Indoor air quality surveys in County Londonderry

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.

Every job in County Londonderry gets a written quote before it starts and a commissioning record when it finishes. We cover Coleraine, Limavady and Derry and the villages around them.

Air quality surveys in County Londonderry at a glance

Area: County Londonderry, Northern Ireland
Towns listed: 3, largest Derry
Postcode districts: BT55, BT49, BT47, BT48 and BT52
Price region: Northern Ireland
Survey: By arrangement, travel quoted 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.

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.

Workplace survey

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

Guide prices in County Londonderry

Indoor air quality surveys guide prices in County Londonderry
Work	Guide price
Home air quality check: CO2, humidity and temperature logged for 7 days (per home)	£135–£225 inc VAT
Workplace air quality survey: CO2, PM2.5, humidity, 7 days logged, written report (per survey)	£455–£1,100 + VAT

These ranges use our Northern Ireland rates. Home prices include VAT at 20%; business prices exclude VAT. You get a fixed written price before any work is booked. Travel is quoted separately for this area.

When to get it looked at

A bedroom that feels stale in the morning
Headaches or drowsiness in meeting rooms or classrooms
Condensation and mould with no obvious cause

Rules in Northern Ireland

In Northern Ireland, ventilation is covered by the Building Regulations (Northern Ireland) and Technical Booklet K. Employers in Northern Ireland have an equivalent ventilation duty under the 1993 Northern Ireland workplace regulations.

How the job runs

Plan
Place loggers
Log
Analyse
Report

Towns we cover in County Londonderry

Questions about indoor air quality surveys in County Londonderry

Which rules apply to ventilation in County Londonderry?

In Northern Ireland, ventilation is covered by Technical Booklet K of the Building Regulations (Northern Ireland). Workplaces must be ventilated under the Workplace (Health, Safety and Welfare) Regulations (Northern Ireland) 1993.

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 towns in County Londonderry do you cover?

All of County Londonderry, including Coleraine, Limavady and Derry. If your town is not listed, send the postcode and we will confirm.

Are prices different in County Londonderry?

Our guide prices are adjusted by region. In County Londonderry we use Northern Ireland rates, so home air quality check: CO2, humidity and temperature logged for 7 days is typically £135 to £225 inc VAT per home.