Best Air Purifier Under £100 UK 2026 — Top Picks That Actually Work
Last updated: 3 June 2026
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The best air purifier under £100 UK buyers can actually trust is a surprisingly short list — and that is the honest starting point for this guide. The sub-£100 market is flooded with models using misleading ‘HEPA-type’ filters, inflated coverage claims, and cheap components that saturate within weeks. But within that budget there are genuine standouts that deliver True HEPA H13 filtration, effective auto modes, and reliable long-term performance. This guide tells you exactly which ones are worth your money — and what to avoid.
Indoor air quality matters more than most people realise. According to Asthma + Lung UK, indoor air can be up to five times more polluted than outdoor air — and common triggers including dust mite allergens, mould spores, pollen, and pet dander are present in virtually every UK home. A good air purifier running consistently is one of the most evidence-based steps you can take to reduce that exposure, and you do not need to spend £300 to get meaningful results.
| Quick Picks — Best Air Purifier Under £100 UK 🥇 Best overall: Levoit Core 300S 🥈 Best budget: Levoit Core 300 🥉 Best for larger rooms: Coway AP-1512HH |
| ✅ Key Takeaways • True HEPA H13 is non-negotiable — ‘HEPA-type’ and ‘HEPA-style’ filters are not the same standard. Any sub-£100 purifier that doesn’t explicitly state True HEPA H13 should be avoided.• The Levoit Core 300S is the best overall pick — True HEPA H13, 24 dB sleep mode, 26W, ozone-free, with app control and auto mode for under £100.• The Levoit Core 300 delivers the same filtration and 24 dB sleep mode without smart features — the right choice if simplicity or budget is the priority.• The Coway AP-1512HH covers up to 36m² — nearly double the Levoit Core models. Switch the ioniser off immediately and leave it off.• Under £100 is well suited to a standard UK bedroom or home office (15–20m²) For larger rooms above 25m², step up to the Levoit Core 400S.• Levoit filter replacements cost ~£20–25/year at 6–8 month intervals — one of the lowest running cost structures in the category. |
What to Look for in an Air Purifier Under £100
True HEPA H13 — not ‘HEPA-type’ or ‘HEPA-style’
This is the single most important filter specification to check. True HEPA H13 captures 99.97% of airborne particles down to 0.3 microns — including dust mite allergens, mould spores, pollen, and fine particulate matter. ‘HEPA-type’ and ‘HEPA-style’ filters are not the same standard and can perform dramatically worse. Any sub-£100 purifier that does not explicitly state True HEPA H13 should be avoided regardless of price or marketing claims.
Published CADR — match it to your room size
CADR (Clean Air Delivery Rate) measures how quickly a purifier delivers clean air in a given volume. A unit rated for 18m² will struggle in a 25m² room regardless of how long it runs. At sub-£100 prices, expect effective coverage of 15–20m² — typically well suited to a UK bedroom, home office, or smaller living room. For more on calculating the right CADR for your space, see our guide to what CADR rating do I need.
Avoid ionisers if possible
| ⚠️ Ioniser warning: Many budget purifiers include ionisers as a selling point. Ionisers produce small amounts of ozone as a by-product, which can irritate airways — particularly in households with children, asthma sufferers, or anyone with respiratory sensitivity. The Levoit Core 300S and Levoit Core 300 produce no ozone at all — no ioniser, no UV-C. The Coway AP-1512HH includes an ioniser that must be switched off manually. Always switch it off before use and leave it off. |
Running costs — factor in filter replacements
A £60 purifier with £40-per-year filter costs is not necessarily cheaper than an £85 purifier with £25-per-year filters over two years. Levoit replacement filters for the Core 300S and Core 300 typically cost £20–25 per year at 6–8 month replacement intervals — one of the most cost-effective running cost structures in the category.
Best Air Purifier Under £100 UK — Reviews
🥇 Levoit Core 300S — Best Overall Under £100
| Coverage | Up to 18m² — ideal for standard UK bedrooms and home offices |
| CADR | 141 m³/h — cleans a small room quickly and efficiently |
| Filtration | True HEPA H13 + activated carbon — confirmed ozone-free, no ioniser |
| Noise | 24 dB on sleep mode — genuinely inaudible at the bedside |
| Power draw | 26W — significantly more efficient than the non-smart Core 300 (45W) |
| Smart | VeSync app, Alexa and Google Home compatible, auto scheduling |
| Auto mode | Yes — real air quality sensor drives responsive auto mode |
| Display | Screen can be fully switched off for undisturbed sleep |
| Filter cost | ~£20–25/year at 6–8 month replacement intervals |
The Levoit Core 300S is the standout pick in the sub-£100 bracket and has been the UK’s best-selling compact air purifier on Amazon for good reason. It delivers genuine True HEPA H13 filtration, a real air quality sensor with responsive auto mode, smart app control, and a 24 dB sleep mode — all without an ioniser, making it completely ozone-free. At under £100 it represents exceptional value.
The 26W motor is significantly more efficient than the non-smart Core 300‘s 45W, which matters over months of daily use. The display can be fully switched off for undisturbed sleep, and multiple specialist filter variants are available — pet, mould, and toxin absorber — using the same fitting.
Pros:
- Completely ozone-free — safe for bedrooms, nurseries, and allergy sufferers
- 24 dB sleep mode — quieter than a whisper and genuinely usable overnight
- App and Alexa control — adjust settings without entering the room
- Real air quality sensor drives responsive auto mode
- 26W — significantly more energy-efficient than the Core 300 (45W)
- Multiple specialist filter options — pet, mould, toxin absorber
Cons:
- Coverage limited to 18m² — not suited to larger living rooms or open-plan spaces
- No onboard display for real-time air quality — relies on app
- Filter replacement every 6–8 months — set a reminder
| Verdict: The Levoit Core 300S is the model we would recommend to almost any first-time buyer in the UK looking for a bedroom or home office air purifier. Ozone-free, whisper-quiet, smart, and efficient — it does everything that matters for under £100. |
View the Levoit Core 300S on Amazon →
🥈 Levoit Core 300 — Best Budget Pick
| Coverage | Up to 18m² |
| CADR | 141 m³/h |
| Filtration | True HEPA H13 + activated carbon — no ioniser, no ozone |
| Noise | 24 dB on sleep mode |
| Power draw | 45W — less efficient than the Core 300S (26W) |
| Controls | Physical touch panel only — no app or voice control |
| Auto mode | No — runs at set speed only |
| Filter cost | ~£20–25/year — same replacement filters as the 300S |
If the Levoit Core 300S sits slightly above your budget or you simply do not need smart features, the Levoit Core 300 is the natural alternative. It shares the same True HEPA H13 filtration, the same compact cylindrical form factor, and the same 24 dB sleep mode — without the app connectivity, air quality sensor, or auto mode. It is a straightforward, reliable, ozone-free purifier at the lowest price point in the Levoit Core range.
The main practical difference is that you must physically adjust the Core 300 — there is no way to schedule it, check air quality remotely, or switch it on from bed. For a buyer who is happy to set it manually before sleep and is not bothered about smart features, it is a genuine bargain.
Pros:
- Lowest price in the Levoit Core range — excellent entry point
- Same ozone-free True HEPA H13 filtration as the 300S
- Same 24 dB sleep mode — genuinely quiet overnight
- Simple touch controls — nothing to set up or configure
- Same specialist filter options and replacements as the 300S
Cons:
- No app control — must physically adjust the unit; cannot schedule or monitor remotely
- No air quality sensor or auto mode — runs at a fixed speed only
- 45W motor draws more power than the Core 300S (26W) over equivalent run time
| Verdict: The Levoit Core 300 is ideal for buyers who want honest, reliable air purification without complexity. If you are happy to adjust it manually and don’t need scheduling or auto mode, it is a genuine bargain. For bedroom convenience overnight, the step up to the Core 300S is worth it. |
View the Levoit Core 300 on Amazon →
🥉 Coway AP-1512HH — Best for Larger Rooms
| ⚠️ Ioniser warning: The Coway AP-1512HH includes an ioniser that is on by default. Switch it off immediately on setup and leave it off — the four-stage HEPA and carbon filtration performs the air cleaning without it. Running the ioniser produces ozone, which can irritate airways, particularly for asthma sufferers and children. |
| Coverage | Up to 36m² — nearly double the Levoit Core models |
| CADR | 230 m³/h (dust) — strong for its size and price |
| Filtration | 4-stage: pre-filter, activated carbon, True HEPA, ioniser (switchable off) |
| Eco mode | Fan powers down automatically when air quality is clean — saves energy |
| Ioniser | Present — switch off immediately and leave off |
| Smart | No app or voice control |
| Filter cost | Slightly higher than Levoit equivalents |
The Coway AP-1512HH sits at or just below the £100 mark and covers a larger area than the Levoit Core models — up to 36m² versus 18m². If your room is bigger than a standard UK double bedroom, or you want one unit to handle a larger living space, the Coway is the stronger choice at this price point. Its eco mode powers the fan down automatically when air quality is clean, which helps manage running costs over long periods.
With the ioniser switched off, the Coway AP-1512HH‘s four-stage filtration — pre-filter, activated carbon, True HEPA, and a particle capture stage — delivers genuinely strong performance. It is a well-established model with a long track record and one of the strongest coverage-to-price ratios in the under-£100 bracket.
Pros:
- Covers up to 36m² — best room coverage in the under-£100 bracket
- 230 m³/h CADR — strong for its size and price
- Four-stage filtration including dedicated carbon deodorisation layer
- Eco mode reduces running costs when air quality is already good
- Well-established model with a long track record and strong user reviews
Cons:
- Ioniser is on by default — must be switched off manually on setup; no auto-off
- No app control or smart features
- Bulkier than the compact Levoit Core models
- Replacement filters cost slightly more than Levoit equivalents
| Verdict: The Coway AP-1512HH is the right choice when your room is larger than 18m². Switch the ioniser off as the very first step and leave it off — the four-stage HEPA and carbon filtration does the work without it. |
View the Coway AP-1512HH on Amazon →
Quick Comparison: Best Air Purifiers Under £100 UK
| Feature | Levoit Core 300S | Levoit Core 300 | Coway AP-1512HH |
| Coverage | Up to 18m² | Up to 18m² | Up to 36m² |
| CADR | 141 m³/h | 141 m³/h | 230 m³/h (dust) |
| Filtration | True HEPA H13 | True HEPA H13 | True HEPA + 4-stage |
| Ozone-free? | Yes — no ioniser | Yes — no ioniser | Yes — with ioniser off |
| Sleep noise | 24 dB | 24 dB | Not rated as low |
| Smart / app | Yes — VeSync/Alexa | No | No |
| Auto mode | Yes — air quality sensor | No | Yes — Eco mode |
| Power draw | 26W | 45W | Not published |
| Filter cost | ~£20–25/year | ~£20–25/year | Slightly higher |
| Best for | Bedrooms, nurseries | Budget / simple | Larger rooms 20–36m² |
What You Will and Won’t Get Under £100
| ✅ What you GET under £100 | ❌ What you DON’T get under £100 |
| True HEPA H13 filtration — same standard as purifiers costing 3× as much | Coverage for large rooms above 25–30m² |
| Effective coverage for standard UK bedroom sizes (15–20m²) | High CADR for very fast air changes in a large open-plan space |
| Near-silent overnight operation — 24 dB on the Levoit Core models | Premium build quality and materials |
| Smart features on the Core 300S — auto mode, scheduling, app and Alexa control | Onboard air quality display without needing the app |
| Low running costs — Levoit filters at ~£20–25/year | Multiple filter layers for heavy pollution (smoke, VOCs at scale) |
| Honest summary: Under £100 you can get genuine True HEPA H13 filtration, a quiet sleep mode, and — with the Core 300S — smart app control and auto mode. What you won’t get is the coverage area, CADR, or premium build of a £200+ unit. For a standard UK bedroom or home office, that is absolutely fine. For a large open-plan kitchen-diner or living room above 30m², you need to step up. |
When to Spend More: The Natural Upgrade Path
If you find the Levoit Core 300S or Levoit Core 300 is not keeping up with your space — perhaps the room is larger than 18m², or you want faster air changes for allergy management — the natural next step is the Levoit Core 400S. It covers up to 41m², delivers a CADR of 260 m³/h, and uses the same VeSync app ecosystem. The upgrade path is intentional and works well:
Levoit Core 300 → Levoit Core 300S → Levoit Core 400S — same app, same filter ecosystem, increasing room coverage and CADR as needed.
Frequently Asked Questions
Is it worth buying an air purifier under £100?
Yes — provided you choose the right model. The Levoit Core 300S and Levoit Core 300 both deliver True HEPA H13 filtration that captures 99.97% of airborne particles down to 0.3 microns — the same standard as purifiers costing £300+. For a standard UK bedroom, the under-£100 market offers genuinely excellent value. Avoid models using ‘HEPA-type’ or ‘HEPA-style’ filters — these are not the same standard and perform significantly worse.
What is the best air purifier under £100 for a bedroom?
The Levoit Core 300S is our top pick for bedrooms. At 24 dB on sleep mode it is genuinely inaudible at the bedside, it is completely ozone-free, and its app control means you can adjust settings from bed without disturbing sleep. For those who don’t need smart features, the Levoit Core 300 delivers the same filtration and sleep mode at a lower price.
How long do air purifier filters last under £100?
Most True HEPA H13 filters in sub-£100 purifiers need replacing every 6–8 months, depending on air quality and daily run time. Levoit replacement filters cost approximately £20–25 per year, making the total running cost very manageable. Never wash a HEPA filter — this damages the fibres and reduces filtration efficiency. Replace it on schedule.
Can a sub-£100 air purifier handle a living room?
It depends on the size. The Levoit Core 300S and Levoit Core 300 are rated up to 18m² — suitable for a smaller UK living room or second reception room. The Coway AP-1512HH at up to 36m² handles a larger living room more effectively. For a large open-plan space above 35m², you will need to step up beyond the £100 budget — the Levoit Core 400S covers up to 41m² and is the natural next step.
Are budget air purifiers safe to run overnight?
Yes — the models recommended on this page are all safe for overnight operation. The Levoit Core 300S and Levoit Core 300 produce no ozone whatsoever — no ioniser, no UV-C, no plasma generator. They are among the safest air purifiers for bedroom and nursery use at any price point. The Coway AP-1512HH is also safe overnight with the ioniser switched off.
Should I get the Levoit Core 300 or Core 300S?
If your budget stretches to the Core 300S, it is the better buy for most people. The improvements are meaningful: a more efficient 26W motor (vs 45W), an air quality sensor enabling auto mode, and app control so you can adjust it remotely without entering the room. Over two years, the energy savings and convenience typically outweigh the small price difference. If budget is the deciding factor, the Core 300 delivers the same core filtration without the extras.
The Verdict
The best air purifier under £100 in the UK in 2026 is the Levoit Core 300S — ozone-free True HEPA H13 filtration, a 24 dB sleep mode, 26W efficient motor, smart app control, and auto mode, all for under £100. It is genuinely hard to fault for a standard UK bedroom or home office. For a no-frills budget option with the same core filtration, the Levoit Core 300 delivers excellent value. For larger rooms approaching 30–36m², the Coway AP-1512HH is the pick — switch the ioniser off immediately and leave it off.
If your space is larger than 18–20m² and you want the best performance the Levoit ecosystem offers, the Levoit Core 400S is the natural step up — 260 m³/h CADR, 41m² coverage, and the same VeSync app — at a modest premium above this budget.
Related Reading
Best Air Purifier for a Bedroom UK
Coway vs Levoit Air Purifier UK
| About This Article This article was written by Mark, editor of UK Air Quality. Product specifications were sourced from manufacturer documentation and cross-referenced against independent reviews. CADR, noise, and wattage figures for the Levoit Core 300S (141 m³/h, 24 dB, 26W), Levoit Core 300 (141 m³/h, 24 dB, 45W), and Coway AP-1512HH (230 m³/h CADR) reflect published technical data. Affiliate links are used throughout; we may earn a commission if you buy through them at no extra cost to you. External sources: Asthma + Lung UK — Indoor Air Quality | NHS — Damp and Mould |
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