AirPurifier.reviewBest Picks
🇮🇳 India-first clean air guide

Buy the right air purifier before pollution buys your lungs.

AirPurifier.review explains AQI, PM2.5, PM10, HEPA, CADR and filter cost in plain Indian-home language. Built for Delhi smog, Raipur dust, metro apartments, kid bedrooms, elderly care and office cabins.

Start Buying GuideUnderstand AQI
PM2.5Fine particles, deep lung risk
PM10Dust, road, construction particles
CADRThe airflow number that matters
Bedroom AQI
126
Poor
HEPA H13 Filter
₹ filter cost matters

AQI categories for India readers

AQI turns many pollutants into one easy score. Use it like a traffic signal for your lungs: green is easy, yellow is watchful, orange and red need action, purple and dark zones mean stay guarded indoors.

AQI
Health concern
What it means at home
0–50
Good
Air is generally clean. Open windows when outdoor dust is low.
51–100
Moderate
Acceptable for most people. Sensitive people may feel irritation.
101–150
Unhealthy for sensitive groups
Children, elderly people and asthma patients should reduce exposure.
151–200
Unhealthy
Keep purifier running in bedrooms and avoid long outdoor activity.
201–300
Very unhealthy
Health alert. Close windows, use masks outdoors, clean indoor air.
301+
Hazardous
Emergency-level air. Everyone should reduce exposure and stay indoors.

PM2.5 vs PM10: the dust monsters you cannot bargain with

Many people buy purifiers after seeing a high AQI, but the smarter move is understanding what is inside that number.

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PM2.5

Particles 2.5 micrometres or smaller. Smoke, combustion, winter smog and fine dust can push this number up. A purifier with true HEPA is the main filter to look for.

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PM10

Larger inhalable particles, often from road dust, construction, soil and pollen. Pre-filters help capture bigger dust before it chokes the HEPA filter.

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CADR

Clean Air Delivery Rate tells how quickly a purifier can clean a room. For Indian dust, choose slightly higher CADR than the brand’s minimum room-size claim.

PM2.5, PM10 and CADR/CFM quick reference

Use these tables like a clean-air dashboard. AQI tells the overall warning level, PM2.5 and PM10 tell what kind of particles are attacking, and CADR/CFM tells whether the purifier has enough airflow for your room.

PM2.5 level
Category
Meaning for Indian homes
0–30 µg/m³
Good
Clean fine-particle level. Normal ventilation is usually fine if outdoor dust is low.
31–60 µg/m³
Satisfactory
Acceptable, but sensitive people may notice mild throat, eye or breathing irritation.
61–90 µg/m³
Moderate
Children, elderly people and asthma patients should reduce long exposure.
91–120 µg/m³
Poor
Fine particles can enter deep into lungs. Run purifier in bedrooms and work rooms.
121–250 µg/m³
Very Poor
Long exposure can cause breathing discomfort. Keep windows closed and use HEPA filtration.
250+ µg/m³
Severe
High-risk air. Avoid outdoor activity and keep indoor clean-air zones active.
PM10 level
Category
Meaning for Indian homes
0–50 µg/m³
Good
Low coarse-dust level. Suitable for normal daily activity.
51–100 µg/m³
Satisfactory
Usually acceptable. Dust-sensitive people may feel mild irritation.
101–250 µg/m³
Moderate
Road dust, construction dust and pollen may start affecting sensitive people.
251–350 µg/m³
Poor
Dust load is high. Clean floors with wet mopping and keep purifier pre-filter clean.
351–430 µg/m³
Very Poor
Breathing discomfort risk rises. Keep windows closed during traffic or construction hours.
430+ µg/m³
Severe
Very dusty air. Avoid outdoor exposure and maintain an indoor clean-air room.
Room size
Recommended CADR
Best for
Up to 150 sq ft
50–100 CFM
Small bedrooms, bathrooms, closets and compact study rooms.
Up to 300 sq ft
100–200 CFM
Average bedrooms, nurseries, home offices and small clinic cabins.
Up to 450 sq ft
200–300 CFM
Medium living rooms, studio apartments and larger bedrooms.
600+ sq ft
350–450+ CFM
Large open-plan living areas, basements, halls and office spaces.

India air purifier buying checklist

Must-have features

  • True HEPA filter, preferably H13 or equivalent grade.
  • Activated carbon filter for odour, smoke and VOC reduction.
  • CADR matched to bedroom or hall size, not just marketing area.
  • Affordable replacement filters available online in India.
  • Sleep mode below 35 dB for bedroom use.
  • Real PM2.5 display, not only colour lights.

Avoid these traps

  • “HEPA-like” wording without clear filter specification.
  • Huge coverage claims with tiny CADR.
  • Unknown brands with no replacement filter listing.
  • Only ionizer-based cleaning for pollution-heavy cities.
  • Buying one purifier for the full house instead of room-level use.
  • Ignoring yearly filter cost. Cheap machine, costly filters: classic wallet smoke.

Room CADR helper

Pollution level

Suggested CADR

338 m³/hr+

Rule of thumb for quick shortlisting, not medical advice.

Affiliate-ready recommendation block

Add your Amazon, Flipkart or brand affiliate links here. Keep recommendations honest: best for bedroom, best for Delhi NCR, best budget, best for large hall, best low filter cost.

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Best for Bedroom

CADR 250–350 m³/hr, quiet sleep mode, reliable PM2.5 sensor, low light pollution.

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Best for Delhi NCR

Higher CADR, strong HEPA, carbon layer and cheaper filter replacements for long winter use.

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Best for Kids Room

Quiet operation, safe design, no ozone claims, child lock and filter-change indicator.

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City pages to capture India search traffic

Create pages like “Best air purifier for Delhi pollution” and “Raipur AQI guide”. Each page can include live AQI embeds, purifier picks and local pollution causes.

Delhi NCRMumbaiBangaloreRaipurKolkataPuneHyderabadAhmedabad

Better article plan than generic AQI sites

AQI sites rank with live city pages, pollutant guides and seasonal pollution blogs. AirPurifier.review should go one step further: explain the problem, then help the reader buy correctly.

Maintenance

Air purifier filter replacement cost in India: brand-wise guide

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