BreatheBetterDelhi NCRTools

घर में साफ़ हवा

Cleaner air for the people you love, all winter long

Simple, evidence-based steps for homes in Delhi NCR, from protecting a grandparent’s bedroom to choosing a mask that really fits.

Make our family planWhere do I start?

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A closed bedroom: hazy air outside the window, a purifier running, and clean air around a person sleeping
Window sealed · gaps closedPurifier on · sized for the roomDoor shut at night

Three things that matter most

Start here. Everything else on the site builds on these.

  1. One clean room

    Start where the most sensitive person sleeps. Close it up and run a HEPA purifier sized for that room. How to

  2. No smoke inside

    Pause the incense, dhoop and mosquito coils this season. Run the exhaust when cooking. Why

  3. A mask that seals

    A certified N95 or FFP2 with head straps. Check the fit every time you go out. Choose one

Caring for Dadi, Nana, or a newborn?

Daily routines, warning signs and doctor-first advice for the family members who feel bad air the most.

Get help now

112

Chest pain, struggling to breathe, blue lips, fainting or sudden confusion. Ambulance: 102 (Delhi). Ambulance: 108 (Gurugram, Faridabad (Haryana); Noida, Ghaziabad (UP)).

See it for yourself

Move the sliders to match your room and watch what sealing and a purifier do.

Interactive

Clean-room simulator

See how sealing gaps, closing the door and running a purifier change the air inside one room. This is an educational model, not a forecast.

How airtight is the room?
Indoor PM2.5 falls from 167 to about 21 µg/m³ over 60 min after the purifier starts; outdoor is 250.068135203270purifier on15 min30 min45 min60 minOutdoor 250WHO 24-h guideline 15
Indoor PM2.5 settles at about
21 µg/m³
92% below outdoor, within about 14 minutes. Purifier provides 8.4 clean-air changes per hour.

What each step adds (door closed)

  • Leaky room, no purifier227 µg/m³
  • Sealed room, no purifier105 µg/m³
  • Leaky room + 300 m³/h purifier47 µg/m³
  • Sealed room + 300 m³/h purifier6 µg/m³

Bars show indoor PM2.5 as a share of the outdoor level (250 µg/m³).

Assumptions

Single well-mixed room with a 9 ft ceiling. Particles settle on surfaces at 0.2/h. Air leaks in at:

  • Leaky (gaps under doors, old window frames): 2 air changes/h, 100% of outdoor particles get through
  • Average (windows shut): 1 air changes/h, 80% of outdoor particles get through
  • Sealed (weatherstripped, door sweep): 0.3 air changes/h, 70% of outdoor particles get through
  • Windows open: 8 air changes/h, 100% of outdoor particles get through

These values are illustrative: there are no published air-leakage measurements for Delhi homes. The purifier is assumed to deliver its rated CADR, and it delivers less at lower fan speeds. Use an indoor PM2.5 monitor to check your own room.

Find what you need

Understand the airPM2.5, AQI scales, Delhi’s pollution seasons and GRAP, explained plainly.Protect your homeBuild a clean room: purifiers, sealing, ventilation, indoor sources and monitoring.Going outsideMasks that work, commutes, school runs and exercise on bad-air days.Caring for sensitive peopleOlder adults, babies and children, pregnancy, and heart or lung conditions.Buying by specWhat numbers and certifications to look for. No brands, no affiliate links.Myths and evidencePlants, ionisers, salt lamps, home remedies: what the evidence says.Calculators and checklistsSize a purifier, read any AQI number, check a mask fit, plan your day.
How’s the air near you today? Check the closest official station and its time.
CPCB dashboardSAMEER appDelhi AQI portalConfused by the numbers?