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PM2.5 and fine particles

The pollutant that matters most indoors.

106 answers

What is PM2.5?+

Particles under 2.5 microns — small enough to reach deep into the lungs and pass into the bloodstream.

Where does indoor PM2.5 come from?+

Outdoor air leaking in, cooking, incense, candles, smoking and unswept dust.

What level is safe?+

WHO guidance is very low — under 15 µg/m³ over 24 hours. Lower is always better.

Can I feel PM2.5?+

Rarely. It's usually invisible and odourless, which is why a sensor and a filter matter.

How much does PM2.5 drop in a small bedroom?+

In a small bedroom with doors closed and the unit correctly sized, most households see a large drop within half an hour of running a high speed.

How much does PM2.5 drop in a master bedroom?+

In a master bedroom with doors closed and the unit correctly sized, most households see a large drop within half an hour of running a high speed.

How much does PM2.5 drop in a nursery?+

In a nursery with doors closed and the unit correctly sized, most households see a large drop within half an hour of running a high speed.

How much does PM2.5 drop in a kids' room?+

In a kids' room with doors closed and the unit correctly sized, most households see a large drop within half an hour of running a high speed.

How much does PM2.5 drop in a study?+

In a study with doors closed and the unit correctly sized, most households see a large drop within half an hour of running a high speed.

How much does PM2.5 drop in a home office?+

In a home office with doors closed and the unit correctly sized, most households see a large drop within half an hour of running a high speed.

How much does PM2.5 drop in a living room?+

In a living room with doors closed and the unit correctly sized, most households see a large drop within half an hour of running a high speed.

How much does PM2.5 drop in a studio apartment?+

In a studio apartment with doors closed and the unit correctly sized, most households see a large drop within half an hour of running a high speed.

How much does PM2.5 drop in a 1BHK hall?+

In a 1BHK hall with doors closed and the unit correctly sized, most households see a large drop within half an hour of running a high speed.

How much does PM2.5 drop in a guest room?+

In a guest room with doors closed and the unit correctly sized, most households see a large drop within half an hour of running a high speed.

How much does PM2.5 drop in a rented PG room?+

In a rented PG room with doors closed and the unit correctly sized, most households see a large drop within half an hour of running a high speed.

How much does PM2.5 drop in a hostel room?+

In a hostel room with doors closed and the unit correctly sized, most households see a large drop within half an hour of running a high speed.

How much does PM2.5 drop in a shared flat room?+

In a shared flat room with doors closed and the unit correctly sized, most households see a large drop within half an hour of running a high speed.

How much does PM2.5 drop in a sick room?+

In a sick room with doors closed and the unit correctly sized, most households see a large drop within half an hour of running a high speed.

How much does PM2.5 drop in a work-from-home cabin?+

In a work-from-home cabin with doors closed and the unit correctly sized, most households see a large drop within half an hour of running a high speed.

How much does PM2.5 drop in a reading nook?+

In a reading nook with doors closed and the unit correctly sized, most households see a large drop within half an hour of running a high speed.

How much does PM2.5 drop in a home gym?+

In a home gym with doors closed and the unit correctly sized, most households see a large drop within half an hour of running a high speed.

How much does PM2.5 drop in a yoga room?+

In a yoga room with doors closed and the unit correctly sized, most households see a large drop within half an hour of running a high speed.

How much does PM2.5 drop in a meditation room?+

In a meditation room with doors closed and the unit correctly sized, most households see a large drop within half an hour of running a high speed.

How much does PM2.5 drop in a puja room?+

In a puja room with doors closed and the unit correctly sized, most households see a large drop within half an hour of running a high speed.

How much does PM2.5 drop in a walk-in closet?+

In a walk-in closet with doors closed and the unit correctly sized, most households see a large drop within half an hour of running a high speed.

How much does PM2.5 drop in a dressing room?+

In a dressing room with doors closed and the unit correctly sized, most households see a large drop within half an hour of running a high speed.

How much does PM2.5 drop in a dining area?+

In a dining area with doors closed and the unit correctly sized, most households see a large drop within half an hour of running a high speed.

How much does PM2.5 drop in a dining room?+

In a dining room with doors closed and the unit correctly sized, most households see a large drop within half an hour of running a high speed.

How much does PM2.5 drop in a basement room?+

In a basement room with doors closed and the unit correctly sized, most households see a large drop within half an hour of running a high speed.

How much does PM2.5 drop in an attic room?+

In an attic room with doors closed and the unit correctly sized, most households see a large drop within half an hour of running a high speed.

How much does PM2.5 drop in a salon corner?+

In a salon corner with doors closed and the unit correctly sized, most households see a large drop within half an hour of running a high speed.

How much does PM2.5 drop in a clinic waiting corner?+

In a clinic waiting corner with doors closed and the unit correctly sized, most households see a large drop within half an hour of running a high speed.

How much does PM2.5 drop in a small shop counter?+

In a small shop counter with doors closed and the unit correctly sized, most households see a large drop within half an hour of running a high speed.

How much does PM2.5 drop in a boutique office cabin?+

In a boutique office cabin with doors closed and the unit correctly sized, most households see a large drop within half an hour of running a high speed.

How much does PM2.5 drop in a recording corner?+

In a recording corner with doors closed and the unit correctly sized, most households see a large drop within half an hour of running a high speed.

How much does PM2.5 drop in a gaming setup?+

In a gaming setup with doors closed and the unit correctly sized, most households see a large drop within half an hour of running a high speed.

How much does PM2.5 drop in a baby feeding corner?+

In a baby feeding corner with doors closed and the unit correctly sized, most households see a large drop within half an hour of running a high speed.

How much does PM2.5 drop in an elderly parent's room?+

In an elderly parent's room with doors closed and the unit correctly sized, most households see a large drop within half an hour of running a high speed.

Is PM2.5 a problem in Delhi?+

Delhi records elevated PM2.5 through its polluted season. Indoors, filtration is the most reliable defence.

Is PM2.5 a problem in New Delhi?+

New Delhi records elevated PM2.5 through its polluted season. Indoors, filtration is the most reliable defence.

Is PM2.5 a problem in Noida?+

Noida records elevated PM2.5 through its polluted season. Indoors, filtration is the most reliable defence.

Is PM2.5 a problem in Gurugram?+

Gurugram records elevated PM2.5 through its polluted season. Indoors, filtration is the most reliable defence.

Is PM2.5 a problem in Ghaziabad?+

Ghaziabad records elevated PM2.5 through its polluted season. Indoors, filtration is the most reliable defence.

Is PM2.5 a problem in Faridabad?+

Faridabad records elevated PM2.5 through its polluted season. Indoors, filtration is the most reliable defence.

Is PM2.5 a problem in Mumbai?+

Mumbai records elevated PM2.5 through its polluted season. Indoors, filtration is the most reliable defence.

Is PM2.5 a problem in Navi Mumbai?+

Navi Mumbai records elevated PM2.5 through its polluted season. Indoors, filtration is the most reliable defence.

Is PM2.5 a problem in Thane?+

Thane records elevated PM2.5 through its polluted season. Indoors, filtration is the most reliable defence.

Is PM2.5 a problem in Pune?+

Pune records elevated PM2.5 through its polluted season. Indoors, filtration is the most reliable defence.

Is PM2.5 a problem in Bengaluru?+

Bengaluru records elevated PM2.5 through its polluted season. Indoors, filtration is the most reliable defence.

Is PM2.5 a problem in Chennai?+

Chennai records elevated PM2.5 through its polluted season. Indoors, filtration is the most reliable defence.

Is PM2.5 a problem in Hyderabad?+

Hyderabad records elevated PM2.5 through its polluted season. Indoors, filtration is the most reliable defence.

Is PM2.5 a problem in Kolkata?+

Kolkata records elevated PM2.5 through its polluted season. Indoors, filtration is the most reliable defence.

Is PM2.5 a problem in Ahmedabad?+

Ahmedabad records elevated PM2.5 through its polluted season. Indoors, filtration is the most reliable defence.

Is PM2.5 a problem in Surat?+

Surat records elevated PM2.5 through its polluted season. Indoors, filtration is the most reliable defence.

Is PM2.5 a problem in Jaipur?+

Jaipur records elevated PM2.5 through its polluted season. Indoors, filtration is the most reliable defence.

Is PM2.5 a problem in Lucknow?+

Lucknow records elevated PM2.5 through its polluted season. Indoors, filtration is the most reliable defence.

Is PM2.5 a problem in Kanpur?+

Kanpur records elevated PM2.5 through its polluted season. Indoors, filtration is the most reliable defence.

Is PM2.5 a problem in Patna?+

Patna records elevated PM2.5 through its polluted season. Indoors, filtration is the most reliable defence.

Is PM2.5 a problem in Ranchi?+

Ranchi records elevated PM2.5 through its polluted season. Indoors, filtration is the most reliable defence.

Is PM2.5 a problem in Bhopal?+

Bhopal records elevated PM2.5 through its polluted season. Indoors, filtration is the most reliable defence.

Is PM2.5 a problem in Indore?+

Indore records elevated PM2.5 through its polluted season. Indoors, filtration is the most reliable defence.

Is PM2.5 a problem in Nagpur?+

Nagpur records elevated PM2.5 through its polluted season. Indoors, filtration is the most reliable defence.

Is PM2.5 a problem in Chandigarh?+

Chandigarh records elevated PM2.5 through its polluted season. Indoors, filtration is the most reliable defence.

Is PM2.5 a problem in Ludhiana?+

Ludhiana records elevated PM2.5 through its polluted season. Indoors, filtration is the most reliable defence.

Is PM2.5 a problem in Amritsar?+

Amritsar records elevated PM2.5 through its polluted season. Indoors, filtration is the most reliable defence.

Is PM2.5 a problem in Varanasi?+

Varanasi records elevated PM2.5 through its polluted season. Indoors, filtration is the most reliable defence.

Is PM2.5 a problem in Agra?+

Agra records elevated PM2.5 through its polluted season. Indoors, filtration is the most reliable defence.

Is PM2.5 a problem in Meerut?+

Meerut records elevated PM2.5 through its polluted season. Indoors, filtration is the most reliable defence.

Is PM2.5 a problem in Kochi?+

Kochi records elevated PM2.5 through its polluted season. Indoors, filtration is the most reliable defence.

Is PM2.5 a problem in Coimbatore?+

Coimbatore records elevated PM2.5 through its polluted season. Indoors, filtration is the most reliable defence.

Is PM2.5 a problem in Visakhapatnam?+

Visakhapatnam records elevated PM2.5 through its polluted season. Indoors, filtration is the most reliable defence.

Is PM2.5 a problem in Bhubaneswar?+

Bhubaneswar records elevated PM2.5 through its polluted season. Indoors, filtration is the most reliable defence.

Is PM2.5 a problem in Guwahati?+

Guwahati records elevated PM2.5 through its polluted season. Indoors, filtration is the most reliable defence.

Is PM2.5 a problem in Dehradun?+

Dehradun records elevated PM2.5 through its polluted season. Indoors, filtration is the most reliable defence.

Does PM2.5 spike while sleeping?+

Yes, while sleeping indoor PM2.5 commonly rises. Run High or Turbo until the indicator settles back.

Does PM2.5 spike while working from home?+

Yes, while working from home indoor PM2.5 commonly rises. Run High or Turbo until the indicator settles back.

Does PM2.5 spike during online classes?+

Yes, during online classes indoor PM2.5 commonly rises. Run High or Turbo until the indicator settles back.

Does PM2.5 spike while cooking?+

Yes, while cooking indoor PM2.5 commonly rises. Run High or Turbo until the indicator settles back.

Does PM2.5 spike just after cooking?+

Yes, just after cooking indoor PM2.5 commonly rises. Run High or Turbo until the indicator settles back.

Does PM2.5 spike during a party?+

Yes, during a party indoor PM2.5 commonly rises. Run High or Turbo until the indicator settles back.

Does PM2.5 spike while painting a room?+

Yes, while painting a room indoor PM2.5 commonly rises. Run High or Turbo until the indicator settles back.

Does PM2.5 spike during renovation?+

Yes, during renovation indoor PM2.5 commonly rises. Run High or Turbo until the indicator settles back.

Does PM2.5 spike in monsoon humidity?+

Yes, in monsoon humidity indoor PM2.5 commonly rises. Run High or Turbo until the indicator settles back.

Does PM2.5 spike during Diwali week?+

Yes, during Diwali week indoor PM2.5 commonly rises. Run High or Turbo until the indicator settles back.

Does PM2.5 spike during winter smog?+

Yes, during winter smog indoor PM2.5 commonly rises. Run High or Turbo until the indicator settles back.

Does PM2.5 spike on a high-AQI day?+

Yes, on a high-AQI day indoor PM2.5 commonly rises. Run High or Turbo until the indicator settles back.

Does PM2.5 spike when windows must stay open?+

Yes, when windows must stay open indoor PM2.5 commonly rises. Run High or Turbo until the indicator settles back.

Does PM2.5 spike in a ground-floor flat on a main road?+

Yes, in a ground-floor flat on a main road indoor PM2.5 commonly rises. Run High or Turbo until the indicator settles back.

Does PM2.5 spike in a top-floor flat?+

Yes, in a top-floor flat indoor PM2.5 commonly rises. Run High or Turbo until the indicator settles back.

Does PM2.5 spike in an old building?+

Yes, in an old building indoor PM2.5 commonly rises. Run High or Turbo until the indicator settles back.

Does PM2.5 spike in a newly built flat?+

Yes, in a newly built flat indoor PM2.5 commonly rises. Run High or Turbo until the indicator settles back.

Does PM2.5 spike with a pet cat?+

Yes, with a pet cat indoor PM2.5 commonly rises. Run High or Turbo until the indicator settles back.

Does PM2.5 spike with a pet dog?+

Yes, with a pet dog indoor PM2.5 commonly rises. Run High or Turbo until the indicator settles back.

Does PM2.5 spike with two pets?+

Yes, with two pets indoor PM2.5 commonly rises. Run High or Turbo until the indicator settles back.

Does PM2.5 spike with a newborn at home?+

Yes, with a newborn at home indoor PM2.5 commonly rises. Run High or Turbo until the indicator settles back.

Does PM2.5 spike with elderly parents at home?+

Yes, with elderly parents at home indoor PM2.5 commonly rises. Run High or Turbo until the indicator settles back.

Does PM2.5 spike in a shared flat?+

Yes, in a shared flat indoor PM2.5 commonly rises. Run High or Turbo until the indicator settles back.

Does PM2.5 spike in a PG room?+

Yes, in a PG room indoor PM2.5 commonly rises. Run High or Turbo until the indicator settles back.

Does PM2.5 spike while moving between homes?+

Yes, while moving between homes indoor PM2.5 commonly rises. Run High or Turbo until the indicator settles back.

Does PM2.5 spike during a house move?+

Yes, during a house move indoor PM2.5 commonly rises. Run High or Turbo until the indicator settles back.

Does PM2.5 spike in a smoking household?+

Yes, in a smoking household indoor PM2.5 commonly rises. Run High or Turbo until the indicator settles back.

Does PM2.5 spike near a construction site?+

Yes, near a construction site indoor PM2.5 commonly rises. Run High or Turbo until the indicator settles back.

Does PM2.5 spike near a busy junction?+

Yes, near a busy junction indoor PM2.5 commonly rises. Run High or Turbo until the indicator settles back.

Does PM2.5 spike near a garbage point?+

Yes, near a garbage point indoor PM2.5 commonly rises. Run High or Turbo until the indicator settles back.

Does PM2.5 spike during pollen season?+

Yes, during pollen season indoor PM2.5 commonly rises. Run High or Turbo until the indicator settles back.

Does PM2.5 spike during a dust storm?+

Yes, during a dust storm indoor PM2.5 commonly rises. Run High or Turbo until the indicator settles back.