Commercial ventilation in County Londonderry
Commercial ventilation for businesses in County Londonderry — surveyed, designed and priced in writing before any work starts.
- Free site survey and fixed written quote
- Equipment, positions and price set out in writing
- Work planned around your opening hours
How much does commercial ventilation cost in County Londonderry?
Budget roughly £2,695–£22,500 per system ex VAT in County Londonderry. For a typical job — supply and extract for a 150 m² office — expect £6,395–£15,195 plus VAT. You get a fixed written quote after the free survey.
Commercial ventilation brings outdoor air into a building and removes stale air, using fans and ductwork to supply and extract air at the rates needed for the number of people and the activity.
Our coverage in County Londonderry
We cover all of County Londonderry, including Derry, Coleraine, Limavady and Magherafelt. Wherever your premises are, the survey, quote and installation follow the same steps.
Postcode districts we cover include BT28, BT45, BT46, BT47, BT48, BT49, BT51 and BT52. We plan work in County Londonderry so the noisy parts happen when they disturb your business least.
What is included
- Supply and extract fans, ductwork and grilles
- Filters, attenuators and fire dampers where required
- Controls such as timers or CO2 sensors
- Air-flow measurement and balancing
- Commissioning records
Guide prices in County Londonderry
Guide prices for County Londonderry, set for Northern Ireland. Your fixed price comes in writing.
| Item | Guide price (ex VAT) | Inc VAT | Basis |
|---|---|---|---|
| Toilet or kitchenette extract | £455–£1,350 | £546–£1,620 | per room |
| Supply and extract system, small premises | £2,695–£9,150 | £3,234–£10,980 | per system |
| CO2 demand control | £365–£1,150 | £438–£1,380 | per zone |
| Ductwork | £60–£180 | £72–£216 | per metre |
Ex VAT. Larger systems and fire-rated ductwork are priced from a full design.
How we work in County Londonderry
Assess
We work out how many people use each space and the fresh-air rate needed.
Design
Fan, duct and grille sizes are designed for air flow, noise and energy use.
Install
Ductwork and fans are installed and connected to controls. In County Londonderry we agree timings around your opening hours.
Balance
Air flows are measured and balanced to the design.
Before you book in County Londonderry
Building Regulations
New or altered ventilation in Northern Ireland must meet Technical Booklet K. We design to it and hand over the commissioning records.
Roof and height work
Flat roofs, high walls and atriums need the right access equipment and edge protection. We plan towers, MEWPs or scaffold before the job, not on the day.
Heat recovery
Bringing in cold air in winter costs energy. Heat recovery units reclaim much of it.
Access and parking
Town-centre jobs in County Londonderry often come down to access — loading restrictions, parking for the van and getting equipment onto a roof. We check this at survey and plan deliveries around it.
Who we work with in County Londonderry
- Healthcare and dental: clean, quiet cooling for surgeries, clinics, dental practices and care settings.
- Offices: zoned cooling and heating for open-plan floors, meeting rooms and comms rooms.
- Pubs and bars: cooling for busy bars, function rooms and cellars, sited with neighbours in mind.
- Schools and education: classroom cooling, ventilation and IT room cooling, installed in the holidays.
Compliance in Northern Ireland: refrigerant work falls under EU F-gas rules that apply in Northern Ireland, and buildings with more than 12 kW of air conditioning in total need a periodic energy inspection (often called TM44).
Your questions answered
How much does commercial ventilation cost in County Londonderry?
Guide prices in County Londonderry run from about £2,695 to £22,500 per system, plus VAT. A typical job (supply and extract for a 150 m² office) costs £6,395–£15,195 plus VAT. We fix the price in writing after a free survey.
Do you also cover County Tyrone, County Antrim and County Armagh?
Yes. Alongside County Londonderry, we also cover County Tyrone, County Antrim and County Armagh. Each has its own page with local guide prices.
Can ventilation and air conditioning work together?
Yes, and they should. We coordinate grilles, controls and set points so both systems work efficiently.
Do you install kitchen extraction?
Commercial kitchen canopies are a specialist area. We focus on general supply and extract, toilets and heat recovery, and can advise on kitchen requirements.
Get a guide price for County Londonderry
Free survey and fixed written quote. We reply with a guide price or to book the survey.