Commercial ventilation in County Down
Commercial ventilation for businesses in County Down — 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 Down?
Budget roughly £2,695–£22,500 per system ex VAT in County Down. 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.
Covering County Down and nearby
We cover all of County Down, including Bangor, County Down, Castlereagh, Newtownards and Banbridge. Each town below has its own page with local guide prices.
Postcode districts we cover include BT4, BT18, BT22, BT24, BT27, BT30, BT32 and BT34. We plan work in County Down 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
Local guide prices for County Down
Guide prices for County Down, 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.
The steps for a project in County Down
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. We keep work areas in County Down screened and tidy at the end of each day.
Balance
Air flows are measured and balanced to the design.
Things to check in County Down
Noise
Fans and grilles are selected and attenuated to keep noise down.
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.
Fire
Ducts passing through fire-rated walls or floors need fire dampers.
Conservation areas
Historic streets and listed buildings in and around County Down are more likely to need planning permission for outdoor units on visible elevations. We check with the council's planning service before work is booked.
Premises we work in around County Down
- Offices: zoned cooling and heating for open-plan floors, meeting rooms and comms rooms.
- Restaurants and cafés: dining rooms that stay comfortable next to a hot kitchen and a busy service.
- Salons and spas: comfortable salons and treatment rooms despite dryers, lamps and steam.
- Healthcare and dental: clean, quiet cooling for surgeries, clinics, dental practices and care settings.
Two rules matter for most businesses in Northern Ireland: EU F-gas rules that apply in Northern Ireland (leak checks from 5 tonnes CO2e) and the periodic energy inspection for more than 12 kW of air conditioning.
FAQs for County Down
How much does commercial ventilation cost in County Down?
Guide prices in County Down 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 Antrim, County Armagh and County Tyrone?
Yes. Alongside County Down, we also cover County Antrim, County Armagh and County Tyrone. 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.
How much fresh air does an office need?
Guidance for offices is typically around 10 litres per second per person, with more for rooms with higher pollutant loads. We calculate it per space.
Get a guide price for County Down
Free survey and fixed written quote. We reply with a guide price or to book the survey.