air Purifier for Home

Levoit air purifier

This air purifier is compact with a snazzy modern aesthetic that will breathe new life into your home.

It has three stages of filtration, including a carbon filter that is highly effective at capturing smoke and odours.

The filters are also fantastic at trapping pet dander and other common allergens (like dust).

Additionally, there are three fan speeds to suit any level of air quality.

It is free from ozone, which makes it safe for those with asthma as well as children - providing you with nothing but quality air. 

The control panel is located on the top of the machine in the form of a touch panel, and it has an incredibly quiet operation that makes it suited to any room in your home.

It also comes with a nightlight setting as well as a filter change reminder.


  • Advanced filtration system 
  • HEPA and carbon filters 
  • Lightweight and portable 
  • Constant coverage 
  • Suitable for all room sizes 
  • Great warranty 


  • Filter changes are expensive
  • Can be noisy

This is a fantastic model of air purifier and one that is sure to make the air in your home more pleasant to breathe.

The price is more than reasonable when you consider both the power and capabilities of this model.

It’s a compact piece of kit that will slide nicely into any corner of your home or office so that the air can be purified in peace. 

Frequently Asked Questions

Are air purifiers safe and healthy machines to run in my home?

Yes, air purifiers are safe and healthy machines to run in your home.

They shouldn’t cause any adverse health issues and are completely safe to have around people and animals. 

Of course, those with respiratory issues and children should try to avoid the models with ozone filters, but this is very easy to do. 

Do air purifiers give off radiation?

Yes, air purifiers do give off radiation. However, this isn’t something you should be concerned about.

They produce a small and safe amount of EMF (electromagnetic field) radiation, just like your microwave or mobile phone. 

These are harmless quantities and no scientific studies have shown them to be dangerous in any way. 

Should you run your air purifier all the time?

Yes, you should run your air purifier all the time. You cannot run it for a few hours a day and expect the air to be left clean at all times after. 

This machine is working hard to purify the air in your home, and so you should leave it running at all times.

If you are concerned, you can lower the fan speed to keep it ticking over and cleaning while you are out or sleeping. 

How long does it take an air purifier to clean a room?

It takes between 30 minutes and two hours for an air purifier to clean a room. This is largely reliant on the size of the room in question and the number of pollutants in the air. 

However, just because it has finished after this time doesn’t mean you can turn it off.

Pollutants are constantly entering the air in your home and so the air purifier is always working to keep the air clean. 

Where is the best place to put an air purifier in a room?

The best place to put an portable air purifier in a room is near walls, doorways, or even the side of the fridge. This actually enhances its ability to clean the air and cycle clean air back into the room. 

In the bedroom, it should be at least six feet away from the head of your bed, preventing a draught and allowing you to obtain the full benefits of air purification. 

Do air purifiers help sinus problems?

Yes, air purifiers do help sinus problems. Dust, pollen, and other common allergens can cause sinus issues, and an air purifier works by removing these from the air to make it more breathable. 

Combined with eating well and getting exercise every day, an air purifier can massively relieve your sinus issues. 

What are the main differences between cheap and expensive brands?

The main difference between a cheap and expensive brand of air purifier is the purification process and the filtration system.

More costly models will often have an advanced system, and the filters will be HEPA grade, if not HEPA Plus or UV. 

The expensive models are often quieter, have a better filter life, and come with additional features to improve usability.

Of course, spending more does not guarantee an amazing model. Sometimes, the budget ones perform better than high-end ones. Pay attention to the reviews. 

Buyer's Guide

Key Things To Look for 

Before you go and buy your new air purifier, there are a few things that you need to take into consideration.

The information below will help you to make a clearer and more informed choice about the model you pick up and also with regards to what you need in your home.

Coverage Area. How large an area do you need your air purifier to cover? Is it going to sit in a small bedroom, or will you be using it in a large living area? 

Every air purifier has its own set of restrictions with regards to the area in your home that it can cover.

Always check what room size it is suitable for, as well as the square footage where possible.

Filtration Types. The filter is responsible for capturing particles and allergens in the air so that only clean air is pushed back out into the room.
There are several types of filter available for air purifiers, the most popular of which is the HEPA filter. 

These filters are capable of capturing particles as small as 0.03 microns, which means that pretty much every allergen is covered.

They are the best and most effective filter. You will often find them combined with carbon filters. 

These are especially useful for odour removal, and they are brilliant if you are a smoker.

They are effective with pretty much any organic compound, making them a perfect partner for HEPA filters. UV lights are also becoming a popular type of filter. 

Filter Life. You want your filter to last a little while before it needs to be replaced. However, this will also depend on how much grime is in the air and needs to be captured. 

On average, a filter can last anywhere from six months to a year, but there have been extreme cases where it has needed to be changed after a month when brought into a new home. 

The best thing to do with filters is to buy a good quality one that will last you at least six months.

Following this, it should be checked monthly just to see how clean it is and so that you can roughly guess how much longer it will last. 

Particle Removal Capacity. You want your air purifier to be able to remove as many particles from the air as possible.
Now, these particles come in a range of sizes and not all filters are equipped to handle the small ones. 

This is why the HEPA filter is such a good choice, and it is able to capture particles as small as 0.03 microns.

What this means is that it can capture 99.97% of all particles in the air. That’s an impressively high number, and also the reason why people don’t usually pick anything other than HEPA. 

Portable & Ease of Use. If you have a big bulky air purifier then it’s going to be difficult to move around or swap rooms. 

Pick an air purifier that’s lightweight and easy to move, but also one that has simple controls so that you can just switch it on and leave it to do its thing.

The last thing you want is to be stuck with a machine that is not only confusing but also impossible to move. 

Noise Levels. Air purifiers can be incredibly noisy, and you want something that hums quietly in the background so that you barely notice it. 

This is especially true if the purifier is located in your bedroom. Pick something that has a low decibel reading.

25dB tends to be near-silent, and anything that goes above 50-60dB you will not be able to sleep near. 

Warranty. You want your air purifier to be covered in case anything happens to it, and most manufacturers will supply you with one that lasts at least one year after purchase.
Many will allow you to extend this to five years if you register it online. 

Check that it covers things like malfunctions and repairs, and also that parts and labour are included in the terms of the warranty.

You can also look out for a guarantee, but this isn’t as extensive and cannot be extended as a warranty can.

To Conclude

A HEPA air purifier is great for those who need something powerful to clear odours and pollutants from the air.

With a great range of brands and models available to choose from, you are sure to find something here that is perfectly suited to your home.

Whether you need a large model to clear your room, or something a little smaller and more compact, there is an option here for you.

With these reviews, the decision making process should be that much easier and you are sure to find the best HEPA air purifier for allergies.

What did you think of our HEPA air purifier selection? Are there any you would have added to the list? We’d love to hear from you in the comments below.

Last Updated on April 14, 2021 by Gemma Tyler

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