Child and adolescent Health Impacts of Learning Indoor environments under net zero: The CHILI Hub
Lead Research Organisation:
UNIVERSITY COLLEGE LONDON
Department Name: Community Child Health
Abstract
What is this research project about?
The aim of the CHILI Hub is to ensure that we support and improve children's and education as school and nursery buildings are being made environmentally sustainable.
Who are we?
We are a group of researchers from a range of backgrounds, including engineering, public health, clinical medicine, mental health research and education.
Why are we doing this research?
By 2050, the UK should not put more carbon emissions (which lead to global warming) into the atmosphere than it takes out. This is known as the 'net zero target'.
To meet this target, we need to make buildings in the UK more energy efficient.
Schools and nurseries make up 15% of carbon emissions from public buildings in the UK. Nowadays, more insultation and airtight building designs are used to make buildings more energy efficient. This means less energy is required to heat buildings, but it may also lead to more indoor air pollution becoming trapped, or making it very hot indoors. Respiratory infections also spread more easily in airtight buildings.
Children and young people spend most of their time in school indoors. The indoor environment at school can support children's physical and mental health, and their education. Therefore, it is important to check and observe how the indoor environment in schools can affect children and young people's health as school and nursery buildings are being adapted to meet the net zero target.
What will the CHILI Hub research?
The CHILI Hub which will focus on six aspects:
Map: We will measure indoor air pollution in classrooms and schools across England and Wales and combine these measurements with measured and estimated outdoor air pollution data. This will help us develop indicators of indoor environments in schools that can be compared between areas.
Understand: We will combine these school indoor environment indicators with national data on children's health and education, collected by hospitals, pharmacies and schools in England and Wales. We will research the link between indoor air pollution or heat in schools and children's health and school non-attendance.
Model: We will develop combined building and health impact assessment models, which describe the impact of climate change and energy efficient building alterations, on indoor environments in schools. We will use these models to work out how these changes will affect children's health in the future.
Test and evaluate: We will evaluate (weigh-up) if existing technology and behaviours to improve the indoor environment support children's health. This will include examining if installation of air cleaning filters affects children's use of health services, and if window opening impact children's comfort in classrooms.
Involve: We will work with children, young people and teachers to develop data collection methods to measure the impact of the indoor environment on children's health and education.
Engage: We will set up a network of individuals and organisations who work with, or will be affected by making school buildings meet the net zero target. We will work with them to identify and describe any barriers to making school buildings energy efficient.
We will work closely with policy makers, schools, parents and carers, and children and young people to ensure our findings improve health and education for all children.
The aim of the CHILI Hub is to ensure that we support and improve children's and education as school and nursery buildings are being made environmentally sustainable.
Who are we?
We are a group of researchers from a range of backgrounds, including engineering, public health, clinical medicine, mental health research and education.
Why are we doing this research?
By 2050, the UK should not put more carbon emissions (which lead to global warming) into the atmosphere than it takes out. This is known as the 'net zero target'.
To meet this target, we need to make buildings in the UK more energy efficient.
Schools and nurseries make up 15% of carbon emissions from public buildings in the UK. Nowadays, more insultation and airtight building designs are used to make buildings more energy efficient. This means less energy is required to heat buildings, but it may also lead to more indoor air pollution becoming trapped, or making it very hot indoors. Respiratory infections also spread more easily in airtight buildings.
Children and young people spend most of their time in school indoors. The indoor environment at school can support children's physical and mental health, and their education. Therefore, it is important to check and observe how the indoor environment in schools can affect children and young people's health as school and nursery buildings are being adapted to meet the net zero target.
What will the CHILI Hub research?
The CHILI Hub which will focus on six aspects:
Map: We will measure indoor air pollution in classrooms and schools across England and Wales and combine these measurements with measured and estimated outdoor air pollution data. This will help us develop indicators of indoor environments in schools that can be compared between areas.
Understand: We will combine these school indoor environment indicators with national data on children's health and education, collected by hospitals, pharmacies and schools in England and Wales. We will research the link between indoor air pollution or heat in schools and children's health and school non-attendance.
Model: We will develop combined building and health impact assessment models, which describe the impact of climate change and energy efficient building alterations, on indoor environments in schools. We will use these models to work out how these changes will affect children's health in the future.
Test and evaluate: We will evaluate (weigh-up) if existing technology and behaviours to improve the indoor environment support children's health. This will include examining if installation of air cleaning filters affects children's use of health services, and if window opening impact children's comfort in classrooms.
Involve: We will work with children, young people and teachers to develop data collection methods to measure the impact of the indoor environment on children's health and education.
Engage: We will set up a network of individuals and organisations who work with, or will be affected by making school buildings meet the net zero target. We will work with them to identify and describe any barriers to making school buildings energy efficient.
We will work closely with policy makers, schools, parents and carers, and children and young people to ensure our findings improve health and education for all children.
Organisations
- UNIVERSITY COLLEGE LONDON (Co-funder, Lead Research Organisation)
- LocatED (Project Partner)
- National Education Union (NEU) (Project Partner)
- CYSTIC FIBROSIS TRUST (Project Partner)
- ADHD Foundation (Project Partner)
- SWANSEA UNIVERSITY (Project Partner)
- Royal College of Paediatrics (Project Partner)
- DEPARTMENT FOR EDUCATION (Project Partner)
- CIBSE (Project Partner)
- Asthma and Lung UK (Project Partner)
- Early Education (Project Partner)
- WELSH GOVERNMENT (Project Partner)
Publications
Akaraci S
(2025)
Kids' Environment and Health Cohort: Database Protocol: supplementary appendix.
in International journal of population data science
Cruz J
(2026)
Towards cleaner air: PM2.5 exposure and disparities around childcare providers in England
in Environmental Research
Hardelid P
(2026)
Cleaning and validating longitudinal maternal and child postcode histories from a national healthcare registry for environmental health research in London, UK.
in International journal of population data science
Hart C
(2025)
Housing tenure and early-life acute lower respiratory tract infection admissions in two national Scottish birth cohorts.
in BMJ public health
Horsfall L
(2025)
High-resolution mapping of residential wood burning heat sources using Energy Performance Certificates: A case study of England and Wales.
in Environment international
Iliou A
(2026)
A Multiomic Approach Integrating Genomic and Metabolomic Data Highlights Colorectal Cancer Pathways.
in Journal of proteome research
| Description | Air pollution exposure and respiratory health research in children: the value of linked administrative data |
| Geographic Reach | National |
| Policy Influence Type | Influenced training of practitioners or researchers |
| Description | Article in The Conversation: "Who controls the air we breathe at home?" |
| Geographic Reach | National |
| Policy Influence Type | Contribution to new or improved professional practice |
| Impact | >3000 reads on the importance of indoor air quality |
| URL | https://theconversation.com/who-controls-the-air-we-breathe-at-home-awaabs-law-and-the-limits-of-ind... |
| Description | Attendance at Home Energy West Yorkshire collaborative workshop on retrofit plans |
| Geographic Reach | National |
| Policy Influence Type | Contribution to new or improved professional practice |
| Description | CHILI Hub included in DfE "teach-in" |
| Geographic Reach | National |
| Policy Influence Type | Influenced training of practitioners or researchers |
| Description | CHILI logo co-design workshop with Morriston Primary School |
| Geographic Reach | National |
| Policy Influence Type | Contribution to new or improved professional practice |
| Description | Contribution to the Environmental Audit Committee (EAC) call for evidence on air quality (with CIBSE) |
| Geographic Reach | National |
| Policy Influence Type | Participation in a guidance/advisory committee |
| Impact | Raised the profile of indoor air quality in a national level committee, including related to indoor air quality inequalities |
| URL | https://committees.parliament.uk/committee/62/environmental-audit-committee/news/211420/mps-to-inves... |
| Description | HESTIA Network Launch |
| Geographic Reach | National |
| Policy Influence Type | Participation in a guidance/advisory committee |
| Impact | Strengthened links between the NIHR projects, and other UKRI and NIHR investments in Healthy indoor environments, including the EPSRC Micro Network Pluses, the UKRI-NIHR Net Zero Hubs, and other NIHR retrofit projects |
| URL | https://hestia-network.org/launch-event |
| Description | Health co-benefits of net zero: challenges, knowledge gaps and opportunities |
| Geographic Reach | National |
| Policy Influence Type | Contribution to a national consultation/review |
| Description | Meeting with Camden Council to discuss CHILI and school recruitment |
| Geographic Reach | National |
| Policy Influence Type | Contribution to a national consultation/review |
| Description | Meetings with Essex Council, Camden Council, and Let's Go Zero |
| Geographic Reach | National |
| Policy Influence Type | Contribution to a national consultation/review |
| Description | Panel discussion for World Ventilation Day 2025 webinar |
| Geographic Reach | National |
| Policy Influence Type | Participation in a guidance/advisory committee |
| Description | Presentation at Cambridge Engineering Fluids Seminar on School Air Quality |
| Geographic Reach | National |
| Policy Influence Type | Influenced training of practitioners or researchers |
| Description | Presentation at Clean Air Champions Showcase, National Physical Laboratory |
| Geographic Reach | National |
| Policy Influence Type | Contribution to new or improved professional practice |
| Description | Presentation at Clean Air Fund workshop in York |
| Geographic Reach | National |
| Policy Influence Type | Contribution to a national consultation/review |
| Description | Presentation at HDR UK & ONS Data Science Campus Health Data Science Seminar |
| Geographic Reach | National |
| Policy Influence Type | Contribution to new or improved professional practice |
| URL | https://www.adruk.org/news-publications/news-blogs/pollution-green-spaces-and-housing-how-our-enviro... |
| Description | Presentation at SPF Clean Air Fund conference |
| Geographic Reach | National |
| Policy Influence Type | Contribution to a national consultation/review |
| Description | Presentation at joint unions webinar - Improving air quality in schools |
| Geographic Reach | National |
| Policy Influence Type | Influenced training of practitioners or researchers |
| Description | Presentation on CHILI Hub to CIBSE Educational Buildings Group |
| Geographic Reach | National |
| Policy Influence Type | Influenced training of practitioners or researchers |
| Description | Presentation on RPCA analysis of School PM2.5 at UKIEG 2025 |
| Geographic Reach | National |
| Policy Influence Type | Contribution to new or improved professional practice |
| Description | Presentation on School Air Quality to DEFRA and DfE |
| Geographic Reach | National |
| Policy Influence Type | Contribution to a national consultation/review |
| Description | Presentation to AIVC symposium in Stuttgart |
| Geographic Reach | National |
| Policy Influence Type | Contribution to new or improved professional practice |
| Description | Presentation to French Government agency Cerema |
| Geographic Reach | National |
| Policy Influence Type | Participation in a guidance/advisory committee |
| Description | Presentation to Herts County Council Cleaner Air Members seminar on school HEPA filter impact |
| Geographic Reach | National |
| Policy Influence Type | Participation in a guidance/advisory committee |
| Description | Presentation to the Corsi-Rosenthal Foundation |
| Geographic Reach | National |
| Policy Influence Type | Contribution to new or improved professional practice |
| Description | Senior DfE staff - Presentation and discussion on CHILI aims and DfE needs |
| Geographic Reach | National |
| Policy Influence Type | Participation in a guidance/advisory committee |
| Description | Talks and panel participation at Education Estates Sustainability & SEND Conference |
| Geographic Reach | National |
| Policy Influence Type | Contribution to new or improved professional practice |
| URL | https://www.educationestates.com/sustainability-conference |
| Description | Team visits to schools to assist with installation of outdoor air quality monitors |
| Geographic Reach | National |
| Policy Influence Type | Contribution to new or improved professional practice |
| Description | The CHILI project: opportunities and challenges |
| Geographic Reach | National |
| Policy Influence Type | Contribution to new or improved professional practice |
| Description | UKIEG 2025 - Invitation to showcase CHILI Hub poster |
| Geographic Reach | National |
| Policy Influence Type | Contribution to a national consultation/review |
| URL | https://ukieg431081511.wordpress.com/events/ |
| Description | Using linked administrative data to estimate the impact of air pollution on children's health and education |
| Geographic Reach | National |
| Policy Influence Type | Contribution to new or improved professional practice |
| URL | https://wm-netzero.org.uk/event/2025-ukhsa-annual-outdoor-and-indoor-air-pollution-research-review-m... |
| Description | Air and Noise Pollution Mitigation through Integrated, Society-Centred Actions (ATMOPOLIS) |
| Amount | € 4,999,715 (EUR) |
| Funding ID | 101238690 |
| Organisation | European Union |
| Sector | Public |
| Country | European Union (EU) |
| Start | 01/2026 |
| End | 12/2029 |
