Do air purifiers help with hay fever?

They can help indoors. A HEPA purifier traps pollen that drifts in through windows and on clothes, so running one in the bedroom with the window closed can mean fewer symptoms at night. In Ireland, tree pollen peaks in spring and grass pollen from June into July. A purifier will not help outdoors, so keep up your usual treatment and check Met Éireann’s pollen forecast.

Will an air purifier help with damp or mould?

Only partly. A purifier can capture airborne mould spores, but it does not remove moisture, so condensation and mould growth carry on. Damp needs a dehumidifier, better ventilation and fixing any leaks. If you have both damp and allergy problems, a dehumidifier with a built-in HEPA filter, such as the Meaco Arete One, handles both in one appliance.

What size air purifier do I need?

Multiply the room’s floor area by its ceiling height, then by about five for allergy relief. A 12 m² bedroom with a 2.4 m ceiling holds about 29 m³, so you would want a CADR of roughly 145 m³/h. Room sizes quoted in listings often assume fewer air changes, so compare CADR figures rather than the headline room size.

How much does it cost to run an air purifier in Ireland?

Very little in electricity. At around 32c per kWh, a 25 W purifier costs under 1c an hour, or about 19c a day running flat out around the clock, and a 6–7 W desktop unit about 5c a day. The bigger cost is replacement filters, typically every six to eight months for Levoit models, so check the current filter price before buying.

How often should I replace an air purifier filter?

Follow the manufacturer’s interval and the filter indicator. Levoit suggests six to eight months for the Core 300S, and Meaco about three months on the Arete One for the cleanest air. Homes with pets, smokers or a stove, or purifiers running 24 hours a day, need changes sooner. Cleaning the washable pre-filter regularly helps the main filter last.

Is H13 better than True HEPA?

They are different labels rather than better or worse. H13 is a European grade under EN 1822, meaning at least 99.95% capture at the hardest-to-trap particle size. True HEPA is a US-style term, usually 99.97% at 0.3 microns. Both are very fine filters. In practice, CADR, a good seal around the filter and regular replacement matter more than the label.

Best Air Purifiers for Irish Homes (2026)

What an air purifier can and cannot do

An air purifier pulls room air through a fine filter and traps what is floating in it: pollen, house dust, pet dander, mould spores and fine smoke particles. Run in the room you spend most time in, usually the bedroom, it can make a real difference in hay fever season or in a home with pets. What it does not do is remove moisture, so it will not stop condensation or the black mould that comes with it. That is a dehumidifier’s job.

There is an Irish angle too. The EPA’s air monitoring identifies fine particulate matter (PM2.5), mainly from burning solid fuel in homes, as one of the two main threats to air quality in Ireland, with poor-air episodes most common in cold, still weather from late autumn to early spring. If you live where many houses burn solid fuel, or you have a stove yourself, a HEPA purifier can reduce the level of those fine particles indoors.

The one relevant product in our catalog is a dehumidifier with a built-in H13 HEPA filter, so the dedicated purifiers below link to Amazon.ie search results.

Our pick and the alternatives

Best if you also have damp

Meaco Arete One 20L Dehumidifier and Medical-Grade H13 HEPA Air Purifier (Low Energy)

Best for: Damp homes where dust, mould spores or pet allergens are also a problem

If your home has condensation as well as dust or allergy problems, one machine can tackle both. The MeacoDry Arete One 20L is a compressor dehumidifier first, but the air it treats passes through a medical-grade H13 HEPA filter, and Meaco says it can be used as a stand-alone air purifier in spring and summer when damp is less of an issue. Meaco quotes 38–40 dB and airflow of around 145–160 m³/h. Meaco does not publish a CADR, so it is not a like-for-like substitute for a dedicated purifier, but in a damp Irish house it saves buying two appliances.

Pros

Removes moisture and filters airborne particles in one appliance
H13 HEPA filter, the grade most dedicated purifiers aim for
Quiet for a dehumidifier, with a night mode
Laundry mode for drying clothes indoors

Cons

No published CADR, which makes comparison with dedicated purifiers difficult
Much bigger and heavier than a bedroom purifier, and draws around 180–225 W when dehumidifying
Meaco suggests replacing the HEPA filter roughly every three months for the cleanest air, so check the current filter price

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Dedicated air purifiers worth considering

Links open an Amazon.ie search filtered to items sold & dispatched by Amazon.ie. Availability changes.

Levoit Core 300S
A compact cylindrical purifier with a three-stage filter (pre-filter, HEPA and activated carbon), a CADR listed at around 240 m³/h in European listings, a laser air-quality sensor with an auto mode, and VeSync app control over 2.4 GHz Wi-Fi. It suits a bedroom or a small living room. Downside: the top fan speed is loud enough to be distracting at night, so you will mostly run it on auto or sleep, and filters are a recurring cost (check the current filter price).
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Levoit Core Mini
A small, low-power purifier (around 7 W) for a desk, bedside table or nursery shelf, with an aroma pad for essential oils. It suits close-range use in a small bedroom or home office. Downside: its CADR, quoted at roughly 58–78 m³/h depending on the market, is too low to clean a full-size room quickly, and the filter grade differs between regional versions, so check the listing.
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Levoit LV-H128
A desktop purifier of similar size and power to the Core Mini (around 6 W), with a three-stage HEPA filter, an aroma pad and a quiet sleep mode with the display switched off. Levoit’s manual gives an ideal room size of about 15 m². Downside: like any desktop unit it works best at close range rather than across a whole room, and there is no air-quality sensor or app.
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How they compare

From manufacturer and retailer specifications. CADR and power figures vary between regional versions; check the listing.
	Levoit Core 300S	Levoit Core Mini	Levoit LV-H128	Meaco Arete One 20L
Type	Dedicated purifier	Desktop purifier	Desktop purifier	Dehumidifier with H13 HEPA filter
CADR	about 240 m³/h	about 58–78 m³/h	about 50–70 m³/h	Not published (airflow 145–160 m³/h)
Best suited to	Bedroom or small living room	Desk or bedside	Desk, bedside or box room	Damp rooms; whole floor as a dehumidifier
Rated power	about 23–26 W	about 7 W	about 6 W	179–225 W when dehumidifying
Air-quality sensor	Yes	No	No	No (humidistat only)
App control	Yes (Wi-Fi)	No	No	No
Removes moisture	No	No	No	Yes

Buying advice for Irish homes

HEPA grades. Under the European filter standard EN 1822, an H13 filter must capture at least 99.95% of particles at the size that is hardest to trap, and H14 at least 99.995%. “True HEPA” is a US-style term, usually meaning 99.97% at 0.3 microns, rather than an EU grade, and vaguer labels such as “HEPA-type” tell you little. An activated carbon layer helps with cooking and smoke smells but does nothing for particles. Avoid any device sold as an ozone generator: ozone irritates the lungs.

CADR and room size. CADR (clean air delivery rate) is how many cubic metres of filtered air a purifier delivers per hour on its top setting. Multiply your floor area by the ceiling height to get the room volume, then by the number of air changes per hour you want. For allergy relief, a common benchmark is close to five air changes an hour, which is what the US appliance body AHAM’s sizing rule is built on. Room sizes in product listings often assume only one or two air changes, so they can look generous.

CADR needed for about five air changes an hour, assuming a 2.4 m ceiling
Room	Floor area	Volume	CADR needed
Box room or nursery	about 7 m²	about 17 m³	about 85 m³/h
Double bedroom	about 12 m²	about 29 m³	about 145 m³/h
Living room	about 20 m²	about 48 m³	about 240 m³/h
Open-plan kitchen-living area	about 30 m²	about 72 m³	about 360 m³/h

On that basis, a Core 300S has the capacity for a bedroom or a modest living room, while the Core Mini and LV-H128 are close-range desk and bedside units. Buying more CADR than you need and running the purifier on a lower, quieter speed is usually better than running a small unit flat out.

Pollen season. In Ireland, tree pollen such as birch is mostly a spring problem, roughly from late March to May, and grass pollen, the most common hay fever trigger, typically peaks from June into July. Met Éireann publishes pollen forecasts during the season. For the best effect, run the purifier in the bedroom with the window and door closed for a couple of hours before bed, and wash bedding often. A purifier helps indoors only; it will not help when you are out.

Stoves and open fires. A HEPA purifier captures fine smoke particles and a carbon layer reduces the smell, but neither does anything about carbon monoxide. Keep a working CO alarm in any room with a stove or open fire, and treat a purifier as an extra, not a substitute for proper ventilation.

Running costs. Purifiers use little electricity. At around 32c per kWh at the time of writing, a Core 300S drawing about 25 W costs under 1c an hour, or roughly 19c a day if it ran flat out around the clock; in auto mode it spends most of its time on lower speeds. A 6–7 W desktop unit costs about 5c a day running constantly. The Arete One is different: it draws around 216 W when dehumidifying, about 7c an hour, although its compressor switches off once the room reaches its target humidity.

Filter replacement. The filter, not the electricity, is the real running cost. Levoit suggests replacing the Core 300S filter every six to eight months, and Meaco suggests about every three months on the Arete One for the cleanest air; pets, smoke and 24-hour use shorten that. Check the current filter price before you choose a purifier, and favour models whose genuine filters are easy to find. Vacuum or rinse any washable pre-filter every couple of weeks so the main filter lasts longer.

Placement. Put the purifier in the room you use most, keep it clear of walls and curtains as the manual directs, and close the door so it is not trying to clean the whole house. We only link to items sold and dispatched by Amazon.ie, for the reasons in why we only list Amazon.ie stock.