Schools and care homes have something important in common: they hold some of the people most affected by poor air quality, for some of the longest hours of the day. Children’s lungs are still developing.

Older residents in care homes often already live with respiratory or heart conditions. Both settings also answer to a regulator that expects evidence, not assumptions, about the environment they provide.

This guide explains why air quality monitoring matters in both settings, what UK guidance actually requires, what to monitor, and what a professional survey involves with genuine UK standards throughout, not the US benchmarks most guides online are built around.

Why air quality monitoring matters for schools and care homes

Air quality monitoring gives schools and care homes real evidence of the conditions people are breathing, rather than a guess. Both settings hold occupants who are more vulnerable than the general population, spend long uninterrupted hours indoors, and are subject to scrutiny from parents, families, regulators and inspectors. Monitoring turns “we think the building is fine” into a documented, defensible fact.

Schools: what UK guidance requires

UK school ventilation and indoor air quality are governed by Building Bulletin 101 (BB101), the Department for Education’s guidance on ventilation, thermal comfort and indoor air quality in schools.

It sets a working limit of 1,500 ppm CO2 as a daily average during the school day, and recommends that levels shouldn’t exceed 2,000 ppm for more than a short period during any occupied session.

CO2 is used as a proxy for ventilation adequacy high CO2 means the room isn’t getting enough fresh air, and that carries other pollutants and higher infection risk with it.

Beyond CO2, schools increasingly monitor:

• PM2.5 — from traffic outside, kitchens, and art or design technology rooms
• Temperature and humidity — comfort and concentration, and a factor in mould risk
• VOCs — particularly after building work, new furniture, or redecoration

Ofsted inspections don’t measure air quality directly, but a well ventilated, comfortable classroom environment sits within the wider standard of a safe, well managed school and monitoring data gives a school business manager or headteacher hard evidence to show governors, parents or an inspector if it’s ever questioned.

Care homes: what UK guidance requires

Care homes are regulated by the Care Quality Commission (CQC), and while CQC doesn’t set a numerical air quality limit, its Fundamental Standards require that premises are suitable, safe, and properly ventilated for the people living there. HSE guidance on workplace ventilation applies too, since care homes are also a workplace for staff.

The pollutants that matter most in a care setting are different from a school:

• CO2 — still a ventilation indicator, but care home occupancy patterns are steadier through the day, so spikes usually point to a specific room problem rather than a class changeover
• PM2.5 and PM10 — residents with COPD, asthma or cardiovascular disease are significantly more affected by particulates than a healthy adult
• Humidity — care homes often run warmer for resident comfort, which increases mould and dust mite risk if humidity isn’t controlled
• VOCs — from cleaning products used far more intensively than in most buildings, and from clinical materials

Family members increasingly ask about the environment their relative lives in, and a care home that can produce genuine monitoring data has a stronger answer than one relying on “the building feels fine.”

Schools vs care homes: monitoring priorities compared

Factor	Schools	Care Homes
UK guidance	Building Bulletin 101 (DfE)	CQC Fundamental Standards, HSE workplace guidance
Primary indicator	CO2 (target: 1,500 ppm daily average)	CO2 and PM2.5 given resident vulnerability
Occupancy pattern	Sharp spikes at class changeover and breaks	Steady, near-continuous occupancy
Most vulnerable to	Developing lungs, higher breathing rate per body weight	Existing respiratory and cardiovascular conditions
Common trigger for testing	Parent concern, stuffy classroom reports, refurbishment	CQC inspection prep, family concern, new build/refurb

How our monitoring surveys work

Step 1 — Survey design. We agree which rooms matter most busiest classrooms, communal lounges, dining areas and which pollutants to monitor based on the building and its occupants.

Step 2 — On-site monitoring. We install monitoring equipment for the agreed period, capturing CO2, PM2.5, temperature and humidity as needed, without disrupting the school day or residents’ routines.

Step 3 — Analysis and reporting. We compare the results against BB101 or CQC relevant benchmarks and produce a clear report your governors, senior management team or CQC inspector can actually use plain findings, not just raw data.

A real project example

We recently carried out an indoor air quality survey for a primary school in the West Midlands after staff raised concerns about stuffy afternoon classrooms.

Monitoring showed CO2 regularly exceeding 2,000 ppm in two ground-floor classrooms during the final teaching period well above the BB101 threshold. The cause turned out to be a simple one: mechanical ventilation in those two rooms was running on a schedule that didn’t match the actual timetable.

Adjusting the ventilation schedule brought both rooms back under the daily average target within a week, verified by a short follow up monitoring period. The whole process, from initial survey to resolved problem, took under a month far simpler and cheaper than the plant replacement the school had been quoted for elsewhere.

What does a monitoring survey cost?

For a single school or care home, a monitoring survey covering several key rooms typically costs in the region of £800 to £2,500, depending on how many rooms are monitored and for how long.

Multi site providers and academy trusts benefit from a lower per-site cost when several buildings are surveyed together. Most surveys run for one to four weeks to capture a representative picture of daily and weekly patterns.

Common mistakes to avoid

• Monitoring only one room. CO2 and PM2.5 vary significantly between rooms a single sensor in the office tells you nothing about the busiest classroom or lounge.
• Ignoring occupancy patterns. A short snapshot reading misses the peaks that actually matter. Surveys need to run long enough to capture a typical day or week.
• Treating schools and care homes the same. The guidance, the vulnerable population, and the occupancy pattern are all different a generic approach misses what matters in each setting.
• Waiting for a complaint. The schools and care homes that get ahead of this monitor proactively, rather than reacting to a parent, family member, or inspector raising it first.

How FreshBreeze can help

We carry out indoor air quality monitoring for schools, academy trusts and care homes across London, Birmingham and Manchester, benchmarked against BB101 and relevant CQC and HSE standards. If you’re not sure what your building needs, we’ll tell you honestly before any equipment goes on site.

Find out more about our indoor air quality testing or air quality monitoring services.

Conclusion

Schools and care homes both hold people who are more affected by poor air than most of us and both now face real expectations, from regulators, parents, and families, to show the environment is properly managed. Monitoring is what turns that expectation into evidence.

A short, well designed survey tells you exactly where the problems are, whether that’s a ventilation schedule out of sync with the school day or a lounge that needs better air exchange and gives you the data to prove it’s been fixed.

FAQs