Clean Air Where

Clean Air Where Helping schools, nurseries and childcare settings understand and improve their air quality.

Training · Monitoring · Evidence-based

SE London | UK-wide remote
Enquiries welcome

Clean Air Where training was delivered at Lessness Heath Primary School this morning as part of their INSET day 💚The sch...
01/09/2026

Clean Air Where training was delivered at Lessness Heath Primary School this morning as part of their INSET day 💚

The school has already installed Smart Air air filters and timers in every classroom. Today’s 30-minute session helped staff understand why indoor air quality matters, how to use the equipment they have and what practical steps they can take throughout the school day.

Afterwards, Rich caught a Year 5 teacher dusting off an air monitor that hadn’t been used since 2021 - which feels like a pretty good start!

Clean Air Where training gives staff the knowledge and confidence to:

💚 recognise when the air in a classroom needs attention
💚 understand what their monitors are telling them
💚 improve ventilation and use air filtration effectively
💚 reduce exposure to pollutants and airborne infections
💚 better support pupils with asthma and allergies
💚 create classrooms that support focus, comfort and wellbeing
💚 make more sustainable choices by balancing ventilation, heat loss and energy use

Because providing the equipment is only the first step. Staff also need to understand how to use it and how to respond to what it shows.

A very exciting start to the new school year for Clean Air Where 💚

The government has just launched a new free air-quality alert service.You can choose an area that matters to you, such a...
28/08/2026

The government has just launched a new free air-quality alert service.

You can choose an area that matters to you, such as your home, workplace or local park, and get an SMS or email alert when air pollution is forecast to be high.

It covers PM₂.₅, PM₁₀, nitrogen dioxide, ozone and sulphur dioxide.

This is exactly the kind of information that can help people make more informed choices.

If pollution is high, you might decide to exercise at a different time, choose another route, reconsider when you ventilate your home, or take extra precautions if you or someone in your family is more vulnerable to air pollution.

And that matters particularly for children, pregnant women and people with existing heart or lung conditions, who the Chief Medical Officer specifically highlighted as being among those most affected by poor air quality.

We check the weather. Increasingly, I think checking the air quality should become just as normal.

Free, practical and definitely worth signing up for.

Sign up for the new air-quality alerts:
https://check-air-quality.service.gov.uk

A very well-ventilated day out at the British Library. 📚We were there from roughly 9:30–11am, then came back again aroun...
17/08/2026

A very well-ventilated day out at the British Library. 📚

We were there from roughly 9:30–11am, then came back again around 12:30–2pm to explore the Fairy Tales exhibition, see the Magna Carta and some of the other treasures on display.

Despite being a busy indoor space, CO₂ stayed impressively low throughout both visits, mostly around 500–800 ppm. The highest readings we found were actually in the toilets.

That matters in a place like a library because people can spend long periods indoors, often in fairly crowded rooms. As we breathe, CO₂ builds up unless enough outdoor air is being brought in.

Keeping CO₂ low in a busy space is a useful sign that exhaled air is being diluted effectively rather than accumulating around everyone.

That matters for comfort and concentration, but also because good ventilation helps reduce the build-up of infectious particles in shared indoor air.

The less infectious material building up around you, the lower your exposure to viruses. Which is great if you don’t want to get sick.

Good environmental control matters for the collection too. Stable temperature and humidity help protect books, manuscripts and historic documents from deterioration, while good ventilation keeps the space comfortable for the people using it.

Low CO₂ doesn’t tell us everything about indoor air quality, but readings like these were very reassuring.

We check the weather before making plans. Why not check the air quality too? 🌍Whether you want a simple everyday health ...
11/08/2026

We check the weather before making plans. Why not check the air quality too? 🌍

Whether you want a simple everyday health hack, you’re trying to reduce your exposure while exercising, if you’re pregnant, have children or live with an underlying health condition, there are lots of ways to make more informed choices about air quality.

Outdoor air quality can change with traffic, weather, local pollution sources and even smoke from distant wildfires.

Knowing what’s happening around you can help you decide when and where to exercise, which route to take, or when might be a better time to ventilate your home.

A few useful tools:

📱 Clean Air in Cities
A simple everyday check for current and forecast pollution.

🇬🇧 DEFRA UK-AIR
The official UK source for air-quality forecasts and monitoring.

📍 Breathe London
Useful for more local NO₂ and PM₂.₅ data across London.

🏃 AirTrack by Air Aware Labs
Helps you understand personal exposure, compare routes and times, and check pollen alongside air-quality data.

🌍 PurpleAir
Great for seeing hyperlocal particulate pollution, including smoke and wildfire events.

🔎 Aira Labs
Aira Go travels with you, measuring PM₂.₅, temperature and humidity so you can understand your real-world exposure throughout the day.

You don’t need to obsess over every reading.

The point is to have information that helps you make informed choices and reduce your exposure where you reasonably can.

Pregnant women are told to avoid soft cheese, alcohol, raw fish and too much caffeine.All of that advice is designed to ...
04/08/2026

Pregnant women are told to avoid soft cheese, alcohol, raw fish and too much caffeine.

All of that advice is designed to reduce risk to the developing baby.

We strongly promote vaccination, but we rarely talk about preventing exposure in the first place.

We’ve previously discussed the impact of air pollution on pregnancy. But what about viruses?

New research is beginning to show why that gap may matter.

A large US study of more than 18,000 live births found that maternal SARS-CoV-2 infection during pregnancy was associated with a higher rate of neurodevelopmental diagnoses by age 3, with the strongest association seen following third trimester infection.

https://pmc.ncbi.nlm.nih.gov/articles/PMC12607243/

A smaller Canadian prospective study also identified developmental concerns at 22 months following in utero exposure to SARS-CoV-2, although the authors note that the findings should be interpreted cautiously because of substantial loss to follow-up.

https://www.nature.com/articles/s41372-026-02819-2

Whether future studies strengthen or challenge these findings, one thing is already clear: we should be doing more to help pregnant women reduce their risk of infection.

We already know how to improve indoor air quality and reduce the transmission of airborne infections.

At Clean Air Where, we train schools, nurseries and childminders to understand, measure and improve the air children breathe. Reducing the spread of viruses in education and childcare settings doesn’t just benefit children and staff. It also means fewer viruses brought home to families, including pregnant women.

If we routinely advise pregnant women to avoid soft cheese, alcohol, raw fish and too much caffeine, why isn’t cleaner indoor air part of that conversation too?

Buying a HEPA filtration unit is only the first step. Whether it’s for a school, nursery, workplace or care home, educat...
31/07/2026

Buying a HEPA filtration unit is only the first step. Whether it’s for a school, nursery, workplace or care home, education is just as important as the equipment itself.

To get the best from it, you need to think about:

📏 Choosing a unit with enough clean air delivery (CADR) for the room.

👥 The size of the room and the number of people using it.

📍 Positioning the unit to maximise airflow.

🌬️ Understanding how HEPA filtration works alongside ventilation, rather than replacing it.

⚙️ Running it at an effective speed, not simply the quietest setting.

🔇 Factoring in noise when choosing a unit so it’s practical to run day after day.

🔄 Replacing filters and carrying out routine maintenance.

🎓 Helping staff and occupants understand what the different settings do and when they should be used.

HEPA filtration is an engineering control, not a magic box. Its effectiveness depends on choosing the right equipment, using it correctly and maintaining it properly.

🕯️ You wouldn’t heat a room with a candle. Why would you expect an undersized HEPA unit running on its lowest speed to clean the air effectively?

We often talk about carbon dioxide (CO₂), but nitrogen dioxide (NO₂) receives far less attention despite its impact on r...
27/07/2026

We often talk about carbon dioxide (CO₂), but nitrogen dioxide (NO₂) receives far less attention despite its impact on respiratory health.

NO₂ is produced whenever fuels such as natural gas, wood, petrol or diesel are burned. That means exposure isn’t limited to busy roads. It can also come from everyday activities inside our homes.

Understanding the different pollutants in the air, where they come from and how they affect our health helps us make informed decisions about the spaces where we live, learn and work.

At Clean Air Where, we’re working to make indoor air quality easier to understand because healthier indoor environments start with knowledge. Better indoor air quality isn’t achieved through one product or one intervention. It comes from understanding the different sources of pollution and knowing how to reduce exposure in everyday life.

Could replacing a gas stove improve asthma symptoms as much as some medications?A new US study suggests it could.Researc...
24/07/2026

Could replacing a gas stove improve asthma symptoms as much as some medications?

A new US study suggests it could.

Researchers followed 97 households with at least one person living with poorly controlled asthma. Half replaced their gas stove with an electric induction stove, while the other half continued cooking with gas.

Compared with the gas stove group, households using induction experienced:

* Around 70% fewer asthma-related hospital visits
* Around 80% fewer days missed from work or school
* A 70% reduction in indoor nitrogen dioxide (NO₂), a pollutant produced when gas burns.

The study was smaller than originally planned after funding ended early, so larger studies are still needed. However, it adds to a growing body of evidence that the air inside our homes can have a meaningful impact on respiratory health.

For most people, replacing an entire cooker isn’t realistic. That’s where education becomes important.

At Clean Air Where, we believe people deserve to understand what affects the air they breathe and the practical steps they can take to reduce exposure. Prevention doesn’t always require expensive changes.

If you have a gas stove, consider:

* Using an extractor hood that vents outdoors whenever you cook.
* Turning it on before cooking and leaving it running for 10-15 minutes afterwards.
* Opening a window where it’s safe and practical to do so.
* Using the back burners, as extractor hoods often capture pollutants more effectively from them.
* Keeping gas appliances well maintained so they burn with a clean blue flame.

If you’re planning a new kitchen in the future, induction is another factor worth considering alongside cost, energy efficiency and cooking performance.

Indoor air quality isn’t about perfection. It’s about understanding where pollutants come from and making informed choices that help reduce exposure over time, especially for people living with asthma or other respiratory conditions.

Thanks Kerry Woodward Respiratory Trainer for sharing this article.

📰 Article: https://www.theguardian.com/environment/2026/jul/24/replacing-gas-stove-can-help-asthmatics-as-much-as-some-drugs-us-experts-find

🌡️ Most people are surprised to learn that the NHS advises against using electric fans once indoor temperatures exceed 3...
21/07/2026

🌡️ Most people are surprised to learn that the NHS advises against using electric fans once indoor temperatures exceed 35°C.

Fans don’t cool the air - they cool you by helping sweat evaporate. Once the air becomes hotter than your skin, that cooling effect is no longer effective.

If you’ve been sweating heavily, or you’re feeling hot in general consider an oral rehydration solution such as Hydralyte or Dioralyte to replace lost fluids and salts.

🧂 Don’t have any? The NHS explains how to make your own oral rehydration drink:
https://www.nhs.uk/conditions/dehydration/

🚨 Know the signs of heatstroke. Call 999 if someone:
• becomes confused
• loses consciousness
• has a seizure (fit)
• has a very high temperature and is not responding to cooling measures

Older adults, babies and young children, pregnant women, and people with long-term health conditions are at greater risk during periods of extreme heat.

Stay safe, look after one another, and check in on anyone who may need extra support. ☀️

17/07/2026

Our washable customisable pre-filters help capture larger dust particles before they reach the main filter, while adding a customised finish to your unit.

Perfect for schools, offices, and public-facing spaces, they’re easy to remove, easy to wash, and available in standard or bespoke designs.

Personalise your SA700 today.

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