Indoor air quality surveys in Dyfed

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.

Our team is based in Great Barr, Birmingham, and we work throughout Dyfed, from Ammanford, Aberystwyth, Carmarthen, Haverfordwest and Milford Haven. This is a charged visit. We confirm the cost in writing before we book it.

Air quality surveys in Dyfed at a glance

Area: Dyfed, Wales
Towns listed: 6, largest Llanelli
Postcode districts: SY24, SA31, SA33, SA61, SA62 and SA71
Price region: Wales
Survey: Charged visit, price agreed first

What the work 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.

Before and after

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

Spot checks

Readings taken during a single visit, where a quick answer is enough.

Home survey

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

Guide prices in Dyfed

Indoor air quality surveys guide prices in Dyfed
Work	Guide price
Home air quality check: CO2, humidity and temperature logged for 7 days (per home)	£140–£235 inc VAT
Workplace air quality survey: CO2, PM2.5, humidity, 7 days logged, written report (per survey)	£470–£1,125 + VAT

These ranges use our Wales rates. Home prices include VAT at 20%; business prices exclude VAT. You get a fixed written price before any work is booked.

When to get it looked at

Staff complaints about stuffiness
A new ventilation system that does not feel right
A bedroom that feels stale in the morning

Rules in Wales

In Wales, ventilation follows the Welsh Approved Document F rather than the English version, with building control checking notifiable work. Employers in Wales also have the Workplace Regulations 1992 duty to ventilate enclosed workplaces.

How the job runs

Plan
Place loggers
Log
Analyse
Report

Towns we cover in Dyfed

Questions about indoor air quality surveys in Dyfed

Are prices different in Dyfed?

Our guide prices are adjusted by region. In Dyfed we use Wales rates, so home air quality check: CO2, humidity and temperature logged for 7 days is typically £140 to £235 inc VAT per home.

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.

Is the survey free in Dyfed?

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.

Which rules apply to ventilation in Dyfed?

In Wales, the Welsh Government's own Approved Document F (2022 edition) applies to ventilation in homes, with a new edition taking effect on 4 March 2027. Rented homes must be fit for human habitation under the Renting Homes (Wales) Act 2016, and workplaces must be ventilated under the Workplace (Health, Safety and Welfare) Regulations 1992.