
Commercial · Education
Healthier air for classrooms, so kids learn and stay in class
Quiet, low running cost HEPA purifiers and Air monitoring for Indian schools, classrooms and early childhood centres. Reduce the air pollution empty seats in winter, and keep the air kids breathe clear enough to focus, without a noisy unit teachers end up switching off.
Why it matters
Classrooms fill with stale air and bugs, fast
Air pollution in Indian classrooms severely harms children’s health, lowers test scores, and disrupts education. High particulate matter PM 2.5 and indoor carbon dioxide levels cause asthma, fatigue, and poor concentration
100%
100% of surveyed schools failed basic indoor air safety criteria for fine particulates.Indoor PM2.5 and PM10 values routinely hover at 2.5 to 15 times higher than safe baseline parameters
IIT DELHI
81 %
81% of naturally ventilated classrooms exceeded the recommended 1,000 ppm threshold for CO2.Indian classrooms frequently record median spikes well above 1,500 ppm
MDPI
1000ppm
Bureau of Indian Standards (BIS) and green building codes align with international standards, recommending that indoor levels be kept below 1,000 ppm to maintain cognitive function
Bureau of Indian Standards (BIS)
Better
attendance and academic results are linked to well ventilated, healthier classrooms
Public Health Communication Centre
The honest part first: those high CO2 numbers are a ventilation problem, and the fix is fresh air and a monitor to show when to open up. A purifier does not lower CO2. Where it earns its place is the other half, removing the airborne bugs and fine particles that drive winter absences, especially in the cold months when windows stay shut, and in rooms that cannot open a window at all.
The classroom reality
What schools and preschools are dealing with
Learning spaces have a particular set of pressures. Knowing which is which helps you put fresh air, monitoring and filtration where each actually helps.
Stuffy, high CO2 rooms
A full classroom builds CO2 quickly, and high CO2 is linked to poor concentration and impaired learning. This is a ventilation job, fresh air and a monitor, not something a purifier fixes.
Coughs, colds and flu
Schools are a primary setting for respiratory bugs to spread, and kids pass them around fast. Cleaner air helps cut the airborne load that turns one sick child into a half empty class.
Nap and sleep rooms
Many preschool sleep rooms cannot open a window, so ventilation is limited just when little ones are breathing the same air for an hour or two. A quiet purifier is a genuine help here.
Winter, windows shut
Indian winters mean closed windows for warmth, which is exactly when ventilation drops and bugs circulate most. A filtration layer keeps working when the windows cannot.
The Industrial Proximity
In New Delhi, over 90% of private schools sit within 5 km of an active toxic site handling heavy metals or chemical manufacturing.
The honest summary
Open windows and a CO2 monitor handle the stuffiness. A quiet HEPA purifier handles the airborne bugs and particles, the part that keeps working through a cold Indian winter.
Match it to the space
Which purifier suits which learning space
Schools and centres run from small sleep rooms to big multipurpose halls, so the right answer is usually a mix sized to each space. Here is a practical starting point. We will confirm sizing for your rooms.
| Space | Rough size | Good fit | Why |
|---|---|---|---|
| Preschool sleep rooms, small activity rooms | Up to ~25m² | SA600 or Sqair | The SA600 runs at 16dB on low, quiet enough for nap time and for rooms that cannot open a window. The Sqair is the value pick. |
| Standard classrooms | Up to ~60m² | SA600 or SA700 | Both stay quiet enough to leave on through a lesson. The SA700 wall or ceiling mounts, keeping it off the floor and out of reach of small hands. |
| Large classrooms, flexible learning spaces, ECE activity rooms | Up to ~85m² | SA700 or Blast Mini | Strong clean air output for bigger, busier rooms. The SA700 mounts out of the way, the Blast Mini moves on castors. |
| Halls, gyms, multipurpose rooms | Up to ~130m² | Blast Mk II | The highest clean air output we stock, for the largest shared spaces. Big rooms may need more than one. |
Room sizes are a guide based on roughly 3 air changes per hour. Send us your spaces and we will size it properly, and help you prioritise the rooms that need it most.
The range
Quiet purifiers teachers will actually leave on
Sized by clean air delivered (CADR), and chosen for low noise and low running cost. The SA700 mounts out of children’s reach. For sleep rooms and small spaces, the Sqair and SA600 round out the range.

ALL-ROUNDER
Best classroom purifier, UK study
SA600
500
CADR m³/h
85m²
Room size
49dB
Noise
Three speeds and a washable pre-filter, on castors to move between rooms. H13 HEPA as standard. Clears an 85m² space in around 17 minutes on high.

ALL-ROUNDER
Best classroom purifier, UK study
Blast Mini Mk II
740
CADR m³/h
85m²
Room size
49dB
Noise
Three speeds and a washable pre-filter, on castors to move between rooms. H13 HEPA as standard. Clears an 85m² space in around 17 minutes on high.

MOST-POWERFULL
Blast Mk II
740
CADR m³/h
85m²
Room size
49dB
Noise
Three speeds and a washable pre-filter, on castors to move between rooms. H13 HEPA as standard. Clears an 85m² space in around 17 minutes on high.
Independently tested
Named best classroom air purifier out of 13 models tested
HouseFresh and Safe Air Schools ran an independent UK comparison of 13 popular classroom air purifiers, judged on real-world CADR, noise levels and running costs. The Blast Mini Mk II, the same model available here, came out on top, rated quiet enough to run through the school day without a big power bill.
Sleep rooms and small spaces?
For preschool nap rooms, small activity rooms and quiet corners, the SA600 and Sqair are the right scale. The SA600 runs at just 16dB on low, quiet enough to leave on through nap time.
Monitoring
Make the stuffy air visible
Air Quality is the simplest signal that a classroom needs Air Purification. A monitor on the wall turns it into a number teachers can act on.
Monitors are the only practical way to measure Pollution, CO2.
Honest pairing: a monitor does not clean the air, and a purifier does not lower CO2. The monitor tells you when to ventilate, the purifier handles the bugs and particles when you cannot.
Smart Air Quality Monitor
A simple Monitor for PM2.5, CO2, temperature and humidity, with real time Wi-Fi alerts. Wall mountable. Ideal for classrooms and ECE sleep rooms.
Air Quality MonitorsAir Purifiers to Combat Viruses, Allergens, and Pollution
Our air purifiers are simple and easy to set up! They are plug-and-play, requiring no retrofitting or installation. Their quiet operation also allows it to discreetly fit into any environment. With Smart Air purifiers, healthy indoor air is produced effortlessly and without fuss.
Reduce COVID-19 Transmission In Your Classroom

The CDC recommends HEPA air purifiers like Smart Air’s to lower the spread of COVID-19.
Protect your classroom today with our simple, data-backed HEPA air purifiers.
Why Choose Smart Air for the Classroom
Our focus is on creating the most effective air purifiers driven by data and at a fraction of the cost of the competition.
We believe everyone deserves to breathe clean air.

Smart Air Purifiers

Cost-Effective

Quiet

Energy-Efficient Design

CE, RoHS Certified

Certified B-Corp

Full Warranty

A purifier company you can trust
Smart Air is different from your average air purifier company. University of Chicago professor Thomas Talhelm founded Smart Air as a social enterprise in 2014 to combat the high prices most companies charge for air purifiers.
We will help your business get clean air at an honest price.
Want Help Creating a Plan for Your School?
Get in Touch!
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