Best Overall
#1
Best overall value - powerful, quiet purification for larger homes.
10 Best Air Purifiers Under 100 of 2026
Best Budget
#2
Best budget pick for basic HEPA plus UV cleaning in small rooms.
Best 2-in-1
#3
Best for bedrooms needing both humidification and air purification.
Best Smart
#4
Best for smart-home users and allergy sufferers in bedrooms.
#5
Best for style-conscious users wanting quiet, efficient purification.
#6
8.8
Best for noise-sensitive sleepers wanting virtually silent air purification.
Best Overall
#7
8.6
Best for very large rooms needing fast, app-controlled filtration.
Buying Guide
Filter type and efficiency
Look for a purifier with a true HEPA filter (often labelled H13 or H14) rather than 'HEPA-style' or 'HEPA-like' - true HEPA captures the vast majority of fine particles such as pollen, pet dander and many soot particles. Some budget models also include an activated carbon layer for gases and odours; if you have pets or live near busy roads, that matters.
Room size and CADR
Check the manufacturer's recommended room coverage or the CADR (clean air delivery rate) so the unit is appropriate for your room - many budget purifiers are best for small to medium rooms (bedrooms, offices). A purifier that’s too small will barely move the air and won’t be effective, even if it has a good filter.
Noise level and night use
Under-£100 models can be very quiet or noticeably noisy depending on fan speed; look for a low decibel rating or a dedicated 'sleep' mode if you’ll use it overnight. Bear in mind higher speeds give faster cleaning but increase noise.
Running costs (filters & energy)
Upfront price is only part of the cost - replacement filters and how often they need changing can add up over a year. Also consider power consumption and whether the unit has an eco or auto mode to cut bills.
Features, controls and build quality
Decide which extras are worth it: air-quality sensors and auto mode, timer, multiple speeds, a night light or smartphone app. Simpler controls and solid build often beat gimmicks on very cheap models - durability matters when you’ll rely on it daily.
Frequently Asked Questions
What is the best air purifier under £100 in 2026?
There isn’t a single best model for everyone, but budget favourites that frequently perform well under £100 include compact true-HEPA units like the Levoit Core 300 (older variants) and Xiaomi Mi Air Purifier 3H when on sale. Choose based on room size, noise preference and whether you need activated carbon for smells.
Is an air purifier worth buying in the UK?
Yes for specific needs: they help reduce indoor allergens, pet hair, dust and some fine particles from traffic or wood smoke, which is useful in many UK homes. They’re less useful for gases or very large rooms unless you pick the right model and place it correctly.
Which air purifier under £100 offers the best value for money?
Value tends to come from a balance of true-HEPA filtration, suitable room coverage and low running costs; models like the Levoit Core 300 are widely regarded as good value because they combine a true-HEPA filter with quiet operation and modest filter replacement intervals. Watch for seasonal sales at Amazon UK, Argos or Currys to get the best deals.
Levoit vs Xiaomi - which should I buy under £100?
Levoit models often prioritise quietness and simplicity (good for bedrooms), while Xiaomi models usually offer stronger app features and slightly higher airflow for the size. If you want straightforward, quiet operation pick Levoit; if you want smart control and a bit more power, Xiaomi can be the better fit when it’s within budget.
Can air purifiers protect me from viruses like COVID-19?
Air purifiers with true-HEPA filters can reduce airborne particles and therefore lower the concentration of virus-laden aerosols, but they are not a guaranteed protection on their own. For best protection combine ventilation, distancing and masks where appropriate - purifiers are a supplement, not a replacement.
How often do I need to change filters on budget purifiers?
Most manufacturers recommend changing main HEPA filters every 6–12 months depending on use and pollution levels; pre-filters may be washable or require more frequent replacement. Check the model’s guidance and factor filter cost into the total ownership expense.
Where can I buy reliable budget air purifiers in the UK?
Popular retailers include Amazon UK, Argos, Currys and John Lewis - also look for official brand stores for warranty support. Compare prices and check filter availability for your chosen model before buying.
What is the best air purifier for bedrooms under £100 in 2026?
For bedrooms under £100, choose a compact true-HEPA unit with a quiet sleep mode and coverage for small to medium rooms; for example, models like the Levoit Core 300 are favoured because they combine a true HEPA filter, a low-noise sleep setting and compact footprint, making them suitable for night-time use.
Is buying an air purifier under £100 worth it in 2026?
Yes for targeted use: an under-£100 purifier with a true-HEPA filter is worth it if you need to reduce allergens, pet dander or fine particles in a single room. They’re not a substitute for whole-house ventilation but are effective, lower-cost solutions for bedrooms and home offices.
Levoit Core 300 vs Xiaomi Mi Air Purifier 3H - which should I buy under £100?
Choose Levoit Core 300 if you prioritise quieter operation and simple controls for bedroom use (true HEPA, compact and quiet); pick Xiaomi Mi 3H if you want stronger airflow and app-based controls, provided it’s available within your budget and you’re comfortable with the Xiaomi app ecosystem.
Which air purifier under £100 is best value for money in the UK?
Best value typically combines true-HEPA filtration, reasonable room coverage and low ongoing filter costs - models like the Levoit Core 300 often hit that sweet spot in the UK market, offering dependable HEPA filtration, modest replacement filter prices and a quiet operation suited to daily use.
Product Selection: Products are sourced via Amazon's Product Advertising API based on relevance, availability, and customer ratings.
Review Analysis: We use AI to analyze customer review trends, identify common themes, and summarize the key strengths and weaknesses of each product.
Scoring Independence: Our rankings and fit scores are generated algorithmically and are not influenced by commission rates or advertising relationships.
Affiliate Disclosure: We earn commissions from qualifying Amazon purchases made through our links at no additional cost to you.
Last updated: June 5, 2026
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