Indoor air quality surveys in South Glamorgan

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.

South Glamorgan has every kind of building, from old terraces to new estates and business parks, and every job is designed around the building in front of us, not a standard kit.

Air quality surveys in South Glamorgan at a glance

Area: South Glamorgan, Wales
Towns listed: 6, largest Cardiff
Postcode districts: CF61, CF71, CF5, CF14, CF14 and CF15
Price region: Wales
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.

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 South Glamorgan

Indoor air quality surveys guide prices in South Glamorgan
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

Guide prices using Wales 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.

When to get it looked at

Headaches or drowsiness in meeting rooms or classrooms
Condensation and mould with no obvious cause
You want evidence before spending money on ventilation

Rules in Wales

Wales has its own Part F ventilation guidance, published by the Welsh Government, and work is checked by building control. 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 South Glamorgan

Questions about indoor air quality surveys in South Glamorgan

Is the survey free in South Glamorgan?

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.

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.

What humidity should a home be?

Relative humidity of roughly 40 to 60 percent is comfortable for most homes. Readings that sit above 70 percent for long periods make condensation and mould much more likely.

Which rules apply to ventilation in South Glamorgan?

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.

Which towns in South Glamorgan do you cover?

All of South Glamorgan, including Cardiff, Barry, Penarth, Llantwit Major and Whitchurch. If your town is not listed, send the postcode and we will confirm.