Indoor air quality surveys in Hertfordshire

An indoor air quality survey measures how fresh and how damp the air in a building really is, over days rather than minutes. We place loggers that record CO2, humidity and temperature (and particulates in workplaces), then explain what the readings mean and what ventilation changes would help.

If you are anywhere in Hertfordshire, send the postcode and a few photos and we will tell you what we would recommend. Towns we cover include Bishop's Stortford, Watford, Hemel Hempstead, Stevenage and St Albans.

Air quality surveys in Hertfordshire at a glance

Area: Hertfordshire
Towns listed: 32, largest Watford
Postcode districts: SG8, HA6, WD3, EN7, EN8 and WD1
Price region: East of England
Survey: Charged visit, price agreed first

What indoor air quality surveys involves

CO2 is a practical indicator of whether a room is getting enough fresh air for the number of people in it: levels that climb steadily through a meeting or a night in a bedroom point to under-ventilation. Humidity readings show whether moisture is being removed or lingering long enough to cause condensation and mould. Surveys are useful before spending money: they show whether a problem is constant or happens at particular times, which rooms are worst, and whether an existing system is doing its job.

Home survey

Loggers in bedrooms, living areas and wet rooms for 7 days, with a written summary.

Workplace survey

CO2, humidity, temperature and particulates in offices, classrooms or meeting rooms.

Before and after

Readings taken before and after a ventilation upgrade to show the difference.

Guide prices in Hertfordshire

Indoor air quality surveys guide prices in Hertfordshire
Work	Guide price
Home air quality check: CO2, humidity and temperature logged for 7 days (per home)	£150–£255 inc VAT
Workplace air quality survey: CO2, PM2.5, humidity, 7 days logged, written report (per survey)	£525–£1,250 + VAT

Guide prices using East of England rates. Home prices include VAT at 20%; business prices exclude VAT. A guide price is not a quote: we confirm a fixed price in writing first.

Common reasons people call

A new ventilation system that does not feel right
A bedroom that feels stale in the morning
Headaches or drowsiness in meeting rooms or classrooms

Rules in England

English building work follows Approved Document F (2021 edition) for ventilation rates, installation and commissioning. Employers have a separate duty under the Workplace Regulations 1992 to provide effective and suitable ventilation.

How the job runs

Plan
Place loggers
Log
Analyse
Report

Towns we cover in Hertfordshire

Questions about indoor air quality surveys in Hertfordshire

Is the survey free in Hertfordshire?

This is a charged visit because it is servicing, testing or repair work. We tell you the cost before booking. Surveys for new installations on the UK mainland are free.

Do you measure particulates?

Workplace surveys include PM2.5 particulates; homes can have them added on request.

What is a good CO2 level indoors?

Outdoor air is around 400 to 450 parts per million; indoor levels that stay well below about 1,000 ppm usually indicate reasonable ventilation for the people in the room, while sustained levels much higher suggest it needs improving.

Which rules apply to ventilation in Hertfordshire?

In England, ventilation in new and altered homes is covered by Approved Document F of the Building Regulations. Landlords also have duties under the Housing Health and Safety Rating System, and workplaces must be ventilated under the Workplace (Health, Safety and Welfare) Regulations 1992.

Which towns in Hertfordshire do you cover?

All of Hertfordshire, including Bishop's Stortford, Watford, Hemel Hempstead, Stevenage and St Albans. If your town is not listed, send the postcode and we will confirm.