You've probably seen it on the weather app right next to the temperature: a number, sometimes green, sometimes an alarming red or purple. That's the Air Quality Index — AQI — and most of us glance past it the way we glance past a stock ticker. But that number says more about your family's daily health than almost anything else on your phone.
What AQI Actually Measures
AQI is a standardized score, usually from 0 to 500, that tells you how polluted the air is right now. It's built from several pollutants measured together — the most important for indoor health being PM2.5, particles so small (2.5 microns or less) that they bypass your nose's natural filters entirely and travel straight into your lungs and bloodstream.
In India, the scale generally breaks down like this:
- 0–50 (Good): Air poses little to no risk
- 51–100 (Satisfactory): Minor breathing discomfort to sensitive people
- 101–200 (Moderate): Breathing discomfort to people with lung, heart disease, children and older adults
- 201–300 (Poor): Breathing discomfort on prolonged exposure
- 301–400 (Very Poor): Respiratory illness on prolonged exposure
- 401–500 (Severe): Affects healthy people, seriously impacts those with existing conditions
Most Indian metros spend a significant part of the year in the Moderate-to-Poor range — and a home's windows and doors don't stop PM2.5 the way you'd hope.
Why Indoor Air Deserves Just as Much Attention
Illustration generated for Kevelin
There's a common assumption that closing your windows solves the problem. It doesn't. Studies consistently show indoor AQI can be as bad as, or worse than, outdoor AQI — cooking, dust, incense, candles, and simple air exchange through doors and gaps all add to the particle count indoors. Your living room, bedroom, and home office aren't sealed bubbles.
This matters most for the people most affected by poor air:
- Children, whose lungs are still developing and who breathe faster relative to their body size
- Elderly parents, especially those with existing respiratory or heart conditions
- Anyone working from home, spending 8+ hours a day breathing the same indoor air
What You Can Actually Do About It
You don't need to overhaul your home to make a real difference. A few practical steps:
- Know your number. Check indoor and outdoor AQI with a monitor or app before deciding whether to open windows.
- Reduce indoor sources. Ventilate while cooking, avoid burning incense or candles in closed rooms, and keep dust and pet dander in check with regular cleaning.
- Filter the air you're already breathing. This is where a desktop air purifier earns its place — not as a luxury gadget, but as a quiet, always-on layer of protection for the room you spend the most time in.
This is exactly the gap KEVELIN Breath is built for. It's a compact desktop air purifier with a CADR of 200 m³/h — enough to actively clean the air in rooms up to 14–24 m², whether that's a bedroom, a home office, or the corner where your parents spend their afternoons. At under ₹4 a day to run, it's a small, consistent habit that adds up to real protection, not a one-time fix.
The Bottom Line
AQI isn't just a number for the news ticker — it's a daily signal about what your family is breathing, indoors and out. Checking it, reducing what you can, and filtering the rest is a simple routine that pays off in fewer allergy flare-ups, better sleep, and long-term lung health for everyone in the house.
Breathe easier at home with KEVELIN Breath — a premium desktop air purifier designed for real Indian homes. [Learn more at kevelin.in].